JP2007298245A - Economizer and exhaust heat recovery boiler provided therewith - Google Patents

Economizer and exhaust heat recovery boiler provided therewith Download PDF

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JP2007298245A
JP2007298245A JP2006128347A JP2006128347A JP2007298245A JP 2007298245 A JP2007298245 A JP 2007298245A JP 2006128347 A JP2006128347 A JP 2006128347A JP 2006128347 A JP2006128347 A JP 2006128347A JP 2007298245 A JP2007298245 A JP 2007298245A
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water supply
economizer
inlet
supply pipe
header
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JP4977398B2 (en
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Mikio Yoshikawa
三喜男 吉川
Hiroshi Nishimura
洋 西村
Nobuo Shimono
展雄 下野
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Mitsubishi Power Ltd
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Babcock Hitachi KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an economizer capable of almost evenly passing fluid through a heat transfer pipe. <P>SOLUTION: The economizer is characterized in that an exhaust port formed in a tip of an inlet water supply pipe 5 is blocked by a lid member 15, an opening 16 opened toward an arrangement direction of the heat transfer pipes 7 is provided on a circumferential wall of the tip of the inlet water supply pipe 5, and the tip of the inlet water supply pipe 5 including the opening 16 is inserted into an interior of an inlet header 6 to fix the inlet water supply pipe 5 to the inlet header 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は節炭器に係り、特に節炭器内の伝熱管に流体をほぼ均一に流すのに好適な節炭器ならびにそれを備えた排熱回収ボイラに関するものである。   The present invention relates to a economizer, and more particularly to an economizer suitable for flowing a fluid almost uniformly through a heat transfer pipe in the economizer and an exhaust heat recovery boiler equipped with the economizer.

従来の排熱回収ボイラ用節炭器の例を、図５ないし図８に示す。図５は節炭器パネルの正面図、図６ならびに図７は入口管寄せの給水管取付部位の構造を説明するための図、図８はその入口管寄せ付近での内部流体のフローアンバランスを説明するための図である。   Examples of conventional economizers for exhaust heat recovery boilers are shown in FIGS. FIG. 5 is a front view of the economizer panel, FIGS. 6 and 7 are diagrams for explaining the structure of the feed pipe attachment portion of the inlet header, and FIG. 8 is a flow imbalance of the internal fluid in the vicinity of the inlet header. It is a figure for demonstrating.

節炭器パネルは図５に示すように、入口管寄せ６と出口管寄せ８との間に多数本の伝熱管７が並行に設置されている。そして前記入口管寄せ６のほぼ中央位置に入口給水管５が、また前記出口管寄せ８のほぼ中央位置に出口排水管１０が、それぞれ接続されている。この節炭器パネルを多数枚組合せて、前記節炭器２が構成される。   As shown in FIG. 5, in the economizer panel, a large number of heat transfer tubes 7 are installed in parallel between an inlet header 6 and an outlet header 8. An inlet water supply pipe 5 is connected to a substantially central position of the inlet header 6, and an outlet drain pipe 10 is connected to a substantially central position of the outlet header 8. The economizer 2 is configured by combining a plurality of economizer panels.

前記節炭器パネルにおいて、前記入口給水管５は図６に示すように前記入口管寄せ６の伝熱管７取付位置とは反対側に垂直に設置されて、図７に示すように入口給水管５の排出口１１が伝熱管７の流入口１３側と対向している。このため図８に示すように、給水管５の近傍に設置されている伝熱管７、特に給水管５の排出口１１と対向する流入口１３を有する伝熱管７、すなわち直上の伝熱管７には動圧の影響により給水１４が集中的に多く流れ、給水管５から離れると給水１４が流れにくくなり、全体としてフローアンバランスを生じていた。フローアンバランスがあると、流量の少ない伝熱管７ではメタル温度が極端に上昇し、伝熱管７の焼損などを招くとともに、熱回収効率が低下するため、フローアンバランスの発生を抑制する必要がある。   In the economizer panel, the inlet water supply pipe 5 is installed vertically on the side opposite to the heat transfer pipe 7 mounting position of the inlet header 6 as shown in FIG. 6, and the inlet water supply pipe as shown in FIG. The 5 outlets 11 are opposed to the inlet 13 side of the heat transfer tube 7. Therefore, as shown in FIG. 8, the heat transfer pipe 7 installed in the vicinity of the water supply pipe 5, particularly the heat transfer pipe 7 having the inlet 13 facing the discharge port 11 of the water supply pipe 5, that is, the heat transfer pipe 7 immediately above is provided. The water supply 14 flows intensively due to the influence of the dynamic pressure, and when it leaves the water supply pipe 5, it becomes difficult for the water supply 14 to flow, resulting in a flow imbalance as a whole. If there is flow unbalance, the heat transfer tube 7 with a small flow rate will cause the metal temperature to rise extremely, leading to burnout of the heat transfer tube 7 and lowering the heat recovery efficiency, so it is necessary to suppress the occurrence of flow unbalance. is there.

