JP3422044B2 - Rotary regenerative air preheater - Google Patents
Rotary regenerative air preheaterInfo
- Publication number
- JP3422044B2 JP3422044B2 JP14383693A JP14383693A JP3422044B2 JP 3422044 B2 JP3422044 B2 JP 3422044B2 JP 14383693 A JP14383693 A JP 14383693A JP 14383693 A JP14383693 A JP 14383693A JP 3422044 B2 JP3422044 B2 JP 3422044B2
- Authority
- JP
- Japan
- Prior art keywords
- duct
- gas
- air
- heat exchange
- exchange element
- 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 - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回転再生式空気予熱機
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary regenerative air preheater.
【０００２】[0002]
【従来の技術】一般に、ボイラプラントではボイラ排ガ
スの熱を回収して熱エネルギーの節減を図るため、回転
再生式空気予熱機が使用されている。2. Description of the Related Art Generally, a rotary regenerative air preheater is used in a boiler plant in order to recover heat of boiler exhaust gas and save heat energy.
【０００３】斯かる空気予熱機は図７〜１１に示され、
１は架台２上に支持された、筒状で且つ内部に多数の仕
切壁を有するステータ、３はステータ１内に配置され
た、多数の上下方向の貫通孔を有する熱交換エレメン
ト、５はステータ１中心部を貫通して上下へ延び回転自
在に支持される主軸、６ａは熱交換エレメント３の下方
に配置されて主軸５に取り付けられた、平面形状が蝶形
の一次空気入口側フード、６ｂは熱交換エレメント３の
下方に前記一次空気入口側フード６ａ外側を覆うように
該一次空気入口側フード６ａと一体に配置された、平面
形状が蝶形の二次空気入口側フード、７ａは熱交換エレ
メント３の上方に配置されて主軸５に取り付けられた、
平面形状が蝶形の一次空気出口側フード、７ｂは熱交換
エレメント３の上方に前記一次空気出口側フード７ａ外
側を覆うように該一次空気出口側フード７ａと一体に配
置された、平面形状が蝶形の二次空気出口側フード、８
は一次、二次空気入口側フード６ａ，６ｂ及び主軸５並
びに一次、二次空気出口側フード７ａ，７ｂを駆動する
駆動装置、９ａは一次空気１０ａを一次空気入口側フー
ド６ａへ送る一次空気入口ダクト、９ｂは二次空気１０
ｂを二次空気入口側フード６ｂへ送る二次空気入口ダク
ト、１１ａは一次空気出口側フード７ａからの予熱され
た一次空気１２ａをボイラへ送る一次空気出口ダクト、
１１ｂは二次空気出口側フード７ｂからの予熱された二
次空気１２ｂをボイラへ送る二次空気出口ダクト、１３
はボイラから排出された高温のガス１４を熱交換エレメ
ント３へ供給するガス入口ダクト、１５は熱交換エレメ
ント３を通過した低温のガス１６を排出するガス出口ダ
クトである。Such an air preheater is shown in FIGS.
Reference numeral 1 denotes a stator which is supported on a pedestal 2 and which is cylindrical and has a large number of partition walls inside. 3 is a heat exchange element which is arranged in the stator 1 and has a large number of vertical through holes. 1 a spindle extending vertically through a central portion and rotatably supported; 6a is a primary air inlet side hood 6a, which is arranged below the heat exchange element 3 and attached to the spindle 5; Is a secondary air inlet side hood having a butterfly shape in plan view, which is integrally arranged with the primary air inlet side hood 6a under the heat exchange element 3 so as to cover the outside of the primary air inlet side hood 6a. Arranged above the exchange element 3 and attached to the main shaft 5,
The primary air outlet side hood having a butterfly shape in plan view, 7b is arranged above the heat exchange element 3 so as to cover the outside of the primary air outlet side hood 7a, and is integrally arranged with the primary air outlet side hood 7a. Butterfly-shaped secondary air outlet hood, 8
Is a drive device for driving the primary and secondary air inlet side hoods 6a and 6b and the main shaft 5 and the primary and secondary air outlet side hoods 7a and 7b, and 9a is a primary air inlet for sending the primary air 10a to the primary air inlet side hood 6a. Duct, 9b is the secondary air 10
b is a secondary air inlet duct for sending the secondary air inlet side hood 6b, 11a is a primary air outlet duct for sending the preheated primary air 12a from the primary air outlet side hood 7a to the boiler,
Reference numeral 11b denotes a secondary air outlet duct for sending the preheated secondary air 12b from the secondary air outlet side hood 7b to the boiler, 13
Is a gas inlet duct for supplying the high temperature gas 14 discharged from the boiler to the heat exchange element 3, and 15 is a gas outlet duct for discharging the low temperature gas 16 passing through the heat exchange element 3.
