JPH0432793B2 - - Google Patents
Info
- Publication number
- JPH0432793B2 JPH0432793B2 JP20713585A JP20713585A JPH0432793B2 JP H0432793 B2 JPH0432793 B2 JP H0432793B2 JP 20713585 A JP20713585 A JP 20713585A JP 20713585 A JP20713585 A JP 20713585A JP H0432793 B2 JPH0432793 B2 JP H0432793B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- preheating device
- gas system
- exhaust gas
- raw material
- 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
- 239000007789 gas Substances 0.000 claims description 124
- 239000000843 powder Substances 0.000 claims description 105
- 239000002994 raw material Substances 0.000 claims description 54
- 239000000567 combustion gas Substances 0.000 claims description 44
- 239000000446 fuel Substances 0.000 claims description 35
- 238000001354 calcination Methods 0.000 claims description 28
- 238000010304 firing Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims 1
- 238000005245 sintering Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Details (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、セメント、アルミナ、石灰等の粉
末状原料用の複数系統型予熱装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multi-system preheating device for powdered raw materials such as cement, alumina, lime, etc.
（従来の技術）
従来、粉末原料予熱装置は種々に構成されてお
り、その中には、焼成炉からの排ガスを主として
使用する排ガス系統予熱装置と、焼成物用冷却装
置からの高温の排出空気を用いて仮焼炉内で燃料
を燃焼させ、これにより発生させた燃焼ガスを主
として使用する燃焼ガス系統予熱装置との複数系
統を有するものがある。(Prior Art) Conventionally, powder raw material preheating devices have various configurations, including an exhaust gas system preheating device that mainly uses exhaust gas from a firing furnace, and a preheating device that uses high temperature exhaust air from a cooling device for fired products. Some systems have multiple systems including a combustion gas system preheating device that mainly uses the combustion gas generated by combusting fuel in a calciner using a calcination furnace.
上記のようにガスの流れに見て並列に各予熱装
置を設置する仮焼方式では、焼成炉排ガスが燃焼
ガス系統に配置された仮焼炉内を通過しないた
め、仮焼炉における燃料の燃焼性能に優れている
と共に、仮焼炉をコンパクトに構成できるという
長所を有している。 As mentioned above, in the calcining method in which each preheating device is installed in parallel with the gas flow, the combustion furnace exhaust gas does not pass through the calciner located in the combustion gas system, so the fuel is combusted in the calciner. It has the advantage that it has excellent performance and that the calciner can be constructed compactly.
しかし、上記のような仮焼方式において、燃焼
ガス系統予熱装置では供給する燃料の量的調整に
より粉末原料を高度に仮焼することができるが、
排ガス系統予熱装置では1000〜1100℃程度の温度
で導入される焼成炉の排ガスが上記予熱装置内で
850〜950℃程度の温度まで低下する間に粉末原料
の仮焼のために利用しうる熱量が、前記予熱装置
から前記排ガスが350〜450℃程度まで低下して排
出されるまでの間に粉末原料の予熱のために利用
しうる熱量に対して不足するため、排ガス系統予
熱装置から焼成炉に排出される粉末原料の仮焼率
を高くすることができないか、或いは高度に仮焼
しうる程度に排ガス系統予熱装置に供給する粉末
原料の量を制限すれば、予熱のために利用しうる
熱量が余剰にして予熱装置から排出されるガス温
度が上昇することになる。 However, in the above-mentioned calcination method, the combustion gas system preheating device allows the powder raw material to be highly calcined by adjusting the amount of fuel supplied.
In the exhaust gas system preheating device, the exhaust gas from the kiln, which is introduced at a temperature of about 1000 to 1100℃, is inside the preheating device.
The amount of heat that can be used for calcination of the powder raw material during the temperature drop to about 850 to 950°C is the Due to insufficient heat compared to the amount of heat available for preheating the raw materials, it is not possible to increase the calcination rate of the powder raw materials discharged from the exhaust gas system preheating device to the kiln, or to the extent that calcination is possible to a high degree. If the amount of powdered raw material supplied to the exhaust gas system preheating device is restricted, the amount of heat that can be used for preheating becomes surplus and the temperature of the gas discharged from the preheating device increases.
このような不都合を解消するために、排ガス系
統予熱装置内の予熱原料の一部を燃焼ガス系統予
熱装置へ分岐して供給したり、或いは排ガス系統
予熱装置にも燃料を供給して不足する仮焼のため
の熱量を補うことが提案されている。 In order to eliminate such inconveniences, some of the preheating raw material in the exhaust gas system preheating device is branched and supplied to the combustion gas system preheating device, or fuel is also supplied to the exhaust gas system preheating device to prevent a shortage. It has been proposed to supplement the amount of heat for baking.
