JPH0243694B2 - HAINETSUBOIRAOFUZOKUSHITASEMENTOGENRYOFUNMATSUYONETSUSOCHI - Google Patents
HAINETSUBOIRAOFUZOKUSHITASEMENTOGENRYOFUNMATSUYONETSUSOCHIInfo
- Publication number
- JPH0243694B2 JPH0243694B2 JP17048482A JP17048482A JPH0243694B2 JP H0243694 B2 JPH0243694 B2 JP H0243694B2 JP 17048482 A JP17048482 A JP 17048482A JP 17048482 A JP17048482 A JP 17048482A JP H0243694 B2 JPH0243694 B2 JP H0243694B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- heat exchange
- material powder
- preheating device
- exhaust gas
- 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
- 239000007789 gas Substances 0.000 claims description 54
- 239000002994 raw material Substances 0.000 claims description 52
- 239000000843 powder Substances 0.000 claims description 43
- 239000002918 waste heat Substances 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000001354 calcination Methods 0.000 description 13
- 238000010304 firing Methods 0.000 description 13
- 239000000446 fuel Substances 0.000 description 11
- 238000010248 power generation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003245 coal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/001—Calcining
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Details (AREA)
Description
【発明の詳細な説明】
本発明は、セメント原料を焼成処理する装置に
付設される浮遊式予熱装置、例えばサイクロンタ
イプの千段式予熱装置において排ガス顕熱を発電
用ボイラで効率良く回収利用することのできる装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention efficiently recovers and utilizes exhaust gas sensible heat in a power generation boiler in a floating preheating device, such as a cyclone type thousand-stage preheating device, attached to a device for firing cement raw materials. It is related to a device that can do this.
第１図は、セメント原料を予熱・焼成するとき
に用いられる装置の一例を示すもので、この装置
は主として原料粉末捕集器としてのサイクロン
C1〜C3、分離サイクロンC4並びに最下位の熱交
換段を構成する燃焼装置付の仮焼炉２を上下方向
に配列してなる予熱装置１、焼成炉３及びクリン
カー冷却機４より構成される。 Figure 1 shows an example of equipment used when preheating and firing cement raw materials.This equipment is mainly used as a cyclone as a raw material powder collector.
C 1 to C 3 , separation cyclone C 4 , and a preheating device 1 formed by vertically arranging a calcining furnace 2 with a combustion device that constitutes the lowest heat exchange stage, a calcining furnace 3, and a clinker cooler 4. be done.
スクリユーコンベア等の供給装置５ａによつて
送られてきた原料粉末Ａは、供給機５ｂの原料排
出シユートを通してダクト７ａに送られ、ダクト
７ａ内の上昇気流と共に最上段のサイクロンC1
へ送られる。そしてサイクロンC1，C2，C3及び
原料シユート８ａ，８ｂ，８ｃを経由しながら順
次降下し、その間ガスダクト７ａ，７ｂ，７ｃを
上昇する熱風によつて順次加熱され、バーナ６ａ
を備えた仮焼炉２に入つ仮焼された後ガスダクト
７ｄを通つて分離サイクロンC4に入り、次いで
原料シユート８ｄから焼成炉入口端覆１２を経て
焼成炉３へ導入される。 The raw material powder A sent by the feeder 5a such as a screw conveyor is sent to the duct 7a through the raw material discharge chute of the feeder 5b, and is sent to the top stage cyclone C1 along with the upward airflow in the duct 7a.
sent to. Then, it descends sequentially via cyclones C 1 , C 2 , C 3 and raw material chute 8 a , 8 b , 8 c , and is heated sequentially by hot air rising through gas ducts 7 a , 7 b , 7 c , and is heated by burner 6 a .
After being calcined, the raw material enters the calcining furnace 2 equipped with a gas duct 7d, enters the separation cyclone C4 , and is then introduced into the calcining furnace 3 from the raw material chute 8d through the calcining furnace inlet end cover 12.