【０００４】尚、図７及び図９中、１７ａはガス入口ダ
クト１３内部における一次空気出口ダクト１１ａの上部
に取り付けられ、ガス１４中に含まれる灰等が一次空気
出口ダクト１１ａ上部に堆積することを防止するための
堆積防止部材、１７ｂはガス入口ダクト１３内部におけ
る二次空気出口ダクト１１ｂの上部に取り付けられ、ガ
ス１４中に含まれる灰等が二次空気出口ダクト１１ｂ上
部に堆積することを防止するための堆積防止部材、１８
は二次空気入口ダクト９ｂをガス出口ダクト１５に固定
する支持部材、１９は一次空気入口ダクト９ａを二次空
気入口ダクト９ｂに固定する支持部材、２０は一次空気
入口側フード６ａと二次空気入口側フード６ｂを連結す
る連結部材、２１は一次空気入口側フード６ａを主軸５
に固定する固定部材、２２は二次空気出口ダクト１１ｂ
をガス入口ダクト１３に固定する支持部材、２３は一次
空気出口ダクト１１ａを二次空気出口ダクト１１ｂに固
定する支持部材、２４は一次空気出口側フード７ａと二
次空気出口側フード７ｂを連結する連結部材、２５は一
次空気出口側フード７ａを主軸５に固定する固定部材で
あり、又、図１１中、２６ａ，２６ｂは固定の一次、二
次空気出口ダクト１１ａ，１１ｂに対し一次、二次空気
出口側フード７ａ，７ｂを回転自在に接続するカラーシ
ール、２７は一次、二次空気出口側フード７ａ，７ｂの
下面に取り付けられるエキスパンションジョイント、２
８はエキスパンションジョイント２７の下面に取り付け
られるシーリングフレームである。7 and 9, reference numeral 17a is attached to the upper portion of the primary air outlet duct 11a inside the gas inlet duct 13 so that the ash contained in the gas 14 is deposited on the upper portion of the primary air outlet duct 11a. A deposition preventing member 17b for preventing the above is attached to the upper portion of the secondary air outlet duct 11b inside the gas inlet duct 13 so that ash contained in the gas 14 is deposited on the upper portion of the secondary air outlet duct 11b. Deposition prevention member for preventing, 18
Is a supporting member for fixing the secondary air inlet duct 9b to the gas outlet duct 15, 19 is a supporting member for fixing the primary air inlet duct 9a to the secondary air inlet duct 9b, and 20 is the primary air inlet side hood 6a and the secondary air. A connecting member for connecting the inlet side hood 6b, 21 is the primary air inlet side hood 6a for the main shaft 5
A fixing member for fixing to the secondary air outlet duct 11b
Is fixed to the gas inlet duct 13, 23 is a supporting member that fixes the primary air outlet duct 11a to the secondary air outlet duct 11b, and 24 connects the primary air outlet side hood 7a and the secondary air outlet side hood 7b. A connecting member, 25 is a fixing member for fixing the primary air outlet side hood 7a to the main shaft 5, and in FIG. 11, 26a and 26b are fixed primary and secondary with respect to the secondary air outlet ducts 11a and 11b. A collar seal that rotatably connects the air outlet side hoods 7a, 7b, 27 is an expansion joint attached to the lower surface of the primary and secondary air outlet side hoods 7a, 7b, 2
A sealing frame 8 is attached to the lower surface of the expansion joint 27.