この伝熱管７毎の内部流体（給水１４）のフローアンバランスを低減するために、従来は給水管５の口径を大きくして、流れ込む流体の動圧を小さくしていた。   In order to reduce the flow unbalance of the internal fluid (feed water 14) for each heat transfer pipe 7, conventionally, the diameter of the feed water pipe 5 is increased to reduce the dynamic pressure of the flowing fluid.

なお、節炭器などに関しては例えば下記のような特許文献を挙げることができる。
特開昭５７−１６１４０４号公報 特開平０６−２２９５０３号公報 特開平１０−０５４５０４号公報 Regarding the economizer, for example, the following patent documents can be cited.
JP 57-161404 A Japanese Patent Laid-Open No. 06-229503 Japanese Patent Laid-Open No. 10-054504

前述した従来技術では、内部流体のフローアンバランスを低減するために、給水管５の口径を必要以上に大きくしており、またその口径の大きい給水管５に合わせて必要以上に大きな給水止弁も必要であり、このようなことからコスト高を招来することとなっていた。さらにこの構造でも、内部流体のフローアンバランスを有効に除去することができなかった。   In the prior art described above, in order to reduce the flow unbalance of the internal fluid, the diameter of the water supply pipe 5 is made larger than necessary, and the water supply stop valve that is larger than necessary in accordance with the water supply pipe 5 having a large diameter. This is necessary, and this has led to high costs. Furthermore, even with this structure, the flow imbalance of the internal fluid could not be effectively removed.

本発明の目的は、このような従来技術の欠点を解消し、給水管の口径を必要以上に大きくしなくても、伝熱管に流体をほぼ均一に流すことのできる節炭器ならびにそれを備えた排熱回収ボイラを提供することにある。   An object of the present invention is to eliminate such drawbacks of the prior art, and to provide a economizer capable of flowing a fluid almost uniformly through a heat transfer pipe without increasing the diameter of the water supply pipe more than necessary. It is to provide a waste heat recovery boiler.

前記目的を達成するため本発明の第１の手段は、入口管寄せと、出口管寄せと、前記入口管寄せと出口管寄せとの間に多数本並行に接続された伝熱管と、前記入口管寄せに対して垂直方向に接続された入口給水管と、前記出口管寄せに対して垂直方向に接続された出口排水管とを備えた節炭器において、
前記入口給水管の先端に形成されている排出口を蓋部材で塞ぎ、
前記入口給水管の排出口が形成されている先端部の周壁に、前記入口管寄せ上の前記伝熱管の配列方向に向けて開口する例えば孔あるいはスリットなどの開口部を設け、
その開口部を含む前記入口給水管の先端部を前記入口管寄せの内部に挿入して、前記入口給水管を入口管寄せに固定したことを特徴とするものである。 In order to achieve the object, the first means of the present invention includes an inlet header, an outlet header, a plurality of heat transfer tubes connected in parallel between the inlet header and the outlet header, and the inlet. In a economizer comprising an inlet water supply pipe connected in a vertical direction to a header and an outlet drain pipe connected in a direction perpendicular to the outlet header,
The outlet formed at the tip of the inlet water supply pipe is closed with a lid member,
Provided on the peripheral wall of the distal end portion where the discharge port of the inlet water supply pipe is formed, for example, an opening such as a hole or a slit that opens toward the arrangement direction of the heat transfer pipe on the inlet pipe header,
The tip of the inlet water supply pipe including the opening is inserted into the inlet header, and the inlet water supply pipe is fixed to the inlet header.