焼成炉３には冷却機４からの高温空気とバーナ
６ｂからの焼成用燃料が導入されており、高温下
で焼成を受けたクリンカーはクリンカー冷却機４
に入つて冷却され、更にクリンカーコンベア１１
によつて搬出される。尚９は余剰空気誘引通風
機、１０は押込送風機、１３は抽気ダクト、１４
は排ガス誘引通風機、１５は排ガスダクトを夫々
示す。 High-temperature air from the cooler 4 and firing fuel from the burner 6b are introduced into the firing furnace 3, and the clinker that has been fired at high temperature is passed through the clinker cooler 4.
The clinker conveyor 11
It is carried out by. In addition, 9 is a surplus air induction ventilation fan, 10 is a forced air blower, 13 is an air bleed duct, and 14
15 indicates an exhaust gas induced draft fan, and 15 indicates an exhaust gas duct.
この様な焼成装置における予熱装置１の最上段
サイクロンC1から排出される排ガスの温度は、
予熱装置１の熱交換方式にもよるが図示の４段熱
交換の場合において通常350〜400℃程度であり、
未だ相当の熱エネルギーが残されている。そこで
この排ガス顕熱を更に有効利用する為、第１図に
示した如く排ガスダクト１５の途中にボイラ１６
等の排熱利用設備としてのボイラ１６を設置し、
高温排ガスとの熱交換により蒸気を発生させてこ
れを発電に利用することにより熱経済性の向上を
図つている。尚ボイラ１６の水管が破損した場合
等に対処する為、ボイラ１６を迂回するバイパス
ダクト１７を設けると共に、ダクト本管１５にダ
ンパ１８ａ、バイパスダクト１７にダンパ１８ｂ
を設け、これらの開閉操作によつて焼成装置の運
転を継続して行なうことができる様にしている。 The temperature of the exhaust gas discharged from the uppermost cyclone C1 of the preheating device 1 in such a baking device is:
Although it depends on the heat exchange method of the preheating device 1, the temperature is usually about 350 to 400°C in the case of the four-stage heat exchange shown in the figure.
There is still considerable heat energy left. Therefore, in order to use this exhaust gas sensible heat more effectively, a boiler 16 is installed in the middle of the exhaust gas duct 15 as shown in FIG.
A boiler 16 is installed as waste heat utilization equipment such as
The thermal economy is improved by generating steam through heat exchange with high-temperature exhaust gas and using it for power generation. In addition, in order to deal with cases where the water pipe of the boiler 16 is damaged, a bypass duct 17 is provided to bypass the boiler 16, and a damper 18a is installed in the duct main pipe 15, and a damper 18b is installed in the bypass duct 17.
are provided so that the firing apparatus can be continuously operated by opening and closing these operations.
ところがこの様な従来の排熱利用設備では、排
ガスダクト１５内の排ガス温度がそれ程高温でな
い為、ボイラ１６における発生蒸気の温度及び圧
力が充分に上がらず、タービンでの発電効率が低
い。しかも予熱装置１の排ガスは一般に原料乾燥
用としても使用されるので、その余剰分しかボイ
ラ１６での加熱に利用することができず、結局利
用可能なガス顕熱が不足して発電用タービンの効
率が十分に高いものとなつていない。 However, in such conventional waste heat utilization equipment, since the temperature of the exhaust gas in the exhaust gas duct 15 is not so high, the temperature and pressure of the generated steam in the boiler 16 cannot rise sufficiently, and the power generation efficiency in the turbine is low. Moreover, since the exhaust gas from the preheating device 1 is generally used for drying raw materials, only the surplus can be used for heating in the boiler 16, and as a result, the usable sensible heat of the gas becomes insufficient and the power generation turbine is heated. Efficiency is not high enough.
こうした熱量不足を補う方法として、排ガスダ
クト１５の適所に燃焼室を設け、燃料及び燃焼用
空気を供給して排ガス温度を高めることも考えら
れるが、焼成炉や仮焼炉以外に燃焼部を設けるの
は、設備的にも操業的にも好ましいことではな
い。しかも燃料として安価な石炭を利用する場合
は、燃焼室で発生する燃焼残灰の処理が厄介にな
る。 As a way to compensate for this lack of heat, it is possible to provide a combustion chamber at a suitable location in the exhaust gas duct 15 and increase the exhaust gas temperature by supplying fuel and combustion air. This is not desirable in terms of equipment or operation. Moreover, when cheap coal is used as fuel, it becomes difficult to dispose of combustion residual ash generated in the combustion chamber.