【０００５】一次空気１０ａ並びに二次空気１０ｂを予
熱する場合には、駆動装置８によって一次、二次空気入
口側フード６ａ，６ｂ及び一次、二次空気出口側フード
７ａ，７ｂが水平方向へ回転させられ、高温のガス１４
はガス入口ダクト１３から二次空気出口側フード７ｂの
外側を通って熱交換エレメント３に導入され、熱交換エ
レメント３を加熱した後、二次空気入口側フード６ｂの
外側を通ってガス出口ダクト１５へ排出され、低温のガ
ス１６としてガス出口ダクト１５から下流側へ送られ
る。In the case of preheating the primary air 10a and the secondary air 10b, the drive device 8 horizontally rotates the primary and secondary air inlet side hoods 6a and 6b and the primary and secondary air outlet side hoods 7a and 7b. Made hot gas 14
Is introduced into the heat exchange element 3 from the gas inlet duct 13 through the outside of the secondary air outlet side hood 7b, heats the heat exchange element 3, and then passes through the outside of the secondary air inlet side hood 6b. 15 is discharged to the downstream side from the gas outlet duct 15 as the low temperature gas 16.
【０００６】一方、一次空気１０ａは一次空気入口ダク
ト９ａから一次空気入口側フード６ａ内を通って中心部
側の熱交換エレメント３へ導入され、該熱交換エレメン
ト３の熱により加熱されて一次空気出口側フード７ａ内
へ送出され、該一次空気出口側フード７ａ、一次空気出
口ダクト１１ａを通り、予熱された一次空気１２ａとし
てボイラへ送給され、又、これと同時に、二次空気１０
ｂは二次空気入口ダクト９ｂから二次空気入口側フード
６ｂ内を通って外周部側の熱交換エレメント３へ導入さ
れ、該熱交換エレメント３の熱により加熱されて二次空
気出口側フード７ｂ内へ送出され、該二次空気出口側フ
ード７ｂ、二次空気出口ダクト１１ｂを通り、予熱され
た二次空気１２ｂとしてボイラへ送給される。On the other hand, the primary air 10a is introduced from the primary air inlet duct 9a into the hood 6a on the primary air inlet side to the heat exchange element 3 on the central side, and is heated by the heat of the heat exchange element 3 to generate the primary air. It is delivered into the outlet side hood 7a, passes through the primary air outlet side hood 7a and the primary air outlet duct 11a, and is delivered to the boiler as preheated primary air 12a, and at the same time, the secondary air 10
b is introduced from the secondary air inlet duct 9b through the secondary air inlet side hood 6b to the heat exchange element 3 on the outer peripheral side, and is heated by the heat of the heat exchange element 3 to generate the secondary air outlet side hood 7b. The secondary air 12b is sent into the boiler, passes through the secondary air outlet side hood 7b and the secondary air outlet duct 11b, and is fed to the boiler as preheated secondary air 12b.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、前述の
如き従来の回転再生式空気予熱機では、図７及び図８に
示されるように、ガス入口ダクト１３内に一次、二次空
気出口ダクト１１ａ，１１ｂが不均等に配置されている
ことから、ガス入口ダクト１３内を流れる高温のガス１
４が前記一次、二次空気出口ダクト１１ａ，１１ｂの影
響を受け、図８中、ＡＢＣＤで示す部分のうち特にＤで
示す部分に流入しにくくなり、該熱交換エレメント３の
周方向に大きな温度差が生じるという問題を有してい
た。However, in the conventional rotary regeneration air preheater as described above, as shown in FIGS. 7 and 8, the primary and secondary air outlet ducts 11a, 11a, Due to the non-uniform arrangement of 11b, the hot gas 1 flowing in the gas inlet duct 13
4 is influenced by the primary and secondary air outlet ducts 11a and 11b, and it is difficult for the gas to flow into the portion indicated by ABCD in FIG. 8, particularly the portion indicated by D, and a large temperature in the circumferential direction of the heat exchange element 3. It had a problem that there was a difference.
【０００８】又、前記ガス入口ダクト１３内を流れる高
温のガス１４は、図９及び図１０に示されるように、熱
交換エレメント３の半径方向で見た場合にも、熱交換エ
レメント３の外周側に多く流れやすい反面、その中心部
には流入しにくくなり、熱交換エレメント３の半径方向
にも温度差が生じ、この場合、特に、一次空気１０ａの
予熱に悪影響を及ぼすという欠点があった。Further, as shown in FIGS. 9 and 10, the high temperature gas 14 flowing in the gas inlet duct 13 has an outer periphery of the heat exchange element 3 when viewed in the radial direction of the heat exchange element 3. Although it tends to flow a lot to the side, it becomes difficult to flow into the central portion thereof, and a temperature difference also occurs in the radial direction of the heat exchange element 3. In this case, in particular, there is a drawback that the preheating of the primary air 10a is adversely affected. .