本発明の第２の手段は前記第１の手段において、前記入口給水管が前記入口管寄せの下側に接続されて、前記入口給水管の開口部を前記入口管寄せの下側内面に接するように設けたことを特徴とするものである。   According to a second means of the present invention, in the first means, the inlet water supply pipe is connected to the lower side of the inlet header, and the opening of the inlet water supply pipe is in contact with the lower inner surface of the inlet header. It is characterized by providing as described above.

本発明の第３の手段は前記第１の手段において、前記入口給水管の開口部が複数設けられており、その開口部の合計開口面積が当該入口給水管の流通断面積と等しいかあるいはそれ以上であることを特徴とするものである。   According to a third means of the present invention, in the first means, a plurality of openings of the inlet water supply pipe are provided, and a total opening area of the openings is equal to or equal to a flow sectional area of the inlet water supply pipe. It is the above, It is characterized by the above.

本発明の第４の手段は、燃焼排ガスを流通する煙道内に節炭器を設け、前記煙道内を流通する燃焼排ガスの保有熱を前記節炭器内に流す給水で回収する排熱回収ボイラにおいて、前記節炭器が前記第１ないし３の手段の節炭器であることを特徴とするものである。   According to a fourth aspect of the present invention, there is provided a waste heat recovery boiler in which a economizer is provided in a flue that circulates combustion exhaust gas, and the retained heat of the combustion exhaust gas that circulates in the flue is recovered by feed water flowing into the economizer. In the above, the economizer is the economizer of the first to third means.

本発明は前述したように、入口給水管の先端に形成されている排出口を蓋部材で塞ぎ、入口給水管の排出口が形成されている先端部の周壁に、前記入口管寄せ上の前記伝熱管の配列方向に向けて開口する開口部を設けることにより、伝熱管毎の内部流体のフローアンバランスが有効に除去される。   As described above, in the present invention, the discharge port formed at the tip of the inlet water supply pipe is closed with a lid member, and the peripheral wall of the tip portion where the discharge port of the inlet water supply pipe is formed has the above-mentioned on the inlet header. By providing the opening that opens in the arrangement direction of the heat transfer tubes, the flow imbalance of the internal fluid for each heat transfer tube is effectively removed.

以下、本発明の実施形態を図とともに説明する。図１は本発明の実施形態に係る入口管寄せの給水管取付部位の構造を説明するための図、図２はその入口管寄せ付近での内部流体のフロー状態を説明するための図、図３はその節炭器を備えた排熱回収ボイラの概略構成図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining the structure of a water supply pipe mounting portion of an inlet header according to an embodiment of the present invention. FIG. 2 is a diagram for explaining the flow state of internal fluid in the vicinity of the inlet header. 3 is a schematic configuration diagram of an exhaust heat recovery boiler equipped with the economizer.

先ず、図３を用いて排熱回収ボイラの概略構成を説明する。同図に示すように排熱回収ボイラ１は節炭器２、蒸発器３、過熱器４ならびにドラム１２などの機器から主に構成され、前記節炭器２は図５に示す節炭器パネルを多数枚組み合わせて構成されている。   First, a schematic configuration of the exhaust heat recovery boiler will be described with reference to FIG. As shown in the figure, the exhaust heat recovery boiler 1 is mainly composed of equipment such as a economizer 2, an evaporator 3, a superheater 4, and a drum 12, and the economizer 2 is the economizer panel shown in FIG. It is configured by combining a large number of sheets.