本発明者は上記の様な事情に着目し、排ガス顕
熱の不足を予熱装置への原料粉末送給機構の改善
によつて捕い、予熱装置に付属の排熱ボイラでの
熱利用効率を高めるべく研究を行つた。本発明は
こうした研究の結果完成されたものであつて、そ
の構成は、第１図に示した如く原料粉末捕集器、
ガスダクト及び原料シユートより構成される千段
の熱交換ユニツトを上下方向に連接して構成され
る予熱装置の排ガスラインに排熱ボイラを付属し
てなるセメント原料粉末予熱装置において、当該
予熱装置から前記排熱ボイラへ導入する排ガス温
度を高めるために、原料粉末供給機の原料排出シ
ユートを、少なくとも最上段の熱交換ユニツトを
含む複数個の熱交換ユニツトに接続してなるとこ
ろに要旨が存在する。 The present inventor focused on the above-mentioned circumstances and addressed the lack of exhaust gas sensible heat by improving the raw material powder feeding mechanism to the preheating device, and improved the heat utilization efficiency of the waste heat boiler attached to the preheating device. I conducted research to improve it. The present invention was completed as a result of such research, and its configuration consists of a raw material powder collector, as shown in FIG.
In a cement raw material powder preheating device which is constructed by vertically connecting a thousand stages of heat exchange units each consisting of a gas duct and a raw material chute, and an exhaust heat boiler is attached to the exhaust gas line of the preheating device, the The gist is that the raw material discharge chute of the raw material powder feeder is connected to a plurality of heat exchange units, including at least the uppermost heat exchange unit, in order to increase the temperature of the exhaust gas introduced into the waste heat boiler.
以下実施例を示す図面に基づいて本発明の構成
及び作用効果を説明するが、下記は代表例であつ
て本発明を限定する性質のものではなく、熱交換
ユニツトの種類、構造等はもとより、排熱ボイラ
の具体的な構成等を必要に応じて適宜変更するこ
とはすべて本発明の技術的範囲に含まれる。 The configuration and effects of the present invention will be explained below based on the drawings showing examples, but the following are representative examples and do not limit the present invention. It is within the technical scope of the present invention to change the specific configuration of the waste heat boiler as necessary.
第２図は本発明の実施例を示す概略説明図であ
り、全体的な構成は第１図に準じて理解すればよ
い。本例における特徴的な部分は、供給装置５ａ
により搬送する原料粉末Ａを供給機５ｂ及び５ｃ
から分割して予熱装置１へ供給する様に構成した
ところにあり、一部の原料粉末Ａは従来通り最上
段の熱交換ユニツトを構成するガスダクト７ａへ
送り他の一部は最上段の熱交換ユニツトを飛ばし
て次段の熱交換ユニツトを構成するガスダクト７
ｂへ短絡して送る。その結果、最上段の熱交換ユ
ニツトへ供給する原料粉末の減少分に相当して予
熱装置１における熱効率が低下し、この結果最終
的に予熱装置１から排出される排ガス温度が上昇
し、ボイラ１６での回収熱が大巾に増加すると同
時に、発生蒸気の温度及び圧力が高くなるのでタ
ービンでの発電効率が著しく改善される。この
際、排ガス温度は供給機５ｂ，５ｃから供給する
原料粉末の分配比によつて変わり、ガスダクト７
ａへの供給量比を高めれば排ガス温度は降下し、
反対にガスダクト７ｂへの供給量比を高めれば排
ガス温度は上昇する。従つてボイラ１６を効率良
く作動させるのに必要な温度に応じて供給機５
ｂ，５ｃへの分配比を変えることにより、排ガス
温度を調整することができる。しかも第２図に示
した様に、排ガスダクト１５の適所に温度検出器
１９を取付けると共に、供給機５ｃあるいは５ｂ
の一方又は両方に供給量調整装置２０を設けて該
装置２０を制御装置２１に電気的に接続し、上記
温度検出器１９による検出温度が所定値となる様
に供給機５ｃ又は５ｂの供給量調整装置２０を制
御すれば、焼成装置の操業状態が変動した場合で
も排ガス温度を可及的一定に維持することができ
る。その結果ボイラ１６へ供給される熱量が一定
となつてその稼動状態が安定化し、発電装置では
常に一定の電力を得られる様になる。又必要に応
じて発電量の設定を調節することができ、更に最
上段の熱交換ユニツト以外へ原料粉末の一部を直
接供給することによる焼成装置での燃料使用量の
増加を最少に抑えることができる。尚温度検出器
１９は排ガスダクト１５に設置してボイラ１６へ
導入するガス温度を検出することの他、予熱装置
１の最上段熱交換ユニツトを構成するサイクロン
C1内又は同ガスダクト７ａ内におけるガス−原
料粉末混相流の温度や、第３図に示す如くサイク
ロンC1に接続した原料シユート８ａ内の原料温
度で代用することもできる。 FIG. 2 is a schematic explanatory diagram showing an embodiment of the present invention, and the overall configuration can be understood based on FIG. 1. The characteristic part in this example is the supply device 5a.
