JPH0733112Y2 - Direct heating rotary kiln - Google Patents
Direct heating rotary kilnInfo
- Publication number
- JPH0733112Y2 JPH0733112Y2 JP1989012673U JP1267389U JPH0733112Y2 JP H0733112 Y2 JPH0733112 Y2 JP H0733112Y2 JP 1989012673 U JP1989012673 U JP 1989012673U JP 1267389 U JP1267389 U JP 1267389U JP H0733112 Y2 JPH0733112 Y2 JP H0733112Y2
- Authority
- JP
- Japan
- Prior art keywords
- hot gas
- raw material
- rotary furnace
- rotary
- rotary kiln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は固体原料焼成用の直接式のロータリキルンに関
する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a direct rotary kiln for firing solid raw materials.
第４図に従来技術による直接式ロータリキルンを示す。
第４図において、01は回転炉、02は回転炉の一端に設け
られた熱ガス導入口、03は回転炉の他端に設けられた原
料投入口である。FIG. 4 shows a direct rotary kiln according to the prior art.
In FIG. 4, 01 is a rotary furnace, 02 is a hot gas inlet provided at one end of the rotary furnace, and 03 is a raw material inlet provided at the other end of the rotary furnace.
本ロータリキルンにおいては、固体原料は回転炉01の端
部の原料投入口03より回転炉01の内部へ導入され、熱ガ
ス導入口02より、同様に回転炉01の内部へ導入された熱
ガスと直接接触することにより、焼成が行なわれ熱ガス
導入口02より回転炉01の外部へ製品として排出される。
一方、熱ガスは固体原料との熱交換により徐々に温度が
下り、原料投入口03より回転炉01の外部へ排出される。In this rotary kiln, the solid raw material is introduced into the rotary furnace 01 through the raw material introduction port 03 at the end of the rotary furnace 01, and the hot gas similarly introduced into the rotary furnace 01 through the hot gas introduction port 02. By being in direct contact with, it is fired and discharged as a product from the hot gas introduction port 02 to the outside of the rotary furnace 01.
On the other hand, the temperature of the hot gas gradually decreases due to heat exchange with the solid raw material, and the hot gas is discharged from the raw material charging port 03 to the outside of the rotary furnace 01.
このようなロータリキルンにおいては、原料の焼成を最
適に行うためには、回転炉01の内部における固体原料の
昇温速度，保持温度，降温速度等を適性に制御すること
が必要であるが、従来の直接加熱式ロータリキルンにお
いては上記の制御が不可能であるという問題があった。In such a rotary kiln, in order to perform the firing of the raw material optimally, it is necessary to appropriately control the temperature rising rate, the holding temperature, the temperature lowering rate, etc. of the solid raw material inside the rotary furnace 01. The conventional direct heating type rotary kiln has a problem that the above control is impossible.
これを解決する１手段として、第５図に示す間接式ロー
タリキルンがある。同図において、01は回転炉、02は回
転炉の一端に設けられた熱ガス導入口、03は回転炉の他
端に設けられた原料投入口、04は加熱炉、05は加熱炉04
に配設された複数個のバーナである。As one means for solving this, there is an indirect rotary kiln shown in FIG. In the figure, 01 is a rotary furnace, 02 is a hot gas inlet provided at one end of the rotary furnace, 03 is a raw material inlet provided at the other end of the rotary furnace, 04 is a heating furnace, 05 is a heating furnace 04.
A plurality of burners arranged in the.
本ロータリキルンにおいては、回転炉01は加熱炉04の内
部を貫通しており、固体原料の焼成に必要な熱は加熱用
バーナ05により回転炉01の外表面から間接的に固体原料
に与えられるが、複数個の加熱用バーナ05の燃焼量を調
整することにより、回転炉01内部の温度分布を任意に制
御することができる。しかしながら本ロータリキルン
は、間接式であるため、熱効率が悪くまた制御応答生が
悪いという問題に加え、設備費が高価という欠点があ
り、また排ガス等を焼成の熱源として有効利用できない
という欠点があった。In this rotary kiln, the rotary furnace 01 penetrates the inside of the heating furnace 04, and the heat necessary for firing the solid raw material is indirectly given to the solid raw material from the outer surface of the rotary furnace 01 by the heating burner 05. However, the temperature distribution inside the rotary furnace 01 can be arbitrarily controlled by adjusting the combustion amounts of the plurality of heating burners 05. However, since this rotary kiln is an indirect type, in addition to the problems of poor thermal efficiency and poor control response, it also has the drawback of high equipment costs and the disadvantage that exhaust gas cannot be effectively used as a heat source for firing. It was
上記の従来の直接加熱式ロータリキルンは、上に説明し
たように、固体原料の昇温速度，保持温度，降温速度等
を適性に制御することができないという問題点がある
が、それに加えて、乾燥用熱ガスは比重の差によってキ
ルンの回転炉の上部のものが温度が高いが原料はキルン
の回転炉の下部にあるために、熱交換の効率が悪く、従
って乾燥効率が悪くなるという問題点がある。As described above, the conventional direct heating type rotary kiln has a problem that the temperature rising rate, holding temperature, temperature lowering rate, etc. of the solid raw material cannot be appropriately controlled. The hot gas for drying has a high temperature in the upper part of the rotary kiln of the kiln due to the difference in specific gravity, but since the raw material is in the lower part of the rotary kiln of the kiln, the efficiency of heat exchange is poor and therefore the drying efficiency is poor. There is a point.
