JPS5834757B2 - Prehi Tatsukiro Tarikirun - Google Patents
Prehi Tatsukiro TarikirunInfo
- Publication number
- JPS5834757B2 JPS5834757B2 JP49090529A JP9052974A JPS5834757B2 JP S5834757 B2 JPS5834757 B2 JP S5834757B2 JP 49090529 A JP49090529 A JP 49090529A JP 9052974 A JP9052974 A JP 9052974A JP S5834757 B2 JPS5834757 B2 JP S5834757B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary kiln
- exhaust gas
- raw material
- preheater
- cement raw
- 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
Links
Landscapes
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Description
【発明の詳細な説明】
本発明はプレヒータ付ロータリキルンを有するセメント
原料焼成装置に於けるセメント原料の焼成方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for firing cement raw materials in a cement raw material firing apparatus having a rotary kiln with a preheater.
従来この種セメント焼成装置に於てロータリキルンの排
ガスをプレヒータのサイクロンに導り煙道に於て重油を
燃焼して粉末原料を加熱して仮焼を行うものは特公昭４
３−３００５８号、特許６４５５１８号によって公知で
ある。Conventionally, in this type of cement firing equipment, the exhaust gas from the rotary kiln is guided to the cyclone of the preheater, and heavy oil is burned in the flue to heat the powder raw material for calcination.
No. 3-30058 and Japanese Patent No. 645518.
この場合、該煙道は重油の噴霧燃焼むよび粉末原料との
熱交換のため充分な容積を有し、且つ粉末原料をプレヒ
ータの最終段サイクロンへ運搬する充分なガス流速を有
することを必要とされるので、これを満足するように設
計することは極めて困難であった。In this case, the flue must have a sufficient volume for spray combustion of heavy oil and heat exchange with the powder raw material, and a sufficient gas flow rate to convey the powder raw material to the final stage cyclone of the preheater. Therefore, it is extremely difficult to design a device that satisfies this requirement.
又、キルンのプレヒータ寄りの端部に燃料を供給して、
可燃ガス化し、排ガスと共に■焼室に導入し酸素含有ガ
スを供給して発火燃焼させるものは特開昭５０−１３３
２１号によって公知であるが上記可燃ガス化のため該端
部内に於て原料を冷却−それに相当するだけ該■焼室に
於て原料を余分に加熱するため該鍜焼室を高温大形化せ
ねばならぬ問題点があった。Also, supply fuel to the end of the kiln near the preheater,
JP-A-50-133 discloses a method that converts the gas into a combustible gas, introduces it into the combustion chamber together with the exhaust gas, supplies oxygen-containing gas, and ignites and burns it.
As is known from No. 21, the raw material is cooled in the end section for the above-mentioned combustible gasification - the raw material is heated correspondingly more in the roasting chamber, and the temperature and size of the roasting chamber is increased. There were issues that needed to be addressed.
本発明は上記した従来のものの問題点に鑑みてなされた
もので、ロータリキルンと同ロータリキルンに連結する
複数段のサイクロンよりなるプレヒータとを有するセメ
ント原料焼成装置にむいて、プレヒータに連結するロー
タリキルン后端部に燃料を供給し同燃料をプレヒータか
らロータリキルンに供給されるセメント原料と混和しな
がらロータリキルンの前端部から肩端部に向って流れる
排ガスの含有酸素によって緩やかに燃焼させ、その未燃
分を該排ガスと共にロータリキルンとプレヒ−メの第１
サイクロンとを接続する排ガス導管に導き、同排ガスに
空気を供給して上記未燃分を燃焼させるセメント原料の
焼成方法に係り、本発明によれば、該燃料は広いロータ
リキルン内に於て、その前端部に向は回転しながら移動
するセメント原料に混和しながら緩やかに燃焼するので
、セメント原料はよく焼成され吸熱作用をして温度を９
００℃程度に保つことができ、燃焼ガス温度を１２００
℃以下にして燃焼時酸化窒素の発生を防止することがで
きるもので、又ロータリキルンから排ガス導管に導ひか
れる未然分を燃焼させる、いわゆるアフターパニングす
るので、ここでも酸化窒素を還元除去できるものであり
、窒素酸化物が原料と相俟ってサイクロン等の内壁に付
着しプレヒータ自体の圧損を大きくする等の問題点を未
然に防止し、焼成作用をスムーズに行なわし得るもので
ある。The present invention has been made in view of the problems of the conventional ones described above, and is aimed at a cement raw material firing apparatus having a rotary kiln and a preheater consisting of a plurality of stages of cyclones connected to the rotary kiln. Fuel is supplied to the rear end of the kiln, mixed with the cement raw material supplied from the preheater to the rotary kiln, and slowly combusted by the oxygen contained in the exhaust gas flowing from the front end of the rotary kiln toward the shoulder end. The unburned matter is sent to the rotary kiln and the first preheater together with the exhaust gas.