The raw material powder A conveyed by the feeders 5b and 5c
The raw material powder A is divided and supplied to the preheating device 1, and part of the raw powder A is sent to the gas duct 7a that constitutes the uppermost heat exchange unit as before, and the other part is supplied to the uppermost heat exchange unit. Gas duct 7 that skips the unit and configures the next stage heat exchange unit
Short-circuit and send to b. As a result, the thermal efficiency in the preheating device 1 decreases corresponding to the decrease in the raw material powder supplied to the heat exchange unit at the top stage, and as a result, the temperature of the exhaust gas finally discharged from the preheating device 1 increases, and the boiler 16 At the same time, the temperature and pressure of the generated steam are increased, which significantly improves the power generation efficiency of the turbine. At this time, the exhaust gas temperature changes depending on the distribution ratio of the raw material powder supplied from the supply devices 5b and 5c, and
If the supply ratio to a is increased, the exhaust gas temperature will decrease,
On the other hand, if the ratio of the amount of gas supplied to the gas duct 7b is increased, the exhaust gas temperature will rise. Therefore, the feeder 5 is adjusted depending on the temperature required to efficiently operate the boiler 16.
By changing the distribution ratio to b and 5c, the exhaust gas temperature can be adjusted. Moreover, as shown in FIG.
A supply amount adjustment device 20 is provided in one or both of the devices, and the device 20 is electrically connected to a control device 21, and the supply amount of the feeder 5c or 5b is adjusted so that the temperature detected by the temperature detector 19 becomes a predetermined value. By controlling the adjustment device 20, the exhaust gas temperature can be maintained as constant as possible even when the operating state of the firing device changes. As a result, the amount of heat supplied to the boiler 16 becomes constant, its operating condition becomes stable, and the power generator can always obtain constant electric power. In addition, the setting of the amount of power generation can be adjusted as necessary, and furthermore, the increase in the amount of fuel used in the sintering device can be minimized by directly supplying a portion of the raw material powder to areas other than the uppermost heat exchange unit. Can be done. The temperature detector 19 is installed in the exhaust gas duct 15 to detect the temperature of the gas introduced into the boiler 16, and also to detect the temperature of the gas introduced into the boiler 16.
The temperature of the gas-raw material powder mixed phase flow in C 1 or the same gas duct 7a, or the temperature of the raw material in the raw material chute 8a connected to the cyclone C 1 as shown in FIG. 3 can also be used instead.