また、上記の間接加熱式ロータリキルンは、上に説明し
たように、熱効率と制御応答性が悪く、かつ、設備費が
高く排ガス等を焼成の熱源として有効利用できないとい
う問題点がある。Further, as described above, the indirect heating type rotary kiln has a problem that the thermal efficiency and the control response are poor, the equipment cost is high, and exhaust gas cannot be effectively used as a heat source for firing.
本考案は、従来のロータリキルンの問題点を解決した直
接加熱式ロータリキルンを提供しようとするものであ
る。The present invention is intended to provide a direct heating type rotary kiln which solves the problems of the conventional rotary kiln.
（１）本考案は、熱ガスを回転炉内へ導入し原料を直接
的に加熱焼成するロータリキルンにおいて、回転炉の中
央部に回転しない熱ガス導入管を配設し、同熱ガス導入
管の側部に複数の回転炉への熱ガス噴射孔を設けた。(1) According to the present invention, in a rotary kiln in which hot gas is introduced into a rotary furnace to directly heat and sinter raw materials, a non-rotating hot gas introduction pipe is arranged in the center of the rotary furnace. A plurality of hot gas injection holes to the rotary furnace were provided on the side of the.
（２）また本考案は、上記ロータリキルンにおいて複数
の熱ガス噴射孔を熱ガス導入管の下半分に設けた。(2) Further, in the present invention, a plurality of hot gas injection holes are provided in the lower half of the hot gas introduction pipe in the rotary kiln.
上記（１）の本考案では、側部に設けられた複数の熱ガ
ス導入管の熱ガス噴射孔の数，位置及び大きさ等を選定
することによって、回転炉内の任意の位置に任意の量熱
ガスを導入できるため、回転炉内の温度が適性に制御さ
れる。In the present invention of the above (1), by selecting the number, position, size, etc. of the hot gas injection holes of the plurality of hot gas introduction pipes provided on the side portion, it can be set at any position in the rotary furnace. Since a quantity of hot gas can be introduced, the temperature in the rotary furnace is appropriately controlled.
また、上記（２）の本考案では、上記（１）のロータリ
キルンにおいて、更に複数の熱ガス噴射孔を熱ガス導入
管の下半分に設けることによって、高温の熱ガスを、回
転炉の下部に存在する原料に直接噴射できるので、原料
と熱ガスとの熱交換の効率が向上し、原料の焼成効率が
向上する。Further, in the present invention of (2) above, in the rotary kiln of (1) above, a plurality of hot gas injection holes are further provided in the lower half of the hot gas introducing pipe, so that high-temperature hot gas is supplied to the lower part of the rotary furnace. Since it can be directly injected to the raw material present in the, the efficiency of heat exchange between the raw material and the hot gas is improved, and the firing efficiency of the raw material is improved.
〔実施例〕 第１図ないし第３図によって、本考案の一実施例を説明
する。[Embodiment] An embodiment of the present invention will be described with reference to FIGS.