According to the present invention, the fuel is introduced into an exhaust gas conduit connected to a cyclone, and air is supplied to the exhaust gas to burn the unburned components.According to the present invention, the fuel is placed in a wide rotary kiln, The front end rotates and slowly burns while mixing with the moving cement raw material, so the cement raw material is well fired and absorbs heat, reducing the temperature to 9.
Can maintain combustion gas temperature at around 1,200℃.
It is possible to prevent the generation of nitrogen oxides during combustion at temperatures below ℃, and it is also possible to reduce and remove nitrogen oxides because it burns the unused gas that is led from the rotary kiln to the exhaust gas pipe, so-called afterpanning. This prevents problems such as nitrogen oxides adhering to the inner wall of the cyclone etc. together with the raw material and increasing the pressure loss of the preheater itself, and allows the firing operation to be carried out smoothly.
しかも同アフターパニングによりプレヒータの熱量を高
めセメント原料の予熱を確実に行なえ、更にこのアフタ
ーパニングは未然分のみを燃焼させるだけなので、上記
した従来のものに比べ排ガス導管を低温、小形化するこ
とができる等の秀れた効果を奏しうるものである。In addition, this afterpanning increases the heat capacity of the preheater to ensure preheating of the cement raw material.Furthermore, since this afterpanning only burns the unused portion, the exhaust gas pipe can be kept at a lower temperature and smaller in size than the conventional method described above. It can produce excellent effects such as:
以下本発明の実施例を図に基づいて説明する。Embodiments of the present invention will be described below based on the drawings.
図に釦いて、１は前端部Ｆにバーナ１４を備えたロータ
リキルンで、同ロータリーキルン１の層端部Ａは複数段
のサイクロン３，４．５からなるプレヒータの第１サイ
クロン３に排ガス導管２を接続している。In the figure, 1 is a rotary kiln equipped with a burner 14 at the front end F, and the layer end A of the rotary kiln 1 is connected to the first cyclone 3 of a preheater consisting of multiple stages of cyclones 3, 4.5, and an exhaust gas conduit 2. are connected.
又該各サイクロンも夫々排ガス導管を介して接続し各排
ガス導管には上段サイクロンの原料シュートが開孔して
いる（例えばロータリキルン１と第１サイクロン３とを
接続する排ガス導管２には第２サイクロン４の原料シュ
ート８が開孔している。Each of the cyclones is also connected through an exhaust gas conduit, and each exhaust gas conduit has a raw material chute of the upper cyclone (for example, a second exhaust gas conduit 2 connecting the rotary kiln 1 and the first cyclone 3 has a The raw material chute 8 of the cyclone 4 is open.
６は第３サイクロン５の排ガス導管で、図示しない集塵
装置等に連絡している。Reference numeral 6 denotes an exhaust gas pipe of the third cyclone 5, which is connected to a dust collector, etc. (not shown).
７はセメント原料の投入管である。7 is a cement raw material input pipe.
９は第１サイクロン３の原料シュートで、同シュート９
はロータリキルン１の層端部Ａに臨んで開孔している。9 is the raw material chute of the first cyclone 3;
is open facing the layer end A of the rotary kiln 1.
１１は排ガス導管２の下部に設けられたエヤースライド
フィーダで、ロータリキルン１の層端部Ａにセメント原
料１３を供給させる作用をなすものであり、１２は同エ
ヤースライドフィーダの空気供給口である。Reference numeral 11 denotes an air slide feeder provided at the lower part of the exhaust gas conduit 2, which serves to supply the cement raw material 13 to the layer end A of the rotary kiln 1, and 12 is an air supply port of the air slide feeder. .
