JP2014137188A - Moisture separator/heater and moisture separating/heating equipment including the same - Google Patents

Moisture separator/heater and moisture separating/heating equipment including the same Download PDF

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JP2014137188A
JP2014137188A JP2013006110A JP2013006110A JP2014137188A JP 2014137188 A JP2014137188 A JP 2014137188A JP 2013006110 A JP2013006110 A JP 2013006110A JP 2013006110 A JP2013006110 A JP 2013006110A JP 2014137188 A JP2014137188 A JP 2014137188A
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steam
chamber
heater
drain
end chamber
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JP5984687B2 (en
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Kazusaku Fujita
一作 藤田
Hiroshi Yano
博士 矢野
Mitsutaka Kawatani
光隆 川谷
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Priority to JP2013006110A priority Critical patent/JP5984687B2/en
Priority to EP14740991.6A priority patent/EP2947385B1/en
Priority to PCT/JP2014/050089 priority patent/WO2014112408A1/en
Priority to CN201480003580.8A priority patent/CN104870893B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/003Methods of steam generation characterised by form of heating method using combustion of hydrogen with oxygen
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22GSUPERHEATING OF STEAM
    • F22G3/00Steam superheaters characterised by constructional features; Details of component parts thereof
    • F22G3/006Steam superheaters with heating tubes

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  • Life Sciences & Earth Sciences (AREA)
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  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Solid Materials (AREA)
  • Separating Particles In Gases By Inertia (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce the amount of drain accumulated in an end chamber formed by partitioning the interior of a vessel of a moisture separator/heater by an end partition plate while suppressing an increase in equipment cost.SOLUTION: A moisture separator/heater includes: an end partition plate 60 for dividing an interior of a vessel 10 in an axial direction H into an end chamber 62 and a steam chamber 20 in which heating target steam flows; and a heater 55A that penetrates the end partition plate 60, a part of which is located in the end chamber, the other part of which is located in the steam chamber, and that heats the heating target steam flowing in the steam chamber by heating steam S1. The heater 55A is provided with a steam drain tube 58o that discharges drain of the heating steam having been subjected to heat exchange with the heating target steam to an outside of the vessel 10 via the end chamber 62. The vessel 10 is provided with a nozzle 63 connected to a high-pressure fluid supply source T supplying a high-pressure fluid S3 at a higher pressure than a pressure of the end chamber 62, penetrating an interior of the end chamber from below the end chamber 62, and ejecting the high-pressure fluid S3 into the end chamber.

Description

本発明は、蒸気中から湿分を分離すると共に加熱することにより、過熱蒸気を生成する湿分分離加熱器、及びこれを備える湿分分離加熱設備に関する。   The present invention relates to a moisture separation heater that generates superheated steam by separating and heating moisture from steam, and a moisture separation heating facility including the same.

発電プラントでは、高圧蒸気タービンで使用された蒸気をさらに低圧蒸気タービンで使用する場合がある。この場合、蒸気中に湿分があると、低圧蒸気タービンのタービン翼が浸食されてしまうだけでなく、タービンの熱効率の低下を生じてしまう。そこで、この場合、高圧蒸気タービンと低圧蒸気タービンとの間に、高圧蒸気タービンから排出された蒸気中から湿分を分離すると共に加熱して過熱蒸気を生成する湿分分離加熱器が設けられている。   In the power plant, the steam used in the high-pressure steam turbine may be further used in the low-pressure steam turbine. In this case, if there is moisture in the steam, not only the turbine blades of the low-pressure steam turbine are eroded but also the thermal efficiency of the turbine is reduced. Therefore, in this case, a moisture separator / heater is provided between the high-pressure steam turbine and the low-pressure steam turbine to separate moisture from the steam discharged from the high-pressure steam turbine and to generate superheated steam by heating. Yes.

このような湿分分離加熱器としては、例えば、以下の特許文献1に記載されているものがある。   As such a moisture separation heater, there exists a thing described in the following patent documents 1, for example.

この湿分分離過熱器は、水平な軸方向に延びて内部に被加熱蒸気が流入する筒状の容器と、容器内を軸方向で分割して、端室と被加熱蒸気が流入する蒸気室とに仕切る仕切板と、蒸気室内に流入した被加熱蒸気を加熱用蒸気で加熱する加熱器と、を備えている。加熱器は、仕切板を貫通し、一部が蒸気室内に位置し、他の一部が端室内に位置している。   This moisture separator superheater has a cylindrical container that extends in the horizontal axial direction and into which heated steam flows, and a steam chamber into which the inside of the container is divided in the axial direction and into which the heated steam flows. And a heater that heats the steam to be heated that has flowed into the steam chamber with heating steam. The heater penetrates the partition plate, a part is located in the steam chamber, and the other part is located in the end chamber.