１は回転炉、２は回転炉１の一端に設けられた熱ガス導
入口、３は回転炉１の他端に設けられた原料導入口、６
は原料、９は熱ガス導入口に接続され回転炉１の中央部
を回転炉１の他端迄延びる熱ガス導入管で、その側部に
は複数の熱ガス噴出孔７が設けられている。８は回転炉
１の上記他端に設けられた排ガス排出口、11回転炉１の
熱ガス導入口２側の下部に設けられた製品出口である。
上記熱ガス導入管９は、熱ガス導入口２側は図示しない
固定部に支持され、排ガス出口８側は同排ガス出口８の
壁部に支持部材10によって支持され、回転炉１内におい
て回転しないように配置されている。また、複数の熱ガ
ス噴射孔７は、熱ガス導入管９の下半部に設けられ、原
料導入口３に近い方ではその数を多くし、製品出口11に
近い方ではその数が少くなるように設けられており、熱
ガス導入管９の排ガス出口８側の端部は閉鎖されてい
る。1 is a rotary furnace, 2 is a hot gas inlet provided at one end of the rotary furnace 1, 3 is a raw material inlet provided at the other end of the rotary furnace 1, 6
Is a raw material, 9 is a hot gas introducing pipe connected to the hot gas introducing port and extending from the central part of the rotary furnace 1 to the other end of the rotary furnace 1, and a plurality of hot gas ejection holes 7 are provided on the side part thereof. . Reference numeral 8 denotes an exhaust gas outlet provided at the other end of the rotary furnace 1 and a product outlet provided at a lower portion of the rotary furnace 1 on the hot gas inlet 2 side.
The hot gas introduction pipe 9 is supported on a fixed portion (not shown) on the hot gas introduction port 2 side, and is supported by a support member 10 on the exhaust gas outlet 8 side on the wall portion of the exhaust gas outlet 8 and does not rotate in the rotary furnace 1. Are arranged as follows. Further, the plurality of hot gas injection holes 7 are provided in the lower half portion of the hot gas introduction pipe 9, and the number thereof is large near the raw material introduction port 3 and small near the product outlet 11. Thus, the end portion of the hot gas introduction pipe 9 on the exhaust gas outlet 8 side is closed.
本実施例では、原料導入口３より回転炉１内へ投入され
た原料６は、回転炉１の回転に従って製品出口11の方へ
進み回転炉１外へ排出される。原料６の焼成は原料が原
料導入口３より導入され回転炉１の製品出口11から排出
される間に、第２図中に矢印で示すように熱ガス導入管
９の側部に設けられた複数の熱ガス噴射孔７から回転炉
１内へ噴射された熱ガスによって行われる。原料の加熱
を行ったガスは排ガス排出口８から排出される。In the present embodiment, the raw material 6 charged into the rotary furnace 1 through the raw material inlet 3 advances toward the product outlet 11 as the rotary furnace 1 rotates and is discharged to the outside of the rotary furnace 1. The firing of the raw material 6 was provided on the side portion of the hot gas introduction pipe 9 as indicated by an arrow in FIG. 2 while the raw material was introduced from the raw material introduction port 3 and discharged from the product outlet 11 of the rotary furnace 1. This is performed by the hot gas injected into the rotary furnace 1 through the plurality of hot gas injection holes 7. The gas obtained by heating the raw material is discharged from the exhaust gas discharge port 8.
原料焼成の温度プログラムは第３図に示すように焼成の
初期段階で温度が高く後期段階で温度を低めに設定する
ことが望ましいが、本実施例では、上記のように熱ガス
導入管９の下半分に設けた複数の熱ガス噴射孔７を原料
入口近傍で数を多くし、製品出口近傍では数を少なくし
ているために、原料６に噴射される熱ガス量が、原料入
口側で多く製品出口側で少なくすることができるので、
第３図に示すような望ましい温度プログラムで原料を焼
成することができる。このように、本実施例では、熱ガ
ス導入管９の複数の熱ガス噴射孔７の位置と大きさを適
宜選定することによって、回転炉１内の任意の位置に任
意の量の熱ガスを導入することができ、回転炉１内の温
度を適性に制御することができる。As shown in FIG. 3, the temperature program of the raw material firing is preferably set such that the temperature is high in the initial stage of firing and low in the latter stage, but in the present embodiment, as described above, the temperature of the hot gas introduction pipe 9 Since the number of the plurality of hot gas injection holes 7 provided in the lower half is increased near the raw material inlet and the number is decreased near the product outlet, the amount of hot gas injected into the raw material 6 is smaller on the raw material inlet side. Many products can be reduced on the outlet side, so
The raw material can be fired with a desired temperature program as shown in FIG. As described above, in this embodiment, by appropriately selecting the positions and sizes of the plurality of hot gas injection holes 7 of the hot gas introduction pipe 9, an arbitrary amount of hot gas can be supplied to any position in the rotary furnace 1. It can be introduced, and the temperature in the rotary furnace 1 can be appropriately controlled.
また更に、本実施例では、回転しないガス導入管９の下
半部に複数の熱ガス噴射孔７を設けており、回転炉１の
下部に存在する原料に向って熱ガスを噴射して原料と熱
ガスとの熱交換の効率を上げることができる。Furthermore, in the present embodiment, a plurality of hot gas injection holes 7 are provided in the lower half of the non-rotating gas introduction pipe 9, and the hot gas is injected toward the raw material existing in the lower part of the rotary furnace 1 to produce the raw material. The efficiency of heat exchange with the hot gas can be increased.