１５はロータリキルン１の層端部Ａに臨んで開孔する燃
料供給管で、同供給管１５から供給する燃料は重油等の
液体の細微粉炭の粉末燃料でもよい。Reference numeral 15 denotes a fuel supply pipe that opens facing the layer end A of the rotary kiln 1. The fuel supplied from the supply pipe 15 may be a liquid fuel such as heavy oil or powdered fuel of fine pulverized coal.
１６は上記排ガス導管２の途中に設けた空気補給口で同
補給口１６は同排ガス導管２の複数個所に多数設けても
勿論よい。Reference numeral 16 denotes an air replenishment port provided in the middle of the exhaust gas conduit 2, and it goes without saying that a large number of the replenishment ports 16 may be provided at a plurality of locations in the exhaust gas conduit 2.
このように構成されたものに釦いて、プレヒータから排
出されたセメント原料は、原料シュート９及びエヤース
ライドフィーダ１１によってロータリキルン１の層端部
Ａに供給され、又同時に重油等の燃料が燃料供給管１５
を介して該ロータキルン１の層端部Ａに噴射供給され、
ロータリキルン１０回転によって重油を粉末原料と混和
させつつ燃焼させ、セメント原料１３を加熱して焼成す
る。With this configuration, the cement raw material discharged from the preheater is supplied to the layer end A of the rotary kiln 1 by the raw material chute 9 and the air slide feeder 11, and at the same time, fuel such as heavy oil is supplied to the bed end A of the rotary kiln 1. tube 15
is injected and supplied to the layer end A of the rotor kiln 1 via
The rotary kiln rotates 10 times to burn the heavy oil while mixing it with the powder raw material, thereby heating and firing the cement raw material 13.
この場合、該燃料はロータリキルン１の前端部から層端
部に向は流れる排ガス１０によって加熱され且つその含
有する酸素によって緩やかに燃焼させ、又同燃焼に行い
て発生した未燃分は上記ロータリキルン１の排ガスに伴
ｉつで排ガス導管２に導かれそこで空気補給口１６から
の空気と相俟って燃焼させる。In this case, the fuel is heated by the exhaust gas 10 flowing from the front end of the rotary kiln 1 to the bed end, and is slowly combusted by the oxygen contained therein. The exhaust gas from the kiln 1 is guided into the exhaust gas conduit 2, where it is combusted together with air from the air supply port 16.
してみれば、燃料は広いロータリキルン１内に於いて、
その前端部Ｆに向は回転しながら移動するセメント原料
１３に混和しながら緩やかに燃焼するので、セメント原
料１３に能率よく焼成され、同セメント原料１３は吸熱
作用をすることにより９００℃程度の低温度に保ち、ガ
ス温度を１２００℃以下に止めて燃焼時に酸化窒素を殆
んど発生させることがなく、又、排ガス導管２で該燃焼
時にかける未燃分を再燃焼させるいわゆるアフターパニ
ングをさせるので、ここでも酸化窒素を還元除去できる
ものであり、窒素酸化物が原料と相俟ってサイクロン等
の内壁に付着しプレヒータ自体の圧損を大きくする等の
問題点を未然に防止し、焼成作用をスムーズに行なわし
得るものである。As a result, the fuel is stored in the wide rotary kiln 1.
The front end F of the cement raw material 13 burns slowly while being mixed with the moving cement raw material 13 while rotating, so that the cement raw material 13 is efficiently fired, and the cement raw material 13 absorbs heat to a low temperature of about 900°C. By keeping the gas temperature at 1200°C or less, almost no nitrogen oxide is generated during combustion, and so-called afterpanning is performed to reburn the unburned content that is applied during combustion in the exhaust gas pipe 2. This also reduces and removes nitrogen oxides, preventing problems such as nitrogen oxides adhering to the inner wall of the cyclone etc. together with the raw material and increasing the pressure loss of the preheater itself, and improving the firing action. It can be done smoothly.