【０００９】本発明は、斯かる実情に鑑み、ガス入口ダ
クトから熱交換エレメントへ流入する高温のガスの流れ
を均一化し得、熱交換エレメントの周方向並びに半径方
向における温度差を最小限に抑え得る回転再生式空気予
熱機を提供しようとするものである。In view of such circumstances, the present invention can make the flow of high temperature gas flowing from the gas inlet duct to the heat exchange element uniform, and minimize the temperature difference in the circumferential direction and the radial direction of the heat exchange element. The present invention seeks to provide a rotary regenerative air preheater.
【００１０】[0010]
【課題を解決するための手段】本発明は、内部に多数の
貫通孔を有する熱交換エレメントと、該熱交換エレメン
トへ高温のガスを供給するガス入口ダクトと、前記熱交
換エレメントを通過した低温のガスを排出するガス出口
ダクトと、前記熱交換エレメントの中心部を貫通して延
びる主軸と一緒に回転可能となるよう、前記ガス入口ダ
クトとガス出口ダクト内に熱交換エレメントを挟んで対
向配置された空気フードと、前記ガス入口ダクト内に配
置された空気フードに接続され、前記ガス入口ダクトの
中心部からガスダクト周壁側へ延び該ガスダクト周壁を
貫通して外部へ延びる空気ダクトと、前記ガス出口ダク
ト内に配置された空気フードに接続され、前記ガス出口
ダクトの中心部からガスダクト周壁側へ延び該ガスダク
ト周壁を貫通して外部へ延びる空気ダクトとを備えた回
転再生式空気予熱機において、前記ガス入口ダクトとガ
ス出口ダクト内に配置された空気フードに接続される空
気ダクトのうち少なくともガス入口ダクト内に配設され
る空気ダクトに、該空気ダクトと略同一外形形状を有し
且つ空気ダクトの前記ガスダクト周壁貫通部と反対方向
へ延びるダミーダクトを接続したことを特徴とする回転
再生式空気予熱機にかかるものである。SUMMARY OF THE INVENTION The present invention is directed to a heat exchange element having a large number of through holes therein, a gas inlet duct for supplying a high temperature gas to the heat exchange element, and a low temperature passage through the heat exchange element. The gas outlet duct for discharging the gas and the main shaft extending through the central portion of the heat exchange element are arranged to face each other with the heat exchange element sandwiched between the gas inlet duct and the gas outlet duct so as to be rotatable together. And an air duct connected to the air hood arranged in the gas inlet duct, extending from the center of the gas inlet duct to the gas duct peripheral wall side and extending to the outside through the gas duct peripheral wall, and the gas. It is connected to an air hood arranged in the outlet duct and extends from the center of the gas outlet duct to the gas duct peripheral wall side and penetrates the gas duct peripheral wall. In a rotary regenerative air preheater having an air duct extending to a portion, the air regenerator is disposed in at least a gas inlet duct among air ducts connected to an air hood disposed in the gas inlet duct and the gas outlet duct. A rotary regenerative air preheater characterized in that a dummy duct having substantially the same outer shape as the air duct and extending in a direction opposite to the gas duct peripheral wall penetrating portion of the air duct is connected to the air duct. .
【００１１】又、前記回転再生式空気予熱機において、
前記ガス入口ダクト内に配設された空気フード外側に、
高温のガスを熱交換エレメント中心部へ導くガイドベー
ンを取り付けるのが有効である。In the rotary regeneration type air preheater,
On the outside of the air hood arranged in the gas inlet duct,
It is effective to install a guide vane that guides the hot gas to the center of the heat exchange element.
【００１２】[0012]
【作用】従って、空気を予熱する場合には、空気フード
が水平方向へ回転させられ、高温のガスはガス入口ダク
トから空気フードの外側を通って熱交換エレメントに導
入されるが、この際、ガス入口ダクト内には空気ダクト
とダミーダクトが周方向に均等に配置されていることか
ら、ガス入口ダクト内を流れる高温のガスは、熱交換エ
レメントの周方向における特定の部分に流入しにくくな
ったり、或いは流入しやすくなったりすることがなくな
り、熱交換エレメントの周方向に大きな温度差が生じな
い。Therefore, when preheating the air, the air hood is rotated in the horizontal direction, and the hot gas is introduced from the gas inlet duct to the heat exchange element through the outside of the air hood. Since the air duct and the dummy duct are evenly arranged in the circumferential direction in the gas inlet duct, the hot gas flowing in the gas inlet duct is less likely to flow into a specific portion in the circumferential direction of the heat exchange element. It does not occur or the inflow becomes easy, and a large temperature difference does not occur in the circumferential direction of the heat exchange element.