この従来例を第３図と第４図により具体的に説
明する。 This conventional example will be explained in detail with reference to FIGS. 3 and 4.
第３図はセメント原料焼成装置の系統図で第１
従来例を示している。 Figure 3 is a system diagram of the cement raw material firing equipment.
A conventional example is shown.
図において、１はセメント原料を焼成してクリ
ンカを得る焼成炉、２は燃焼炉１から排出される
クリンカを空気流により冷却する冷却装置であ
る。 In the figure, reference numeral 1 indicates a firing furnace for producing clinker by burning cement raw materials, and reference numeral 2 indicates a cooling device that cools the clinker discharged from the combustion furnace 1 by air flow.
上記焼成炉１にはこの焼成炉１からの排ガスで
粉末原料を予熱する排ガス系統予熱装置３が連結
されると共に、同上冷却装置２にはこの冷却装置
２からの排出空気を用い後述の如く燃料を燃焼さ
せてこの燃焼ガスで粉末原料を予熱する燃焼ガス
系統予熱装置４が連結される。また、上記焼成炉
１は冷却装置２に空気通路６により接続され、冷
却装置２からの高温の排出空気がこの空気通路６
を通つて焼成炉１での燃料燃焼用としてこの焼成
炉１に送り込まれる。 The firing furnace 1 is connected to an exhaust gas system preheating device 3 that preheats the powder raw material with the exhaust gas from the firing furnace 1, and the cooling device 2 uses the exhaust air from the cooling device 2 to produce fuel as described below. A combustion gas system preheating device 4 is connected to the combustion gas system for preheating the powder raw material by burning the combustion gas. Further, the firing furnace 1 is connected to a cooling device 2 through an air passage 6, and the high temperature exhaust air from the cooling device 2 is passed through the air passage 6.
The fuel is sent to the kiln 1 through the kiln 1 for fuel combustion in the kiln 1.
上記排ガス系統予熱装置３について説明する。 The exhaust gas system preheating device 3 will be explained.
この排ガス系統予熱装置３は上下方向に積重し
たサイクロン等の粉末分離器C11〜C14を有し、各
粉末分離器のガス排出口とこの粉末分離器上方の
他の粉末分離器のガス導入口とがそれぞれガスダ
クト７ａにより連結される。また、焼成炉１のガ
ス排出口と最下段の粉末分離器C14のガス導入口
もガスダクト７ａにより接続される。更に、最上
段の粉末分離器C11のガス排出口は排ガスフアン
１２ａにガスダクト７ｂにより接続される。 This exhaust gas system preheating device 3 has powder separators C 11 to C 14 such as cyclones stacked vertically, and the gas discharge port of each powder separator and the gas of other powder separators above this powder separator are connected to each other. The inlets are connected to each other by gas ducts 7a. Furthermore, the gas outlet of the firing furnace 1 and the gas inlet of the powder separator C14 at the lowest stage are also connected by a gas duct 7a. Furthermore, the gas outlet of the powder separator C 11 at the top stage is connected to the exhaust gas fan 12a by a gas duct 7b.
上記各粉末分離器のガス導入口と、この粉末分
離器上方の他の粉末分離器の粉末排出口とがそれ
ぞれ原料シユート１３により連結される。また、
最上段の粉末分離器C11のガス導入口側ガスダク
ト７ａには粉末原料を投入する原料供給口１６が
設けられる。一方、最下段の粉末分離器C14の粉
末排出口は焼成炉１に原料シユート１４により接
続される。 The gas inlet of each powder separator is connected to the powder outlet of another powder separator above this powder separator by a raw material chute 13, respectively. Also,
The gas duct 7a on the gas inlet side of the powder separator C11 at the top stage is provided with a raw material supply port 16 into which powdered raw material is introduced. On the other hand, the powder discharge port of the powder separator C 14 at the lowest stage is connected to the firing furnace 1 through a raw material chute 14 .
次に、上記燃焼ガス系統予熱装置４について説
明する。 Next, the combustion gas system preheating device 4 will be explained.
この燃焼ガス系統予熱装置４は上記排ガス系統
予熱装置３と同様に構成され、上下方向に積重し
た粉末分離器C21〜C24及び排ガスフアン１２ｂを
有していると共に、これらを接続するガスダクト
７ａ，７ｂ、及び原料シユート１３，１４を有し
ている。また、この燃焼ガス系統予熱装置４では
最下段の粉末分離器C24のガス導入口側ガスダク
ト７ａと、この粉末分離器C24上方に位置する粉
末分離器C23の粉末排出口との間に、冷却装置２
からの排出空気を用いて燃料を燃焼させて粉末原
料を予熱する仮焼炉８が介設される。この仮焼炉
８は排出空気ダクト９により冷却装置２に接続さ
れると共に、上記仮焼炉８には独立した燃料供給
装置１０が設けられる。 This combustion gas system preheating device 4 is constructed in the same manner as the exhaust gas system preheating device 3, and includes powder separators C 21 to C 24 stacked in the vertical direction and an exhaust gas fan 12b, and a gas duct connecting these. 7a, 7b, and raw material chute 13, 14. In addition, in this combustion gas system preheating device 4, there is a gas duct 7a on the gas inlet side of the powder separator C 24 at the lowest stage and the powder discharge port of the powder separator C 23 located above this powder separator C 24 . , cooling device 2
A calciner 8 is provided which preheats the powder raw material by burning fuel using air discharged from the furnace. This calciner 8 is connected to a cooling device 2 by an exhaust air duct 9 and is provided with an independent fuel supply device 10 .