排熱回収ボイラ１の煙道内において燃焼排ガスの流れ方向に沿って過熱器４、蒸発器３、ならびに節炭器２の順で配置され、各機器は配管を用いて図に示すように接続されている。ガスタービンから排出された高温燃焼排ガスが保有している熱は、過熱器４、蒸発器３ならびに節炭器２において効率良く順次回収され、所定の後処理によりクリーン化された後、煙突（図示せず）から大気に放出される。   The superheater 4, the evaporator 3 and the economizer 2 are arranged in this order along the flow direction of the combustion exhaust gas in the flue of the exhaust heat recovery boiler 1, and each device is connected as shown in the figure using piping. ing. The heat stored in the high-temperature combustion exhaust gas discharged from the gas turbine is efficiently and sequentially recovered in the superheater 4, the evaporator 3 and the economizer 2, and after being cleaned by a predetermined post-treatment, the chimney (Fig. (Not shown) to the atmosphere.

一方、給水ポンプ（図示せず）により圧送される給水は節炭器２を通すことにより排熱によって加熱されて高温水となり、ドラム１２に導かれる。ドラム１２内の高温水は蒸発器３を通すことにより加熱されて水蒸気となり、ドラム１２で汽水分離され、水蒸気は過熱器４を通すことによりさらに過熱されて、過熱蒸気はタービンへ送られる。   On the other hand, feed water pumped by a feed water pump (not shown) is heated by exhaust heat by passing through the economizer 2 to become high-temperature water, and is led to the drum 12. The high-temperature water in the drum 12 is heated by passing through the evaporator 3 to become steam, separated by steam by the drum 12, the steam is further superheated by passing through the superheater 4, and the superheated steam is sent to the turbine.

本実施形態においても節炭器パネルは図５に示すように、入口管寄せ６と出口管寄せ８との間に多数本の伝熱管７が並行に設置されて、節炭器パネルを構成している。そして前記入口管寄せ６のほぼ中央位置に入口給水管５が、また前記出口管寄せ８のほぼ中央位置に出口排水管１０が、それぞれ接続されている。   Also in this embodiment, as shown in FIG. 5, the economizer panel includes a plurality of heat transfer tubes 7 arranged in parallel between the inlet header 6 and the outlet header 8 to constitute the economizer panel. ing. An inlet water supply pipe 5 is connected to a substantially central position of the inlet header 6, and an outlet drain pipe 10 is connected to a substantially central position of the outlet header 8.

図１に示すように前記入口給水管５は、前記入口管寄せ６の伝熱管７取付位置とは反対側、すなわち入口管寄せ６の下側に入口管寄せ６の軸方向に対して垂直方向に接続されている。入口給水管５の先端に形成されている排出口１１は蓋部材１５で覆われて、その殆どが、あるいは完全に塞がれている。蓋部材１５の外径は、入口給水管５の外径とほぼ等しく設計されている。   As shown in FIG. 1, the inlet water supply pipe 5 is perpendicular to the axial direction of the inlet header 6 on the opposite side of the inlet header 6 from the mounting position of the heat transfer pipe 7, that is, below the inlet header 6. It is connected to the. The discharge port 11 formed at the tip of the inlet water supply pipe 5 is covered with a lid member 15, most of which is completely or completely blocked. The outer diameter of the lid member 15 is designed to be substantially equal to the outer diameter of the inlet water supply pipe 5.

この入口給水管５の先端部付近の周壁には孔１６が複数形成されており、その孔１６が形成されている先端部が入口管寄せ６の内部に挿入された状態で、入口給水管５が入口管寄せ６に溶接固定されている。前記孔１６は、入口管寄せ６上の伝熱管７の配列方向に向けて開口している。   A plurality of holes 16 are formed in the peripheral wall in the vicinity of the tip of the inlet water supply pipe 5, and the inlet water supply pipe 5 is inserted in the state where the tip of the hole 16 is inserted into the inlet header 6. Is fixed to the inlet header 6 by welding. The holes 16 are opened in the direction in which the heat transfer tubes 7 on the inlet header 6 are arranged.