【００１３】又、ガス入口ダクト内に配設された空気フ
ード外側に、高温のガスを熱交換エレメント中心部へ導
くガイドベーンを取り付ければ、高温のガスは熱交換エ
レメントの外周側だけでなく、その中心部にも流入しや
すくなり、熱交換エレメントの半径方向にも温度差が生
じなくなる。If a guide vane that guides the high temperature gas to the center of the heat exchange element is attached to the outside of the air hood provided in the gas inlet duct, the high temperature gas is not limited to the outer peripheral side of the heat exchange element. It also easily flows into the central portion of the heat exchange element, and a temperature difference does not occur in the radial direction of the heat exchange element.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面を参照しつつ説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１〜６は本発明の一実施例であって、図
中、図７〜１１と同一の符号を付した部分は同一物を表
わしており、基本的な構成は図７〜１１に示す従来のも
のと同様であるが、本実施例の特徴とするところは、図
１〜６に示す如く、ガス入口ダクト１３内に配置された
一次空気出口側フード７ａに接続される一次空気出口ダ
クト１１ａに、一次空気出口ダクト１１ａのガスダクト
周壁貫通部２９と反対方向へ延びるダミーダクト３０を
接続すると共に、ガス入口ダクト１３内に配置された二
次空気出口側フード７ｂに接続される二次空気出口ダク
ト１１ｂに、二次空気出口ダクト１１ｂのガスダクト周
壁貫通部３１と反対方向へ延びるダミーダクト３２を接
続し、更に、前記ガス入口ダクト１３内に配設された二
次空気出口側フード７ｂ外側に、高温のガス１４を熱交
換エレメント３中心部へ導くガイドベーン３３を取り付
けた点にある。1 to 6 show an embodiment of the present invention. In the drawings, the parts denoted by the same reference numerals as those in FIGS. 7 to 11 represent the same parts, and the basic structure is shown in FIGS. 1 is similar to the conventional one shown in FIG. 1, but the feature of the present embodiment is that, as shown in FIGS. 1 to 6, the primary air connected to the primary air outlet side hood 7a arranged in the gas inlet duct 13 is connected. A dummy duct 30 extending in a direction opposite to the gas duct peripheral wall penetrating portion 29 of the primary air outlet duct 11a is connected to the outlet duct 11a and a secondary air outlet side hood 7b arranged in the gas inlet duct 13 is connected. A dummy duct 32 extending in a direction opposite to the gas duct peripheral wall penetrating portion 31 of the secondary air outlet duct 11b is connected to the secondary air outlet duct 11b, and further, a secondary air outlet side fan disposed in the gas inlet duct 13 is connected. To 7b outwardly, in that fitted with guide vanes 33 for guiding the hot gas 14 to the heat exchange element 3 center.
【００１６】前記ダミーダクト３０の外形形状は、図６
に示す如く、上部に堆積防止部材１７ａが取り付けられ
た一次空気出口ダクト１１ａの外形形状（図１参照）と
略同一となるようにし、又、前記ダミーダクト３２の外
形形状は、図５に示す如く、上部に堆積防止部材１７ｂ
が取り付けられた二次空気出口ダクト１１ｂの外形形状
（図３参照）と略同一となるようにしてあるが、前記一
次、二次空気出口ダクト１１ａ，１１ｂ上部に堆積防止
部材１７ａ，１７ｂが取り付けられていないような場合
には、前記ダミーダクト３０，３２の外形形状を一次、
二次空気出口ダクト１１ａ，１１ｂと同様な形状（図示
の例では円形）とすればよいことは言うまでもない。The external shape of the dummy duct 30 is shown in FIG.
As shown in FIG. 5, the outer shape of the primary air outlet duct 11a having the deposition preventing member 17a attached thereto is substantially the same as that of the primary air outlet duct 11a (see FIG. 1), and the outer shape of the dummy duct 32 is shown in FIG. As shown in FIG.