また、前記排ガス系統予熱装置３における下か
ら２段目の粉末分離器C13の粉末排出口からの原
料シユート１３の中途部が燃焼ガス系統予熱装置
４の仮焼炉８に分岐シユート１５により接続され
る。 Further, a midway portion of the raw material chute 13 from the powder discharge port of the powder separator C 13 at the second stage from the bottom in the exhaust gas system preheating device 3 is connected to the calciner 8 of the combustion gas system preheating device 4 by a branch chute 15. be done.
そして。上記冷却装置２でクリンカを冷却した
高温の排出空気は焼成炉１で燃焼されて排ガスと
なり、排ガス系統予熱装置３においては、排ガス
フアン１２ａにより吸引されて最下段の粉末分離
器C14から最上段の粉末分離器C11へと流される。
また、燃焼ガス系統予熱装置４においては、上記
冷却装置２からの排出空気は仮焼炉８で燃焼さ
れ、このガスは排ガスフアン１２ｂにより吸引さ
れて最下段の粉末分離器C24から最上段の粉末分
離器C21へと流される（図中排ガスの流れは実線
矢印で示す）。 and. The high-temperature exhaust air that has cooled the clinker in the cooling device 2 is burned in the kiln 1 to become exhaust gas, and in the exhaust gas system preheating device 3, it is sucked by the exhaust gas fan 12a and sent from the lowest stage powder separator C 14 to the top stage. powder separator C 11 .
In the combustion gas system preheating device 4, the exhaust air from the cooling device 2 is burned in the calciner 8, and this gas is sucked by the exhaust gas fan 12b and sent from the powder separator C 24 at the lowest stage to the powder separator C 24 at the top stage. The exhaust gas flows into powder separator C 21 (the flow of exhaust gas is indicated by solid arrows in the figure).
一方、各原料供給口１６，１６から投入される
粉末原料は、各予熱装置３，４の最上段の粉末分
離器C11，C21から下方段へ向つて流れ、焼成炉１
で焼成されてクリンカとなり、冷却装置２で冷却
されて次工程へ移送される（図中粉末原料の流れ
は破線矢印で示す）。 On the other hand, the powder raw materials inputted from the respective raw material supply ports 16 and 16 flow from the powder separators C 11 and C 21 at the top stage of each preheating device 3 and 4 toward the lower stage, and flow into the firing furnace 1.
The powder is fired into clinker, cooled by a cooling device 2, and transferred to the next process (the flow of the powder raw material is indicated by broken line arrows in the figure).
上記の場合、排ガス系統予熱装置３における下
から２段目の粉末分離器C13から排出される予熱
された粉末原料の一部は燃焼ガス系統予熱装置４
の仮焼炉８へ分岐供給される。従つて、上記粉末
分離器C13から最下段の粉末分離器C14のガス導入
口側ガスダクト７ａへ投入される粉末原料の量的
比率は少なくなる。このため、排ガス系統予熱装
置３における最下段の粉末分離器C14から焼成炉
１供給される粉末原料は上記ガスダクト７ａ内を
流れる間に高度な仮焼が達成される。なお、燃焼
ガス系統予熱装置４では、燃料供給装置１０から
仮焼炉８内に供給する燃料の調整により粉末原料
を高度に仮焼することができる。 In the above case, a part of the preheated powder raw material discharged from the powder separator C 13 at the second stage from the bottom in the exhaust gas system preheating device 3 is transferred to the combustion gas system preheating device 4.
It is branched and supplied to the calcining furnace 8. Therefore, the quantitative ratio of the powder raw material fed from the powder separator C 13 to the gas inlet side gas duct 7a of the lowest stage powder separator C 14 is reduced. Therefore, the powder raw material supplied to the firing furnace 1 from the powder separator C 14 at the lowest stage in the exhaust gas system preheating device 3 is highly calcined while flowing through the gas duct 7a. In addition, in the combustion gas system preheating device 4, the powder raw material can be highly calcined by adjusting the fuel supplied from the fuel supply device 10 into the calcining furnace 8.