尚上記では原料粉末Ａを最上段の熱交換ユニツ
トを構成するガストダクト７ａと次段のガスダク
ト７ｂとに分配して供給する例を示したが、後者
については第３段目以降の熱交換ユニツトへ分配
して供給したり、あるいは最下段の仮焼炉２や焼
成炉３へ直接供給することもできる。また分配し
た原料粉末の供給投入位置は各ガスダクト部に限
定される訳ではなく、熱交換ユニツトの原料排出
用シユート８ａ，８ｂ…へ供給したり、あるいは
第３図に要部を示す様にサイクロンC2，C3…へ
直接供給することもでき、この様な分配手段を複
数組合せて採用してもよい。 In the above example, the raw material powder A is distributed and supplied to the gas duct 7a constituting the uppermost heat exchange unit and the next stage gas duct 7b. Alternatively, it can be distributed and supplied to the lowermost calcination furnace 2 or firing furnace 3. Furthermore, the feeding position of the distributed raw material powder is not limited to each gas duct section, but may be fed to the raw material discharge chutes 8a, 8b, etc. of the heat exchange unit, or to a cyclone as shown in the main part in Fig. 3. It is also possible to supply directly to C 2 , C 3 . . . , or a combination of a plurality of such distribution means may be employed.
この様に本発明では、予熱装置への原料粉末供
給機を少なくとも２個併設し、１つの供給機から
は最上段の熱交換ユニツトへ原料粉末を送り、他
の供給機からは第２段目以降の熱交換ユニツト又
は焼成炉へ原料を送る様に構成することにより、
予熱装置１における原料粉末の予熱効率を若干犠
性にして排ガス温度を高めるものであり、それに
伴つて仮焼炉２又は焼成炉３における燃料使用量
を増加させる必要が生じる。しかしこの増加熱量
は、排ガス温度の上昇によるボイラ１６での熱回
収量の増加及び熱利用効率の向上のために利用さ
れるものであり、全体のエネルギー経済からすれ
ば従来例よりも相当改善される。しかし仮焼炉２
や焼成炉３で元々使用する燃料を増加するだけで
あるから、排ガスラインに燃料を供給する場合に
較べて設備的、操業的な負担が増加する恐れもな
い。加えて燃料として微粉炭等の固体燃料を使用
する場合でも、燃料により生ずる灰分は焼成装置
内でセメント原料の一部として消費されるので、
特別な灰処理設備も不要である。本発明の装置を
使用することによつて得られる更に他の利点とし
て、ボイラ１６等の水管への微粉末の付着抑制効
果が挙げられる。即ち従来例の様に最上段の熱交
換ユニツトへ原料粉末の全量を供給する場合に
は、サイクロンC1で捕捉しきれなかつた多量の
微粉が排ガスと共にボイラ１６方向へ送られ、こ
れが水管に付着して伝熱効率を低下させるが、本
発明装置の様に供給原料を第２段目以降の熱交換
ユニツトへ分配して供給すると、サイクロンC1
から排ガスと共に持ち出される微粉の量が減少
し、ボイラ１６の水管への付着及びそれに伴う伝
熱効率の低下が抑制されると共に、付着した微粉
を除去する為の蒸気ブロー等の処理頻度を少なく
することができる。 In this way, in the present invention, at least two raw material powder feeders are provided to the preheating device, one feeder sends the raw powder to the uppermost heat exchange unit, and the other feeders feed the raw material powder to the second stage heat exchange unit. By configuring the raw material to be sent to the subsequent heat exchange unit or firing furnace,
This increases the exhaust gas temperature by slightly sacrificing the preheating efficiency of the raw material powder in the preheating device 1, and accordingly, it becomes necessary to increase the amount of fuel used in the calcination furnace 2 or sintering furnace 3. However, this increased amount of heat is used to increase the amount of heat recovered in the boiler 16 due to the rise in exhaust gas temperature and to improve heat utilization efficiency, and from the overall energy economy perspective, this is a considerable improvement over the conventional example. Ru. However, calcining furnace 2
Since only the amount of fuel originally used in the firing furnace 3 is increased, there is no fear that the equipment and operational burden will increase compared to the case where fuel is supplied to the exhaust gas line. In addition, even when solid fuel such as pulverized coal is used as fuel, the ash produced by the fuel is consumed as part of the cement raw material in the calcination equipment.