そのため入口給水管５によって導入された給水１４は孔１６から矢印で示すように伝熱管７の配列方向に向けて左右に分散して噴出され、各伝熱管７の流入口１３に導入される。その結果、図７に示すように給水１４が入口給水管５の直上の伝熱管７に直接流入することなく、左右に分かれるから、図２に示すように各伝熱管７に対してほぼ均等の給水ができる。   Therefore, the water supply 14 introduced by the inlet water supply pipe 5 is dispersed and ejected from the hole 16 to the left and right in the direction of arrangement of the heat transfer pipes 7 as indicated by arrows, and is introduced into the inlets 13 of the heat transfer pipes 7. As a result, the water supply 14 does not flow directly into the heat transfer pipe 7 directly above the inlet water supply pipe 5 as shown in FIG. Can supply water.

図４は、本発明の他の実施形態を説明するための図である。本実施形態は、入口給水管５の周壁にその端縁から軸方向に向けて延びた切り込み状のスリット１７が複数本形成されており、各スリット１７の開口は伝熱管７の配列方向に向けて開口している。前記実施形態と同様に、入口給水管５の排出口１１は蓋部材１５で覆われている。   FIG. 4 is a diagram for explaining another embodiment of the present invention. In the present embodiment, a plurality of slit-like slits 17 extending in the axial direction from the edge of the peripheral wall of the inlet water supply pipe 5 are formed, and the openings of the slits 17 are directed in the arrangement direction of the heat transfer pipes 7. Open. Similar to the embodiment, the outlet 11 of the inlet water supply pipe 5 is covered with a lid member 15.

入口給水管５によって導入された給水１４はスリット１７から矢印で示すように伝熱管７の配列方向に向けて左右に分散して噴出され、各伝熱管７の流入口１３に導入される。前記実施形態では入口給水管５の端縁から軸方向に向けて切り込み状のスリット１７を形成したが、切り込み状でない通常のスリット１７でも構わない。   The water supply 14 introduced by the inlet water supply pipe 5 is dispersed and ejected from the slit 17 in the horizontal direction toward the arrangement direction of the heat transfer tubes 7 as indicated by arrows, and is introduced into the inflow ports 13 of the heat transfer tubes 7. In the above embodiment, the slit 17 is formed in the axial direction from the edge of the inlet water supply pipe 5, but a normal slit 17 that is not cut may be used.

図１に示すように、入口給水管５の周壁に孔１６が複数個形成される場合、そのうち最下部の孔１６は入口管寄せ６の下側内面と接する（合致する）ように形成されている。また図４に示すように、入口給水管５の周壁にスリット１７が複数本形成される場合、そのスリット１７の下端は入口管寄せ６の下側内面と接する（合致する）ように形成されている。このようにすれば、節炭器２内部で生成したドレンをこれら孔１６やスリット１７を通して完全に排出することができる。   As shown in FIG. 1, when a plurality of holes 16 are formed in the peripheral wall of the inlet water supply pipe 5, the lowermost hole 16 is formed so as to be in contact with (match) the lower inner surface of the inlet header 6. Yes. As shown in FIG. 4, when a plurality of slits 17 are formed on the peripheral wall of the inlet water supply pipe 5, the lower ends of the slits 17 are formed so as to be in contact with (match) the lower inner surface of the inlet header 6. Yes. In this way, the drain generated inside the economizer 2 can be completely discharged through the holes 16 and the slits 17.

前記入口給水管５に形成された複数の孔１６の合計開口面積、あるいは複数のスリット１７の合計開口面積は、その入口給水管５の流通断面積と同等かそれ以上に設計されている。このようにすれば、孔１６あるいはスリット１７での圧力損失が低減できる。   The total opening area of the plurality of holes 16 formed in the inlet water supply pipe 5 or the total opening area of the plurality of slits 17 is designed to be equal to or larger than the flow cross-sectional area of the inlet water supply pipe 5. In this way, the pressure loss at the hole 16 or the slit 17 can be reduced.