第４図は第２従来例を示しているが、この従来
例は第３図に示す第１従来例と基本構成は同一で
ある。よつて、同一構成のものには同一の符号を
付し、その説明は省略する。 FIG. 4 shows a second conventional example, which has the same basic configuration as the first conventional example shown in FIG. Therefore, the same components are given the same reference numerals, and the explanation thereof will be omitted.
この従来例では、排ガス系統予熱装置３の最下
段の粉末分離器C14のガス導入口側ガスダクト７
ａと、この粉末分離器C14の上方に位置する粉末
分離器C13の粉末排出口との間に他の仮焼炉１８
が介設され、この仮焼炉１８には必要に応じて冷
却装置２からの排出空気を供給する排出空気ダク
ト１９が接続されると共に、この仮焼炉１８に独
立した燃料供給装置２０が設けられる。 In this conventional example, the gas duct 7 on the gas inlet side of the powder separator C 14 at the lowest stage of the exhaust gas system preheating device 3
A and the powder discharge port of the powder separator C 13 located above this powder separator C 14 , there is another calciner 18.
An exhaust air duct 19 is connected to the calciner 18 to supply exhaust air from the cooling device 2 as necessary, and an independent fuel supply device 20 is provided to the calciner 18. It will be done.
そして、排ガス系統予熱装置３の原料供給口１
６から投入された粉末原料は粉末分離器C13まで
の間に加熱され、その全量が燃焼炉１からの排ガ
ス中に供給される。この場合、焼成炉１からの排
ガスではこれら粉末原料を高度に仮焼するには熱
量的に不足する。そこで、燃料供給装置２０から
仮焼炉１８内に燃料を供給することにより粉末原
料を仮焼炉１８内で高度に仮焼させている。 Then, the raw material supply port 1 of the exhaust gas system preheating device 3
The powder raw material input from 6 is heated up to the powder separator C 13 , and the entire amount is fed into the exhaust gas from the combustion furnace 1. In this case, the exhaust gas from the firing furnace 1 is insufficient in calorific value to highly calcinate these powder raw materials. Therefore, the powder raw material is highly calcined in the calciner 18 by supplying fuel from the fuel supply device 20 to the calciner 18 .
（発明が解決しようとする問題点）
ところで、上記第１従来例では、焼成炉１から
排ガス系統予熱装置３に導入される排ガス量は、
主として両系統の予熱装置３，４から焼成炉１に
供給される粉末原料の温度及び仮焼度合いによつ
て決定されるものであり、排ガス量は燃焼ガス系
統予熱装置４を通過する燃焼ガス量より少ないも
ので、即ち、その比率は（排ガス系統）：（燃焼ガ
ス系統）＝（35〜40％）：（65〜60％）となつてい
る。また、上記両予熱装置では両系統の通過ガス
量を相互に調整する機能がない。このため、排ガ
ス系統予熱装置３と比較して燃焼ガス系統予熱装
置４の設備が遥かに大型となり、排ガス系統予熱
装置３と燃焼ガス系統予熱装置４との設備的アン
バランスが生じることとなつつている。(Problems to be Solved by the Invention) In the first conventional example, the amount of exhaust gas introduced from the firing furnace 1 to the exhaust gas system preheating device 3 is:
It is mainly determined by the temperature and degree of calcination of the powder raw materials supplied from the preheating devices 3 and 4 of both systems to the firing furnace 1, and the amount of exhaust gas is determined by the amount of combustion gas passing through the combustion gas system preheating device 4. In other words, the ratio is (exhaust gas system): (combustion gas system) = (35-40%): (65-60%). Furthermore, both of the preheating devices described above do not have a function of mutually adjusting the amount of gas passing through both systems. Therefore, compared to the exhaust gas system preheating device 3, the equipment for the combustion gas system preheating device 4 becomes much larger, resulting in an equipment imbalance between the exhaust gas system preheating device 3 and the combustion gas system preheating device 4. ing.
よつて、両系統予熱装置での部品の共通性に乏
しくなり、また、支持架構の床面に、段差を生じ
るため、構造設計面のみでなく操業性においても
好ましくない。 Therefore, there is a lack of commonality of parts between the preheating devices of both systems, and a level difference occurs on the floor surface of the support frame, which is unfavorable not only in terms of structural design but also in terms of operability.
また、上記第２従来例では、仮焼炉１８に燃料
を供給することにより、排ガス系統予熱装置３で
の仮焼のための不足熱量を補給するように構成さ
れている。しかし、このようにしても、燃焼ガス
系統予熱装置４と比較して排ガス系統予熱装置３
では、仮焼のために利用しうる熱量に対して予熱
のために利用しうる熱量が焼成炉１からの排ガス
の導入分量だけ余剰気味となる。 Further, in the second conventional example, the insufficient amount of heat for calcination in the exhaust gas system preheating device 3 is supplemented by supplying fuel to the calcination furnace 18. However, even with this arrangement, compared to the combustion gas system preheating device 4, the exhaust gas system preheating device 3
In this case, the amount of heat that can be used for preheating is a little surplus by the amount of exhaust gas introduced from the kiln 1 compared to the amount of heat that can be used for calcination.