なお、本考案における熱ガス噴射孔の形状は、円形はも
ちろん、回転炉の軸方向又は円周方向に延びるスロット
状等とすることができ、またその数も適宜の数とするこ
とができる。In addition, the shape of the hot gas injection holes in the present invention may be a circular shape or a slot shape extending in the axial direction or the circumferential direction of the rotary furnace, and the number thereof may be an appropriate number.
本考案は、回転炉の中央部に配設された回転しない熱ガ
ス導入管の側部に設けられた複数のガス噴射孔の個数、
位置及び大きさ等を選定することによって、焼成温度を
高くしたいゾーンでは熱ガスの量を多くし、焼成温度を
低くしたいゾーンでは熱ガスの量を少くすることがで
き、回転炉内の原料を任意の焼成プログラムで焼成する
ことができる。The present invention is directed to a plurality of gas injection holes provided on the side of a non-rotating hot gas introduction pipe arranged in the center of a rotary furnace.
By selecting the position and size, the amount of hot gas can be increased in the zone where the firing temperature is desired to be high, and the amount of hot gas can be reduced in the zone where the firing temperature is desired to be low. It can be fired by any firing program.
また、複数の熱ガス噴射孔を熱ガス導入管の下半部に設
けることにより、原料の存在する回転炉の下部へ熱ガス
を噴射することができるので、熱ガスと原料との熱交換
が効率よくでき焼成に必要なエネルギーを低減させるこ
とができる。Further, by providing a plurality of hot gas injection holes in the lower half of the hot gas introduction pipe, the hot gas can be injected to the lower part of the rotary furnace in which the raw material exists, so that heat exchange between the hot gas and the raw material is possible. The efficiency can be improved and the energy required for firing can be reduced.
第１図は本考案の一実施例に係るロータリキルンの構造
図、第２図は第１図のＡ−Ａ断面図、第３図は上記実施
例の原料焼成温度プログラムを示すグラフ、第４図は従
来の直接式ロータリキルンの構造図、第５図は従来の間
接式ロータリキルンの構造図である。 １…回転炉、２…熱ガス導入口、３…原料導入口、６…
原料、７…熱ガス噴射孔、８…熱ガス排出口、９…熱ガ
ス導入管、10…支持部材、11…製品出口。1 is a structural view of a rotary kiln according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a graph showing a raw material firing temperature program of the above embodiment, and FIG. FIG. 5 is a structural diagram of a conventional direct rotary kiln, and FIG. 5 is a structural diagram of a conventional indirect rotary kiln. 1 ... Rotary furnace, 2 ... Hot gas inlet, 3 ... Raw material inlet, 6 ...
Raw material, 7 ... Hot gas injection hole, 8 ... Hot gas discharge port, 9 ... Hot gas introduction pipe, 10 ... Support member, 11 ... Product outlet.
Claims (2)
加熱焼成するロータリキルンにおいて、回転炉の中央部
に回転しない熱ガス導入管を配設し、同熱ガス導入管の
側部に複数の回転炉への熱ガス噴射孔を設けたことを特
徴とする直接加熱式ロータリキルン。1. In a rotary kiln in which hot gas is introduced into a rotary furnace to directly heat and sinter raw materials, a non-rotating hot gas introduction pipe is arranged at the center of the rotary furnace, and the side of the hot gas introduction pipe is provided. A direct heating rotary kiln, characterized in that a hot gas injection hole for a plurality of rotary furnaces is provided in the section.
下半分に設けたことを特徴とする直接加熱式ロータリキ
ルン。2. A direct heating type rotary kiln, wherein the plurality of hot gas injection holes are provided in the lower half of the hot gas introducing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989012673U JPH0733112Y2 (en) | 1989-02-07 | 1989-02-07 | Direct heating rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989012673U JPH0733112Y2 (en) | 1989-02-07 | 1989-02-07 | Direct heating rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02106593U JPH02106593U (en) | 1990-08-24 |
| JPH0733112Y2 true JPH0733112Y2 (en) | 1995-07-31 |
Family
ID=31222325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989012673U Expired - Lifetime JPH0733112Y2 (en) | 1989-02-07 | 1989-02-07 | Direct heating rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0733112Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6143615Y2 (en) * | 1980-08-02 | 1986-12-09 |
-
1989
- 1989-02-07 JP JP1989012673U patent/JPH0733112Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02106593U (en) | 1990-08-24 |
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