前述のフローアンバランスの発生は排熱回収ボイラの負荷により異なり、フローアンバランスが発生すると給水流量の少ない伝熱管７のメタル温度が急激に上昇する。そのため、前記孔１６の径，個数あるいはスリット１７の幅，長さ，本数などは、伝熱管７のメタル温度が最も高くなるボイラ負荷において、前述のフローアンバランスが解消されるように夫々決定される。   The occurrence of the aforementioned flow unbalance varies depending on the load of the exhaust heat recovery boiler. When the flow unbalance occurs, the metal temperature of the heat transfer pipe 7 with a small feed water flow rate rises rapidly. Therefore, the diameter and number of the holes 16 or the width, length, and number of the slits 17 are determined so that the above-described flow unbalance is eliminated at the boiler load where the metal temperature of the heat transfer tube 7 is highest. The

前記入口給水管５の排出口１１は蓋部材１５で完全に覆う必要はなく、伝熱管７の間でフローアンバランスが生じない程度に、蓋部材１５で排出口１１の一部を開口したり、また蓋部材１５に一部に開口孔を形成することも可能である。   The discharge port 11 of the inlet water supply pipe 5 does not need to be completely covered with the cover member 15, and a part of the discharge port 11 is opened with the cover member 15 to the extent that no flow unbalance occurs between the heat transfer tubes 7. It is also possible to form an opening hole in a part of the lid member 15.

本発明の実施形態に係る排熱回収ボイラにおける入口管寄せの給水管取付部位の構造を説明するための図である。It is a figure for demonstrating the structure of the feed pipe attachment site | part of the inlet header in the waste heat recovery boiler which concerns on embodiment of this invention. その入口管寄せ付近での内部流体のフロー状態を説明するための図である。It is a figure for demonstrating the flow state of the internal fluid in the vicinity of the inlet header. その節炭器を備えた排熱回収ボイラの概略構成図である。It is a schematic block diagram of the waste heat recovery boiler provided with the economizer. 本発明の他の実施形態に係る入口管寄せの給水管取付部位の構造を説明するための図である。It is a figure for demonstrating the structure of the feed pipe attachment site | part of the inlet header which concerns on other embodiment of this invention. 節炭器パネルの正面図である。It is a front view of a economizer panel. 従来の節炭器における入口管寄せの給水管取付部位の構造を説明するための図である。It is a figure for demonstrating the structure of the feed pipe attachment site | part of the inlet header in the conventional economizer. 従来の節炭器における入口管寄せの給水管取付部位の構造を説明するための図である。It is a figure for demonstrating the structure of the feed pipe attachment site | part of the inlet header in the conventional economizer. その入口管寄せ付近での内部流体のフローアンバランスを説明するための図である。It is a figure for demonstrating the flow imbalance of the internal fluid in the inlet_port | entrance header vicinity.

符号の説明Explanation of symbols

１：排熱回収ボイラ、２：節炭器、３：蒸発器、４：過熱器、５：入口給水管、６：入口管寄せ、７：伝熱管、８：出口管寄せ、１０：出口排出管、１１：排出口、１２：ドラム、１３：流入口、１４：給水、１５：蓋部材、１６：孔、１７：スリット。 1: exhaust heat recovery boiler, 2: economizer, 3: evaporator, 4: superheater, 5: inlet water supply pipe, 6: inlet pipe, 7: heat transfer pipe, 8: outlet pipe, 10: outlet discharge Pipe: 11: outlet, 12: drum, 13: inlet, 14: water supply, 15: lid member, 16: hole, 17: slit.

Claims (4)