このため、燃焼ガス系統予熱装置４と同程度の
高度な仮焼を排ガス系統予熱装置３で得ようとし
て、排ガス系統予熱装置３の仮焼炉１８への燃料
供給量を増加させれば、この排ガス系統予熱装置
３からの排ガス温度が上昇し、排ガス系統予熱装
置３と燃焼ガス系統予熱装置４との間で良好な熱
バランスを得ることができないという不都合を生
じる。 Therefore, if the amount of fuel supplied to the calcination furnace 18 of the exhaust gas system preheating device 3 is increased in an attempt to obtain a high degree of calcination with the exhaust gas system preheating device 3 equivalent to that of the combustion gas system preheating device 4, this The temperature of the exhaust gas from the exhaust gas system preheating device 3 increases, resulting in a disadvantage that a good heat balance cannot be obtained between the exhaust gas system preheating device 3 and the combustion gas system preheating device 4.
（発明の目的）
この発明は、上記のような事情に注目してなさ
れたもので、排ガス系統予熱装置と燃焼ガス系統
予熱装置により構成される複数系統型予熱装置に
おける粉末原料の仮焼を共に高度に達成すると共
に、これら両予熱装置を通過するガス量の調整機
能を持たせて両予熱装置間の設備的及び熱的バラ
ンスを同時に改善することを目的とする。(Object of the Invention) This invention has been made in view of the above-mentioned circumstances, and is designed to simultaneously perform calcination of powder raw materials in a multi-system preheating device consisting of an exhaust gas system preheating device and a combustion gas system preheating device. The purpose is to simultaneously improve the equipment and thermal balance between both preheating devices by providing a function to adjust the amount of gas passing through both preheating devices.
（発明の構成）
上記目的を達成するためのこの発明の特徴とす
るところは、排ガス系統予熱装置の最下段の粉末
分離器のガス導入口側に独立した燃料供給装置を
備え、排ガス系統予熱装置の下から２段目の粉末
分離器の粉末排出口を燃焼ガス系統予熱装置の仮
焼炉側に連結した点にある。(Structure of the Invention) A feature of the present invention for achieving the above object is that an independent fuel supply device is provided on the gas inlet side of the powder separator at the lowest stage of the exhaust gas system preheating device, and the exhaust gas system preheating device The powder discharge port of the second-stage powder separator from the bottom is connected to the calciner side of the combustion gas system preheating device.
（実施例）
以下、この発明の実施例を第１図と第２図によ
り説明する。なお、これら実施例は前記従来例と
基本構成は同一である。よつて、同一構成のもの
は同一符号を付し、その説明は省略する。(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. The basic configuration of these embodiments is the same as that of the conventional example. Therefore, those having the same configuration are given the same reference numerals, and the description thereof will be omitted.
第１図は第１実施例を示すものである。 FIG. 1 shows a first embodiment.
前記排ガス系統予熱装置３における下から２段
目の粉末分離器C13の粉末排出口と排ガス系統予
熱装置３の最下段の粉末分離器C14のガス導入口
との間で、この粉末分離器C14のガス導入口側ガ
スダクト７ａに独立した燃料供給装置２０が介設
される。 This powder separator is installed between the powder discharge port of the second powder separator C 13 from the bottom in the exhaust gas system preheating device 3 and the gas inlet of the lowest powder separator C 14 of the exhaust gas system preheating device 3. An independent fuel supply device 20 is interposed in the gas inlet side gas duct 7a of C14 .
そして、排ガス系統予熱装置３の原料供給口１
６から投入された粉末原料は下から２段目の粉末
分離器C13で分岐され、一部分は燃焼ガス系統予
熱装置４の仮焼炉８に供給され、他の一部分は排
ガス系統予熱装置３の最下段の粉末分離器C14の
ガス導入口側ガスダクト７ａに供給されて燃料供
給装置２０からこのガスダクト７ａに供給する燃
料により高度に仮焼が達成される。 Then, the raw material supply port 1 of the exhaust gas system preheating device 3
The powder raw material input from 6 is separated by the powder separator C 13 in the second stage from the bottom, and one part is supplied to the calciner 8 of the combustion gas system preheater 4, and the other part is supplied to the exhaust gas system preheater 3. Calcination is achieved to a high degree by the fuel supplied to the gas inlet side gas duct 7a of the powder separator C 14 at the lowest stage and supplied from the fuel supply device 20 to this gas duct 7a.