The secondary air outlet duct 11b is attached to the secondary air outlet duct 11b to have substantially the same outer shape (see FIG. 3), but the deposition preventing members 17a and 17b are attached to the upper portions of the primary and secondary air outlet ducts 11a and 11b. If not, the outer shape of the dummy ducts 30 and 32 is changed to the primary shape,
It goes without saying that the secondary air outlet ducts 11a and 11b may have the same shape (circular in the illustrated example).
【００１７】前述の如く構成したので、一次空気１０ａ
並びに二次空気１０ｂを予熱する場合には、駆動装置８
によって一次、二次空気入口側フード６ａ，６ｂ及び一
次、二次空気出口側フード７ａ，７ｂが水平方向へ回転
させられ、高温のガス１４はガス入口ダクト１３から二
次空気出口側フード７ｂの外側を通って熱交換エレメン
ト３に導入されるが、この際、ガス入口ダクト１３内に
は一次、二次空気出口ダクト１１ａ，１１ｂとダミーダ
クト３０，３２が周方向に均等に配置されていることか
ら、ガス入口ダクト１３内を流れる高温のガス１４は、
熱交換エレメント３の周方向における特定の部分に流入
しにくくなったり、或いは流入しやすくなったりするこ
とがなくなり、図２中、ＡＢＣＤで示す部分に均等に流
入し、熱交換エレメント３の周方向に大きな温度差が生
じない。The primary air 10a is constructed as described above.
In addition, when preheating the secondary air 10b, the drive device 8
The primary and secondary air inlet side hoods 6a and 6b and the primary and secondary air outlet side hoods 7a and 7b are rotated in the horizontal direction, so that the high temperature gas 14 flows from the gas inlet duct 13 to the secondary air outlet side hood 7b. It is introduced into the heat exchange element 3 through the outside, and at this time, the primary and secondary air outlet ducts 11a and 11b and the dummy ducts 30 and 32 are evenly arranged in the circumferential direction in the gas inlet duct 13. Therefore, the high temperature gas 14 flowing in the gas inlet duct 13 is
It becomes difficult or difficult for the heat exchange element 3 to flow into a specific portion in the circumferential direction of the heat exchange element 3, and evenly flows into the portion indicated by ABCD in FIG. There is no large temperature difference.
【００１８】又、前記ガス入口ダクト１３内に配設され
た二次空気出口側フード７ｂ外側には、高温のガス１４
を熱交換エレメント３中心部へ導くガイドベーン３３を
取り付けてあるため、高温のガス１４は熱交換エレメン
ト３の外周側だけでなく、その中心部にも流入しやすく
なり、熱交換エレメント３の半径方向にも温度差が生じ
なくなり、一次空気１０ａの予熱も効率よく行われる。The high temperature gas 14 is provided outside the secondary air outlet side hood 7b disposed in the gas inlet duct 13.
Since the guide vanes 33 for guiding the heat exchange element 3 to the center of the heat exchange element 3 are attached, the high-temperature gas 14 is likely to flow not only to the outer peripheral side of the heat exchange element 3 but also to the center of the heat exchange element 3. The temperature difference does not occur in the directions, and the preheating of the primary air 10a is efficiently performed.
【００１９】こうして、ガス入口ダクト１３から熱交換
エレメント３へ流入する高温のガス１４の流れを均一化
し得、熱交換エレメント３の周方向並びに半径方向にお
ける温度差を最小限に抑えることが可能となる。In this way, the flow of the hot gas 14 flowing from the gas inlet duct 13 into the heat exchange element 3 can be made uniform, and the temperature difference in the circumferential direction and the radial direction of the heat exchange element 3 can be minimized. Become.