入口管寄せと、出口管寄せと、前記入口管寄せと出口管寄せとの間に多数本並行に接続された伝熱管と、前記入口管寄せに対して垂直方向に接続された入口給水管と、前記出口管寄せに対して垂直方向に接続された出口排水管とを備えた節炭器において、
前記入口給水管の先端に形成されている排出口を蓋部材で塞ぎ、
前記入口給水管の排出口が形成されている先端部の周壁に、前記入口管寄せ上の前記伝熱管の配列方向に向けて開口する開口部を設け、
その開口部を含む前記入口給水管の先端部を前記入口管寄せの内部に挿入して、前記入口給水管を入口管寄せに固定したことを特徴とする節炭器。 An inlet header, an outlet header, a number of heat transfer tubes connected in parallel between the inlet header and the outlet header, and an inlet water supply pipe connected in a direction perpendicular to the inlet header In the economizer equipped with an outlet drain pipe connected in a direction perpendicular to the outlet header,
The outlet formed at the tip of the inlet water supply pipe is closed with a lid member,
In the peripheral wall of the tip portion where the discharge port of the inlet water supply pipe is formed, an opening is provided that opens toward the arrangement direction of the heat transfer tubes on the inlet header.
The economizer characterized by inserting the front-end | tip part of the said inlet water supply pipe | tube containing the opening part into the inside of the said inlet header, and fixing the said inlet water supply pipe | tube to the inlet header. 請求項１記載の節炭器において、前記入口給水管が前記入口管寄せの下側に接続されて、前記入口給水管の開口部を前記入口管寄せの下側内面に接するように設けたことを特徴とする節炭器。 The economizer according to claim 1, wherein the inlet water supply pipe is connected to a lower side of the inlet header, and an opening of the inlet water supply pipe is provided so as to contact a lower inner surface of the inlet header. A economizer that features 請求項１記載の節炭器において、前記入口給水管の開口部が複数設けられており、その開口部の合計開口面積が当該入口給水管の流通断面積と等しいかあるいはそれ以上であることを特徴とする節炭器。 The economizer according to claim 1, wherein a plurality of openings of the inlet water supply pipe are provided, and a total opening area of the openings is equal to or larger than a flow cross-sectional area of the inlet water supply pipe. Characteristic economizer. 燃焼排ガスを流通する煙道内に節炭器を設け、前記煙道内を流通する燃焼排ガスの保有熱を前記節炭器内に流す給水で回収する排熱回収ボイラにおいて、
前記節炭器が請求項１ないし３のいずれか１項記載の節炭器であることを特徴とする排熱回収ボイラ。 In a waste heat recovery boiler that provides a economizer in a flue that circulates combustion exhaust gas, and recovers the retained heat of the combustion exhaust gas that circulates in the flue by feed water flowing into the economizer,
An exhaust heat recovery boiler, wherein the economizer is the economizer according to any one of claims 1 to 3.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2141411A1 (en) 2008-06-30 2010-01-06 Cockerill Maintenance & Ingenierie S.A. Header distributor for two-phase flow in a single pass evaporator
JP2011002115A (en) * 2009-06-16 2011-01-06 Chugoku Electric Power Co Inc:The Method of repairing pipe of heat exchanger
JP2011002114A (en) * 2009-06-16 2011-01-06 Chugoku Electric Power Co Inc:The Method of repairing pipe of heat exchanger
JP7427150B1 (en) 2023-04-03 2024-02-05 内蒙古和林発電有限責任公司 Fast decomposition type power plant engine/boiler economizer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57101296A (en) * 1980-12-17 1982-06-23 Mitsubishi Heavy Ind Ltd Header
JPS5918101U (en) * 1982-07-22 1984-02-03 株式会社東芝 Exhaust heat recovery heat exchanger
JP2000065304A (en) * 1998-08-21 2000-03-03 Babcock Hitachi Kk Exhaust heat recovery device and its operation method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57101296A (en) * 1980-12-17 1982-06-23 Mitsubishi Heavy Ind Ltd Header
JPS5918101U (en) * 1982-07-22 1984-02-03 株式会社東芝 Exhaust heat recovery heat exchanger
JP2000065304A (en) * 1998-08-21 2000-03-03 Babcock Hitachi Kk Exhaust heat recovery device and its operation method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2141411A1 (en) 2008-06-30 2010-01-06 Cockerill Maintenance & Ingenierie S.A. Header distributor for two-phase flow in a single pass evaporator
JP2011002115A (en) * 2009-06-16 2011-01-06 Chugoku Electric Power Co Inc:The Method of repairing pipe of heat exchanger
JP2011002114A (en) * 2009-06-16 2011-01-06 Chugoku Electric Power Co Inc:The Method of repairing pipe of heat exchanger
JP7427150B1 (en) 2023-04-03 2024-02-05 内蒙古和林発電有限責任公司 Fast decomposition type power plant engine/boiler economizer

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