この際、各予熱装置での粉末原料の仮焼度合い
を同程度にすることが焼成装置の安定運転のため
には好ましく、このためには、各予熱装置の最下
段から焼成炉１に排出する粉末原料を同程度の温
度まで加熱することが望まれる。よつて、各予熱
装置の最下段の粉末分離器C14，C24から上方へと
排出される各予熱装置の熱ガス温度もほぼ同程度
となるので、各予熱装置内を通過する熱ガス量に
ほぼ比例して各予熱装置へ供給する粉末原料の量
を調整すれば、各予熱装置の下から２段目の粉末
分離器C13，C23から排出される粉末原料を同程度
に予熱できる。このため、最上段の粉末分離器
C11，C21から排出されるガス温度も同程度となる
ことから、各予熱装置について、ほぼ同様の温度
分布とすることができ、熱効率及び操業性という
点で好ましい温度条件が達成される。 At this time, it is preferable to maintain the same degree of calcination of the powder raw materials in each preheating device for stable operation of the firing device. It is desirable to heat the powder raw materials to similar temperatures. Therefore, the temperature of the hot gas discharged upward from the powder separators C 14 and C 24 at the lowest stage of each preheating device is also approximately the same, so the amount of hot gas passing through each preheating device is By adjusting the amount of powder raw material supplied to each preheating device in approximately proportion to , it is possible to preheat the powder raw material discharged from the powder separators C 13 and C 23 in the second stage from the bottom of each preheating device to the same degree. . For this reason, the top powder separator
Since the gas temperatures discharged from C 11 and C 21 are also about the same, each preheating device can have approximately the same temperature distribution, and favorable temperature conditions in terms of thermal efficiency and operability are achieved.
第２図は第２実施例を示し、上記第１実施例に
おける排ガス系統予熱装置３の下から２段目の粉
末分離器C13の粉末排出口と、排ガス系統予熱装
置３の最下段の粉末分離器C14のガス導入口との
間で、この粉末分離器C14のガス導入口側ガスダ
クト７ａに他の仮焼炉１８が介設され、この仮焼
炉１８に冷却装置２からの排出空気を供給する排
出空気ダクト１９が接続されると共に、この仮焼
炉１８に独立した燃料供給装置２０が設けられ
る。 FIG. 2 shows a second embodiment, in which the powder discharge port of the powder separator C 13 at the second stage from the bottom of the exhaust gas system preheating device 3 in the first embodiment and the powder at the lowest stage of the exhaust gas system preheating device 3 are shown. Another calciner 18 is interposed in the gas duct 7a on the gas inlet side of the powder separator C14 between the gas inlet of the separator C14 , and the discharge from the cooling device 2 is connected to the calciner 18. An exhaust air duct 19 for supplying air is connected, and an independent fuel supply device 20 is provided to this calciner 18 .
本構成によれば、排ガス系統予熱装置３での仮
焼量を増やせるので通過熱ガス量も相対的に増
え、燃焼ガス系統予熱装置４の通過熱ガス量を逆
に減少させることができる。 According to this configuration, since the amount of calcination in the exhaust gas system preheating device 3 can be increased, the amount of passing hot gas can also be relatively increased, and the amount of hot gas passing through the combustion gas system preheating device 4 can be decreased.
なお、以上は図示の例によるが、排ガス系統予
熱装置３の最下段に供給する燃料量に応じて、第
１実施例の如く最下段の粉末分離器C14のガス導
入口側ガスダクト７ａに燃料供給装置２０を設け
たり、或いは第２実施例の如くこのガスダクト７
ａに仮焼炉１８を設けてもよい。また、上記排ガ
ス系統予熱装置３における仮焼炉１８への冷却装
置２からの排出空気ダクト１９の設置は必須のも
のではない。 Although the above is based on the illustrated example, depending on the amount of fuel supplied to the lowest stage of the exhaust gas system preheating device 3, fuel is supplied to the gas inlet side gas duct 7a of the lowest stage powder separator C14 as in the first embodiment. A supply device 20 may be provided, or this gas duct 7 may be provided as in the second embodiment.
A calcining furnace 18 may be provided in a. Further, the installation of the exhaust air duct 19 from the cooling device 2 to the calciner 18 in the exhaust gas system preheating device 3 is not essential.
また、排ガス系統予熱装置３及び燃焼ガス系統
予熱装置４の各系統を構成する予熱装置の系列
数、或いは各予熱装置を構成する粉末分離器の種
類や段数、仮焼炉の種類等は上記実施例に限定さ
れるものではない。 In addition, the number of series of preheating devices constituting each system of the exhaust gas system preheating device 3 and the combustion gas system preheating device 4, the type and number of stages of powder separators constituting each preheating device, the type of calcining furnace, etc. are determined according to the above implementation. The examples are not limited.