Special ash handling equipment is also not required. Another advantage obtained by using the apparatus of the present invention is the effect of suppressing the adhesion of fine powder to water pipes such as the boiler 16. In other words, when the entire amount of raw powder is supplied to the heat exchange unit on the top stage as in the conventional example, a large amount of fine powder that cannot be captured by the cyclone C1 is sent along with the exhaust gas toward the boiler 16, and this adheres to the water pipes. However, if the feedstock is distributed and supplied to the second and subsequent heat exchange units as in the device of the present invention, the cyclone C 1
The amount of fine powder taken out with the exhaust gas from the boiler 16 is reduced, and adhesion to the water pipes of the boiler 16 and the accompanying decrease in heat transfer efficiency are suppressed, and the frequency of treatments such as steam blowing for removing the adhered fine powder is reduced. Can be done.
前述の様に最上段の熱交換ユニツト以外の熱交
換ユニツトへ原料粉末を分配供給する位置は種々
考えられるが、第２図に示した様に原料供給装置
５ａからの短絡シユートを第２段目の熱交換ユニ
ツトへ接続する場合には、必要に応じて原料粉末
の全量を第２段熱交換ユニツトへ供給することが
でき、この際最上段のサイクロンC1は粉末捕集
専用に使用されるためボイラ１６へ流入する原料
粉末量を最少に抑えることができる。この様な構
成になる一実施例において原料粉末の全量をガス
ダクト７ｂへ供給したとき、同じく全量をガスダ
クト７ａへ供給する従来例に較べて予熱装置１の
排ガス温度は約60℃上昇し、仮焼炉２における燃
料使用量の増加は１Kgクリンカー当り40kcal程度
であつた。 As mentioned above, there are various possible positions for distributing and supplying the raw material powder to the heat exchange units other than the top heat exchange unit, but as shown in FIG. When connecting to a second heat exchange unit, the entire amount of raw powder can be supplied to the second stage heat exchange unit if necessary, and in this case, the top stage cyclone C1 is used exclusively for powder collection. Therefore, the amount of raw material powder flowing into the boiler 16 can be minimized. In one embodiment with such a configuration, when the entire amount of raw material powder is supplied to the gas duct 7b, the exhaust gas temperature of the preheating device 1 rises by about 60°C compared to the conventional example where the entire amount is also supplied to the gas duct 7a, and the calcination occurs. The increase in fuel consumption in Furnace 2 was approximately 40 kcal per 1 kg of clinker.
尚本発明装置を使用するに当つては、図示した
如く予熱装置の最下段熱交換ユニツトを構成する
ガスダクトに燃焼装置を備えた仮焼炉２を接続
し、予熱装置１全体の温度変化を該仮焼炉２の操
業条件の調整によつて吸収し、焼成炉３の操業条
件を安定化するのが好ましいが、仮焼炉２を具備
しない通常タイプの予熱装置へ適用することも可
能である。また本発明装置ではボイラの熱利用効
率を高める為に、前述の如く予熱効率を犠性にし
て排ガス温度を高めるものであるから、ボイラを
稼動させない場合には、例えば第２図における供
給機５ｃを全閉、供給機５ｂを全開にして原料粉
末Ａの短絡供給を行わず、予熱装置１が最高の熱
効率を発揮する様にして使用する。 When using the device of the present invention, the calciner 2 equipped with a combustion device is connected to the gas duct constituting the lowermost stage heat exchange unit of the preheating device as shown in the figure, and the temperature change of the entire preheating device 1 is monitored. Although it is preferable to absorb this by adjusting the operating conditions of the calciner 2 and stabilize the operating conditions of the calciner 3, it is also possible to apply it to a normal type preheating device that does not include the calciner 2. . Furthermore, in order to increase the heat utilization efficiency of the boiler, the present invention device increases the exhaust gas temperature at the expense of preheating efficiency as described above, so when the boiler is not operated, for example, the feeder 5c in FIG. is fully closed, the feeder 5b is fully opened, and the raw powder A is not short-circuited, and the preheating device 1 is used so as to exhibit the highest thermal efficiency.