【００２０】尚、本発明の回転再生式空気予熱機は、上
述の実施例にのみ限定されるものではなく、必要に応じ
て、ガス出口ダクト１５内に配置された一次、二次空気
入口側フード６ａ，６ｂに接続される一次、二次空気入
口ダクト９ａ，９ｂに、図１及び図３中仮想線で示す如
く、一次、二次空気入口ダクト９ａ，９ｂと略同一外形
形状を有し且つ一次、二次空気入口ダクト９ａ，９ｂの
ガスダクト周壁貫通部３４，３５と反対方向へ延びるダ
ミーダクト３６，３７を接続してもよいこと、一次、二
次空気１０ａ，１０ｂに分割せずに空気の予熱を行う形
式の回転再生式空気予熱機にも適用可能なこと等、その
他、本発明の要旨を逸脱しない範囲内において種々変更
を加え得ることは勿論である。The rotary regenerative air preheater of the present invention is not limited to the above-mentioned embodiment, and if necessary, the primary and secondary air inlet sides arranged in the gas outlet duct 15 are provided. The primary and secondary air inlet ducts 9a and 9b connected to the hoods 6a and 6b have substantially the same outer shape as the primary and secondary air inlet ducts 9a and 9b, as shown by phantom lines in FIGS. 1 and 3. In addition, dummy ducts 36 and 37 extending in opposite directions to the gas duct peripheral wall penetrating portions 34 and 35 of the primary and secondary air inlet ducts 9a and 9b may be connected, without dividing into primary and secondary air 10a and 10b. Needless to say, various modifications can be made within the range not departing from the gist of the present invention, such as being applicable to a rotary regeneration air preheater of a type that preheats air.
【００２１】[0021]
【発明の効果】以上、説明したように本発明の請求項１
記載の回転再生式空気予熱機によれば、ガス入口ダクト
から熱交換エレメントへ流入する高温のガスの流れを均
一化し得、熱交換エレメントの周方向における温度差を
最小限に抑え得るという優れた効果を奏し得、又、本発
明の請求項２記載の回転再生式空気予熱機によれば、ガ
ス入口ダクトから熱交換エレメントへ流入する高温のガ
スの流れを均一化し得、熱交換エレメントの周方向並び
に半径方向における温度差を最小限に抑え得るという優
れた効果を奏し得る。As described above, the first aspect of the present invention is as described above.
According to the described rotary regeneration air preheater, the flow of high-temperature gas flowing from the gas inlet duct to the heat exchange element can be made uniform, and the temperature difference in the circumferential direction of the heat exchange element can be minimized. According to the rotary regenerative air preheater according to claim 2 of the present invention, the flow of high-temperature gas flowing from the gas inlet duct to the heat exchange element can be made uniform, and the circumference of the heat exchange element can be obtained. The excellent effect that the temperature difference in the direction and the radial direction can be minimized can be achieved.
【図１】本発明の一実施例の側断面図である。FIG. 1 is a side sectional view of an embodiment of the present invention.
【図２】図１のＩＩ−ＩＩ断面図である。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】図１のＩＩＩ−ＩＩＩ断面図である。FIG. 3 is a sectional view taken along line III-III in FIG.
【図４】図３のＩＶ−ＩＶ断面図である。4 is a sectional view taken along the line IV-IV in FIG.
【図５】図１のＶ−Ｖ断面図である。5 is a cross-sectional view taken along line VV of FIG.
【図６】図３のＶＩ−ＶＩ断面図である。6 is a sectional view taken along line VI-VI in FIG.
【図７】従来の回転再生式空気予熱機の一例を表わす側
断面図である。FIG. 7 is a side sectional view showing an example of a conventional rotary regeneration air preheater.
【図８】図７のＶＩＩＩ−ＶＩＩＩ断面図である。8 is a sectional view taken along line VIII-VIII in FIG.
【図９】図７のＩＸ−ＩＸ断面図である。9 is a sectional view taken along line IX-IX in FIG.
【図１０】図９のＸ−Ｘ断面図である。10 is a sectional view taken along line XX of FIG.
【図１１】図７に示す回転再生式空気予熱機の空気フー
ド等の部品を表わす斜視図である。11 is a perspective view showing parts such as an air hood of the rotary regeneration air preheater shown in FIG. 7. FIG.