（発明の効果）
この発明によれば、排ガス系統予熱装置の最下
段の粉末分離器のガス導入口側に独立した燃料供
給装置を備え、かつ、同予熱装置の下から２段目
の粉末分離器から排出される予熱原料の一部を燃
焼ガス系統予熱装置の仮焼炉側に供給するように
したため、この燃料供給装置から供給する燃料の
調整により、排ガス系統予熱装置の最下段に投入
される粉末原料は最下段の粉末分離器のガス導入
口に至る間で高度に仮焼される。(Effects of the Invention) According to the present invention, an independent fuel supply device is provided on the gas inlet side of the powder separator at the lowest stage of the exhaust gas system preheating device, and the powder separator at the second stage from the bottom of the preheating device is provided with an independent fuel supply device. A part of the preheated raw material discharged from the combustion chamber is supplied to the calciner side of the combustion gas system preheating device, so by adjusting the fuel supplied from this fuel supply device, it is fed into the lowest stage of the exhaust gas system preheating device. The powdered raw material is highly calcined before reaching the gas inlet of the powder separator at the lowest stage.
一方、燃焼ガス系統予熱装置に投入される粉末
原料もこの装置における仮焼炉で高度に仮焼され
る。 On the other hand, the powder raw material fed into the combustion gas system preheating device is also highly calcined in the calcining furnace of this device.
この際、排ガス系統予熱装置に燃料供給装置が
設けられたため、焼成炉からの燃焼ガス量にこの
燃料供給装置による燃焼ガス量が加わることにな
り、排ガス系統予熱装置を通過する熱ガス量が増
加する。同時に、排ガス系統予熱装置の下から２
段目の粉末分離器から最下段の粉末分離器のガス
導入口側ガスダクトへ排出される粉末原料を増加
してもこれを仮焼できる。従つて、排ガス系統予
熱装置で仮焼量を増加した分だけ、燃焼ガス系統
予熱装置の仮焼炉へ分岐供給する粉末原料を減少
でき、同仮焼炉で仮焼に必要な熱量も減少する。
従つて、燃焼ガス系統予熱装置を通過する熱ガス
が減少し、この燃焼ガス系統予熱装置と上記排ガ
ス系統予熱装置とを通過する熱ガス量のバランス
を改善することができる。よつて、上記排ガス系
統予熱装置と燃焼ガス系統予熱装置との間で良好
な設備的バランスが得られる。 At this time, since a fuel supply device was installed in the exhaust gas system preheating device, the amount of combustion gas from this fuel supply device was added to the amount of combustion gas from the firing furnace, increasing the amount of hot gas passing through the exhaust gas system preheating device. do. At the same time, 2 from the bottom of the exhaust gas system preheating device.
Even if the amount of powder raw material discharged from the powder separator in the first stage to the gas duct on the gas inlet side of the powder separator in the lowest stage is increased, it can be calcined. Therefore, by increasing the amount of calcination in the exhaust gas system preheating device, it is possible to reduce the powder raw material branched and supplied to the calcination furnace of the combustion gas system preheating device, and the amount of heat required for calcination in the calcination furnace is also reduced. .
Therefore, the amount of hot gas passing through the combustion gas system preheating device is reduced, and the balance between the amount of hot gas passing through the combustion gas system preheating device and the exhaust gas system preheating device can be improved. Therefore, a good equipment balance can be obtained between the exhaust gas system preheating device and the combustion gas system preheating device.
また、排ガス系統予熱装置の下から２段目の粉
末分離器の粉末排出口を燃焼ガス系統予熱装置の
仮焼炉側に連結したため、排ガス系統予熱装置で
の上記仮焼に利用しうる熱量と予熱に利用しうる
熱量とのバランスが得られる。 In addition, because the powder discharge port of the second-stage powder separator from the bottom of the exhaust gas system preheating device was connected to the calcination furnace side of the combustion gas system preheating device, the amount of heat that could be used for the above calcination in the exhaust gas system preheating device A balance can be obtained with the amount of heat that can be used for preheating.
以上のように、この発明では、排ガス系統予熱
装置から燃焼ガス系統予熱装置へ分岐供給する予
熱原料の量、及び両予熱装置に供給する燃料の量
を調節することにより、両予熱装置間の設備的及
び熱的バランスをとりつつ粉末原料の仮焼を高度
に行うことができる。 As described above, in this invention, by adjusting the amount of preheating raw material branched and supplied from the exhaust gas system preheating device to the combustion gas system preheating device and the amount of fuel supplied to both preheating devices, the equipment between the two preheating devices is adjusted. Powder raw materials can be calcined to a high degree while maintaining a good thermal and thermal balance.