尚図では１基の焼成炉３に対して１系列の予熱
装置を組合せた例を示したが、この他１基の焼成
炉に対して２系列以上の予熱装置を併設してその
うちの少なくとも１系列に本発明の思想を適用
し、複数系列からの排ガスを合流させてボイラへ
導くこともでき、あるいは予熱装置へ供給する原
料粉末をクリンカー冷却機４の余剰空気を利用し
て予備加算する様な構成とすることも可能であ
り、これらの程度の設計変更はすべて本発明の技
術的範囲内の実施とみるべきである。 The figure shows an example in which one series of preheating devices is combined for one firing furnace 3, but in addition, two or more series of preheating devices are installed for one firing furnace, and at least one of them By applying the idea of the present invention to the series, the exhaust gas from multiple series can be combined and guided to the boiler, or the raw material powder to be supplied to the preheating device can be pre-added using the surplus air of the clinker cooler 4. It is also possible to adopt a different configuration, and all design changes of these degrees should be considered as implementations within the technical scope of the present invention.
本発明は概略以上の様に構成されるが、要は原
料粉末を、千段式予熱装置の最上段の熱交換ユニ
ツトと第２段目以降の熱交換ユニツトへ分配して
供給する構成とすることにより排ガス温度を高め
ることができ、それにより排熱利用設備への供給
熱量を増大させると共にその熱利用効率を大幅に
高め得ることになつた。そしてこの回収エネルギ
ー量の増加は、焼成炉等における燃料増加分を補
つて余りあるものであり、予熱・焼成及び排熱利
用設備全体としてのエネルギー経済性を大幅に高
めることができた。尚本発明装置の設計に当つて
は、原料粉末供給部に原料を分配して供給する機
構を付加するだけであるから、設備上の負担が極
めて軽微であると共に既存設備への適用も容易で
ある。 The present invention is generally configured as described above, but the essential point is that the raw material powder is distributed and supplied to the uppermost heat exchange unit and the second and subsequent heat exchange units of the 1,000-stage preheating device. This makes it possible to raise the exhaust gas temperature, thereby increasing the amount of heat supplied to the exhaust heat utilization equipment and significantly increasing its heat utilization efficiency. This increase in the amount of recovered energy more than compensated for the increase in fuel used in the firing furnace, etc., and the energy economy of the entire preheating, firing, and waste heat utilization equipment was significantly improved. In designing the device of the present invention, only a mechanism for distributing and supplying the raw material is added to the raw material powder supply section, so the load on the equipment is extremely light and it can be easily applied to existing equipment. be.
第１図は公知の原料粉末予熱・焼成及び排熱利
用設備を示す概略説明図、第２図は本発明の実施
例を示す概略説明図、第３図は本発明の他の実施
例を示す要部説明図である。
１……予熱装置、２……仮焼炉、C1〜C4……
原料粉末捕集器、３……焼成炉、４……クリンカ
ー冷却機、５……原料供給装置、７……ガスダク
ト、８……原料シユート、１５……排ガスダク
ト、１６……排熱利用設備、Ａ……原料粉末。
Fig. 1 is a schematic explanatory diagram showing a known raw material powder preheating/calcination and exhaust heat utilization equipment, Fig. 2 is a schematic explanatory diagram showing an embodiment of the present invention, and Fig. 3 is a schematic explanatory diagram showing another embodiment of the present invention. It is a main part explanatory diagram. 1...Preheating device, 2...Calcination furnace, C1 to C4 ...
Raw material powder collector, 3... Calcination furnace, 4... Clinker cooler, 5... Raw material supply device, 7... Gas duct, 8... Raw material chute, 15... Exhaust gas duct, 16... Exhaust heat utilization equipment , A... Raw material powder.