３ 熱交換エレメント ５ 主軸 ６ａ 一次空気入口側フード（空気フード） ６ｂ 二次空気入口側フード（空気フード） ７ａ 一次空気出口側フード（空気フード） ７ｂ 二次空気出口側フード（空気フード） ９ａ 一次空気入口ダクト（空気ダクト） ９ｂ 二次空気入口ダクト（空気ダクト） １１ａ 一次空気出口ダクト（空気ダクト） １１ｂ 二次空気出口ダクト（空気ダクト） １３ ガス入口ダクト １４ ガス １５ ガス出口ダクト １６ ガス ２９ ガスダクト周壁貫通部 ３０ ダミーダクト ３１ ガスダクト周壁貫通部 ３２ ダミーダクト ３３ ガイドベーン ３４ ガスダクト周壁貫通部 ３５ ガスダクト周壁貫通部 ３６ ダミーダクト ３７ ダミーダクト 3 heat exchange element 5 spindle 6a Primary air inlet side hood (air hood) 6b Secondary air inlet side hood (air hood) 7a Primary air outlet side hood (air hood) 7b Secondary air outlet side hood (air hood) 9a Primary air inlet duct (air duct) 9b Secondary air inlet duct (air duct) 11a Primary air outlet duct (air duct) 11b Secondary air outlet duct (air duct) 13 gas inlet duct 14 gas 15 gas outlet duct 16 gas 29 Gas duct peripheral wall penetration 30 dummy duct 31 Gas duct peripheral wall penetration 32 dummy duct 33 guide vanes 34 Gas duct peripheral wall penetration 35 Gas duct peripheral wall penetration 36 Dummy duct 37 Dummy duct
Claims (2)
メントと、該熱交換エレメントへ高温のガスを供給する
ガス入口ダクトと、前記熱交換エレメントを通過した低
温のガスを排出するガス出口ダクトと、前記熱交換エレ
メントの中心部を貫通して延びる主軸と一緒に回転可能
となるよう、前記ガス入口ダクトとガス出口ダクト内に
熱交換エレメントを挟んで対向配置された空気フード
と、前記ガス入口ダクト内に配置された空気フードに接
続され、前記ガス入口ダクトの中心部からガスダクト周
壁側へ延び該ガスダクト周壁を貫通して外部へ延びる空
気ダクトと、前記ガス出口ダクト内に配置された空気フ
ードに接続され、前記ガス出口ダクトの中心部からガス
ダクト周壁側へ延び該ガスダクト周壁を貫通して外部へ
延びる空気ダクトとを備えた回転再生式空気予熱機にお
いて、前記ガス入口ダクトとガス出口ダクト内に配置さ
れた空気フードに接続される空気ダクトのうち少なくと
もガス入口ダクト内に配設される空気ダクトに、該空気
ダクトと略同一外形形状を有し且つ空気ダクトの前記ガ
スダクト周壁貫通部と反対方向へ延びるダミーダクトを
接続したことを特徴とする回転再生式空気予熱機。1. A heat exchange element having a large number of through holes inside, a gas inlet duct for supplying a high temperature gas to the heat exchange element, and a gas outlet duct for discharging a low temperature gas passing through the heat exchange element. An air hood arranged to face each other in the gas inlet duct and the gas outlet duct so as to be rotatable together with a main shaft extending through the center of the heat exchange element, and the gas. An air duct connected to an air hood arranged in the inlet duct, extending from the center of the gas inlet duct to the gas duct peripheral wall side and penetrating the gas duct peripheral wall to the outside, and air arranged in the gas outlet duct. An air duct connected to the hood, extending from the center of the gas outlet duct to the gas duct peripheral wall side and penetrating the gas duct peripheral wall to the outside. In a rotary regeneration air preheater equipped with the air duct, at least the air duct connected to the air hoods disposed in the gas inlet duct and the gas outlet duct is disposed in the gas inlet duct. A regenerative air preheater having a substantially same outer shape as the above, and a dummy duct extending in a direction opposite to the gas duct peripheral wall penetrating portion of the air duct is connected.
フード外側に、高温のガスを熱交換エレメント中心部へ
導くガイドベーンを取り付けた請求項１記載の回転再生
式空気予熱機。2. The rotary regenerative air preheater according to claim 1, wherein a guide vane for guiding the high temperature gas to the center of the heat exchange element is attached to the outside of the air hood provided in the gas inlet duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14383693A JP3422044B2 (en) | 1993-06-15 | 1993-06-15 | Rotary regenerative air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14383693A JP3422044B2 (en) | 1993-06-15 | 1993-06-15 | Rotary regenerative air preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH074881A JPH074881A (en) | 1995-01-10 |
| JP3422044B2 true JP3422044B2 (en) | 2003-06-30 |
Family
ID=15348081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14383693A Expired - Fee Related JP3422044B2 (en) | 1993-06-15 | 1993-06-15 | Rotary regenerative air preheater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3422044B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8807991B2 (en) * | 2007-07-10 | 2014-08-19 | Babcock & Wilcox Power Generation Group, Inc. | Oxy-fuel combustion oxidant heater internal arrangement |
-
1993
- 1993-06-15 JP JP14383693A patent/JP3422044B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH074881A (en) | 1995-01-10 |
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