第１図及び第２図はこの発明の実施例を示し、
第１図は第１実施例でセメント原料焼成装置の系
統図、第２図は第２実施例を示し第１図に相当す
る図、第３図及び第４図は従来例を示し、第３図
は第１従来例で第１図に相当する図、第４図は第
２従来例で同第１図に相当する図である。
１……焼成炉、２……冷却装置、３……排ガス
系統予熱装置、４……燃焼ガス系統予熱装置、７
ａ……ガスダクト、８……仮焼炉、１０……燃料
供給装置、１３……原料シユート、１４……原料
シユート、１５……分岐シユート、１８……仮焼
炉、２０……燃料供給装置、C11〜C14，C21〜C24
……粉末分離器。
1 and 2 show an embodiment of this invention,
Fig. 1 is a system diagram of the cement raw material firing apparatus according to the first embodiment, Fig. 2 is a diagram corresponding to Fig. 1 showing the second embodiment, Figs. 3 and 4 show the conventional example, and Fig. The figure shows a first conventional example, which corresponds to FIG. 1, and FIG. 4 shows a second conventional example, which corresponds to FIG. 1. 1... Firing furnace, 2... Cooling device, 3... Exhaust gas system preheating device, 4... Combustion gas system preheating device, 7
a... Gas duct, 8... Calciner, 10... Fuel supply device, 13... Raw material chute, 14... Raw material chute, 15... Branch chute, 18... Calciner, 20... Fuel supply device , C11 ~ C14 , C21 ~ C24
...Powder separator.
Claims (1)
ら排出される焼成物を空気流で冷却する冷却装置
と、上記焼成炉からの排ガスで粉末原料を予熱す
る排ガス系統予熱装置と、上記冷却装置からの排
出空気を用いて燃料を燃焼させてこの燃焼ガスで
粉末原料を予熱する燃焼ガス系統予熱装置とを設
け、上記各予熱装置が上下方向に積重されて互い
に接続された複数の粉末分離器群をそれぞれ有
し、各予熱装置の最下段の粉末分離器の粉末排出
口をそれぞれ焼成炉に連結し、一方、蒸気燃焼ガ
ス系統予熱装置の最下段に位置する粉末分離器の
ガス導入口とこの粉末分離器上方の他の粉末分離
器の粉末排出口との間に冷却装置からの排出空気
を用いて燃料を燃焼させて粉末原料を予熱する仮
焼炉を介設した粉末原料焼成装置において、上記
排ガス系統予熱装置の最下段の粉末分離器のガス
導入口側に独立した燃料供給装置を備え、排ガス
系統予熱装置の下から２段目の粉末分離器の粉末
排出口を燃焼ガス系統予熱装置の仮焼炉側に連結
したことを特徴とする複数系統型粉末原料予熱装
置。1. A firing furnace for firing the powder raw material, a cooling device for cooling the fired product discharged from the firing furnace with an air flow, an exhaust gas system preheating device for preheating the powder raw material with the exhaust gas from the firing furnace, and the above cooling device. A combustion gas system preheating device is provided to combust fuel using the exhaust air from the combustion gas system and preheat the powder raw material with the combustion gas, and each of the preheating devices is vertically stacked and connected to each other to form a plurality of powder separation systems. The powder discharge ports of the powder separators at the bottom of each preheating device are connected to the firing furnace, and the gas inlet of the powder separator located at the bottom of the steam combustion gas system preheating device is connected to the furnace. A powder raw material sintering device that has a calciner interposed between this powder separator and the powder discharge port of another powder separator above this powder separator to preheat the powder raw material by burning fuel using exhaust air from a cooling device. , an independent fuel supply device is provided on the gas inlet side of the powder separator at the lowest stage of the exhaust gas system preheating device, and the powder discharge port of the powder separator at the second stage from the bottom of the exhaust gas system preheating device is connected to the combustion gas system. A multi-system powder raw material preheating device characterized by being connected to the calcining furnace side of the preheating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20713585A JPS6270249A (en) | 1985-09-19 | 1985-09-19 | Plural-system type powdery stock material preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20713585A JPS6270249A (en) | 1985-09-19 | 1985-09-19 | Plural-system type powdery stock material preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6270249A JPS6270249A (en) | 1987-03-31 |
| JPH0432793B2 true JPH0432793B2 (en) | 1992-06-01 |
Family
ID=16534774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20713585A Granted JPS6270249A (en) | 1985-09-19 | 1985-09-19 | Plural-system type powdery stock material preheater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6270249A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52136219A (en) * | 1976-05-12 | 1977-11-14 | Ishikawajima Harima Heavy Ind | Method of baking raw materials for cement and apparatus for carrying out thereof |
| JPS5838374A (en) * | 1981-08-28 | 1983-03-05 | Mitsubishi Electric Corp | Controlling apparatus for transmission with direct coupled clutch |
-
1985
- 1985-09-19 JP JP20713585A patent/JPS6270249A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6270249A (en) | 1987-03-31 |
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