Claims (1)
トより構成される４段の熱交換ユニツトを上下方
向に連接して構成される予熱装置の排ガスライン
に排熱ボイラを付属してなるセメント原料粉末予
熱装置において、当該予熱装置から前記排熱ボイ
ラへ導入する排ガス温度を高めるために、原料粉
末供給機の原料排出シユートを、少なくとも最上
段の熱交換ユニツトを含む複数段の熱交換ユニツ
トに接続してなることを特徴とする排熱ボイラを
付属したセメント原料粉末予熱装置。 ２ 特許請求の範囲第１項において、原料粉末供
給機の原料排出シユートを最上段の熱交換ユニツ
トと次段の熱交換ユニツトに接続してなるセメン
ト原料粉末予熱装置。 ３ 特許請求の範囲第１又は２項において、最下
段の熱交換ユニツトを構成するガスダクトに、燃
焼装置を備えた仮焼炉を接続してなるセメント原
料粉末予熱装置。[Scope of Claims] 1. A waste heat boiler is attached to the exhaust gas line of a preheating device which is constructed by vertically connecting a four-stage heat exchange unit consisting of a raw material powder collector, a gas duct, and a raw material chute. In the cement raw material powder preheating device, in order to increase the temperature of the exhaust gas introduced from the preheating device to the waste heat boiler, the raw material discharge chute of the raw material powder feeder is connected to a plurality of heat exchange stages including at least the uppermost heat exchange unit. A cement raw powder preheating device that is equipped with a waste heat boiler that is connected to the unit. 2. The cement raw material powder preheating device according to claim 1, wherein the raw material discharge chute of the raw material powder feeder is connected to the uppermost heat exchange unit and the next stage heat exchange unit. 3. A cement raw material powder preheating device according to claim 1 or 2, comprising a calciner equipped with a combustion device connected to a gas duct constituting the lowest heat exchange unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17048482A JPH0243694B2 (en) | 1982-09-28 | 1982-09-28 | HAINETSUBOIRAOFUZOKUSHITASEMENTOGENRYOFUNMATSUYONETSUSOCHI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17048482A JPH0243694B2 (en) | 1982-09-28 | 1982-09-28 | HAINETSUBOIRAOFUZOKUSHITASEMENTOGENRYOFUNMATSUYONETSUSOCHI |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8664586A Division JPS6211538A (en) | 1986-04-15 | 1986-04-15 | Preheating apparatus for powdery raw material of cement provided with waste heat boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5959243A JPS5959243A (en) | 1984-04-05 |
| JPH0243694B2 true JPH0243694B2 (en) | 1990-10-01 |
Family
ID=15905801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17048482A Expired - Lifetime JPH0243694B2 (en) | 1982-09-28 | 1982-09-28 | HAINETSUBOIRAOFUZOKUSHITASEMENTOGENRYOFUNMATSUYONETSUSOCHI |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0243694B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61197452A (en) * | 1985-02-26 | 1986-09-01 | 三菱マテリアル株式会社 | Suspension preheater |
| JPH0755846B2 (en) * | 1986-05-29 | 1995-06-14 | 株式会社神戸製鋼所 | Powder raw material firing device |
| JPH0755847B2 (en) * | 1986-09-03 | 1995-06-14 | 株式会社神戸製鋼所 | Powder raw material firing device |
| JP2022148255A (en) * | 2021-03-24 | 2022-10-06 | 太平洋セメント株式会社 | Manufacturing system of cement clinker and manufacturing method of cement clinker |
| US12515985B2 (en) | 2020-12-17 | 2026-01-06 | Taiheiyo Cement Corporation | Cement clinker production system and cement clinker production method |
| JP7555867B2 (en) * | 2021-03-24 | 2024-09-25 | 太平洋セメント株式会社 | CEMENT CLINKER PRODUCTION SYSTEM AND CEMENT CLINKER PRODUCTION METHOD |
| JP7600011B2 (en) * | 2021-03-25 | 2024-12-16 | 太平洋セメント株式会社 | CEMENT CLINKER PRODUCTION SYSTEM AND CEMENT CLINKER PRODUCTION METHOD |
-
1982
- 1982-09-28 JP JP17048482A patent/JPH0243694B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5959243A (en) | 1984-04-05 |
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