しかも、同アフターパニングによりプレヒータの熱量を
高めセメント原料の予熱を確実に行なえ、更にこのアフ
ターパニングは未燃分のみを燃焼させるだけなので、上
記した従来のものに比べ排ガス導管を低温、小形化する
ことができる等の秀れた効果を奏しうるものである。In addition, this afterpanning increases the heat capacity of the preheater to ensure preheating of the cement raw material.Furthermore, since this afterpanning only burns unburned matter, the exhaust gas pipe can be kept at a lower temperature and smaller in size than the conventional method described above. It can produce excellent effects such as:
同上記した実施例ではロータリキルン１の肩端部Ａにプ
レヒータで予熱されたセメント原料Ｂと燃料とを独立に
供給しているが、それをあらかじめ混合して該ロータリ
キルン１の肩端部Ａに供給しても上記実施例と同様の作
用効果を奏し得るものである。In the embodiment described above, the cement raw material B preheated by a preheater and the fuel are independently supplied to the shoulder end A of the rotary kiln 1. The same effects as in the above embodiments can be obtained even if it is supplied to the above embodiment.
図面は本発明の実施例を示すセメント焼成装置の概略説
明図である。
１・・・ロータリキルン、２・・・排ガス導管、３・・
・第１サイクロン、４・・・第２サイクロン、５・・・
第３サイクロン、８，９・・・原料シュート、１５・・
・燃料供給管、１６・・・空気補給口、Ａ・・・ロータ
リキルン１の肩端部、Ｆ・・・ロータリキルン１の前端
部。The drawing is a schematic explanatory diagram of a cement firing apparatus showing an embodiment of the present invention. 1...Rotary kiln, 2...Exhaust gas pipe, 3...
・First cyclone, 4...Second cyclone, 5...
Third cyclone, 8, 9... Raw material chute, 15...
-Fuel supply pipe, 16... Air supply port, A... Shoulder end of rotary kiln 1, F... Front end of rotary kiln 1.
Claims (1)
段のサイクロンよりなるプレヒータとを有するセメント
原料焼成装置に督いて、プレヒータに連絡するロータリ
キルン后端部に燃料を供給し同燃料をプレヒータからロ
ータリキルンに供給されるセメント原料と混和しながら
ロータリキルンの前端部から肩端部に向って流れる排ガ
スの含有酸素によって緩やかに燃焼させ、その未燃分を
該排ガスと共にロータリキルンとプレヒータの第１サイ
クロンとを接続する排ガス導管に導き、同排ガスに空気
を供給して上記未燃分を燃焼させることを特徴とするセ
メント原料の焼成方法。1. A cement raw material firing device having a rotary kiln and a preheater consisting of a plurality of stages of cyclones connected to the rotary kiln is directed, fuel is supplied to the rear end of the rotary kiln connected to the preheater, and the fuel is passed from the preheater to the rotary kiln. Oxygen contained in the exhaust gas flowing from the front end to the shoulder end of the rotary kiln is mixed with the supplied cement raw material to slowly burn it, and the unburned portion is sent together with the exhaust gas to the rotary kiln and the first cyclone of the preheater. A method for firing cement raw materials, characterized in that the unburned components are combusted by introducing the exhaust gas into a connected exhaust gas pipe and supplying air to the exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49090529A JPS5834757B2 (en) | 1974-08-07 | 1974-08-07 | Prehi Tatsukiro Tarikirun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49090529A JPS5834757B2 (en) | 1974-08-07 | 1974-08-07 | Prehi Tatsukiro Tarikirun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5118728A JPS5118728A (en) | 1976-02-14 |
| JPS5834757B2 true JPS5834757B2 (en) | 1983-07-28 |
Family
ID=14000933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49090529A Expired JPS5834757B2 (en) | 1974-08-07 | 1974-08-07 | Prehi Tatsukiro Tarikirun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834757B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543834A (en) * | 1977-06-10 | 1979-01-12 | Mitsubishi Heavy Ind Ltd | Rotary kiln equipped with preheater |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133221A (en) * | 1974-03-22 | 1975-10-22 |
-
1974
- 1974-08-07 JP JP49090529A patent/JPS5834757B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133221A (en) * | 1974-03-22 | 1975-10-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5118728A (en) | 1976-02-14 |
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