実開昭63−197903号公報Japanese Utility Model Publication No. 63-197903

上記特許文献1に記載の湿分分離加熱器では、本来、端室内に蒸気は流入しない。しかしながら、仕切板と加熱器との隙間から蒸気室内の蒸気が僅かではあるが、端室内に流入する。端室内に流入した蒸気は、凝縮してドレンとして端室内に溜まる。端室内のドレン量が多くなると、端室内に位置している加熱器とドレンとが接触し、加熱器が冷却されるため、被加熱蒸気の加熱効率が低下する。このため、端室内にドレンが溜まることは好ましくない。   In the moisture separation heater described in Patent Document 1, steam does not naturally flow into the end chamber. However, a slight amount of steam in the steam chamber flows into the end chamber from the gap between the partition plate and the heater. The steam flowing into the end chamber is condensed and accumulated in the end chamber as drain. When the drain amount in the end chamber increases, the heater and the drain located in the end chamber come into contact with each other and the heater is cooled, so that the heating efficiency of the steam to be heated decreases. For this reason, it is not preferable that drain accumulates in the end chamber.

そこで、内圧が端室の圧力以下のドレンタンクを別途設けて、端室内に溜まったドレンをドレンタンク内に排出する方法が考えられる。しかしながら、この方法では、別途、ドレンタンクを設ける必要があり、設備コストがかさんでしまう。   Therefore, a method is conceivable in which a drain tank having an internal pressure equal to or lower than that of the end chamber is separately provided, and the drain accumulated in the end chamber is discharged into the drain tank. However, in this method, it is necessary to provide a drain tank separately, which increases the equipment cost.

本発明は、上記状況を鑑み、設備コストの増加を抑えつつも、湿分分離加熱器の端室内に溜まるドレンの量を少なくすることができる湿分分離加熱器、及びこれを備えている湿分分離加熱設備を提供することを目的とする。   In view of the above situation, the present invention provides a moisture separation heater that can reduce the amount of drain that accumulates in the end chamber of the moisture separation heater while suppressing an increase in equipment cost, and a humidity equipped with the moisture separator heater. An object is to provide a separation heating system.

上記目的を達成するための発明に係る一態様としての湿分分離加熱器は、
水平な軸方向に延び、該軸方向の両端が封止されて、内部に被加熱蒸気が流入する筒状の容器と、前記容器内を前記軸方向で分割して、端室と前記被加熱蒸気が流入する蒸気室とに仕切る端仕切板と、前記端仕切板を貫通し、一部が前記端室内に位置し、他の一部が前記蒸気室内に位置して、該蒸気室内に流入した前記被加熱蒸気を加熱用蒸気で加熱する加熱器と、を備え、前記加熱器には、前記被加熱蒸気と熱交換した前記加熱用蒸気及び/又はそのドレンを前記端室を経て前記容器外に排出する蒸気ドレン管が設けられ、前記容器には、前記端室の圧力よりも高い圧力の高圧流体を供給する高圧流体供給源と接続され、前記端室の下方から該端室内に貫通し、前記高圧流体を該端室内に噴出するノズルが設けられていることを特徴とする。
The moisture separation heater as one aspect according to the invention for achieving the above object is as follows:
A cylindrical container that extends in the horizontal axial direction, sealed at both ends in the axial direction, and into which the steam to be heated flows, and the inside of the container is divided in the axial direction so that the end chamber and the heated object are divided. An end partition plate that divides into a steam chamber into which steam flows, and the end partition plate, part of which is located in the end chamber, the other part is located in the steam chamber, and flows into the steam chamber. A heater that heats the steam to be heated with steam for heating, and the heater has the steam for heating and / or its drain exchanged with the steam to be heated through the end chamber and the container. A steam drain pipe that discharges to the outside is provided, and the container is connected to a high-pressure fluid supply source that supplies a high-pressure fluid having a pressure higher than that of the end chamber, and penetrates the end chamber from below the end chamber. And a nozzle for ejecting the high-pressure fluid into the end chamber is provided.

当該湿分分離加熱器では、端室の底にドレンが溜まっていても、端室の下方から端室内に噴出する高圧流体により、このドレンが吹き飛ばされ、その一部が加熱器の蒸気ドレン管に接する。加熱器の蒸気ドレン管内には、蒸気室に流入する被加熱蒸気を加熱するための蒸気又はそのドレンが流れるため、この蒸気ドレン管は、端室の底に溜まったドレンよりもはるかに温度が高い。このため、蒸気ドレン管に接したドレンは、気化して蒸気となる。この蒸気の一部は、例えば、容器と端仕切板との隙間から蒸気室内に流入する。   In the moisture separation heater, even if drain is accumulated at the bottom of the end chamber, the drain is blown off by the high-pressure fluid ejected from the lower side of the end chamber into the end chamber, and a part thereof is a steam drain pipe of the heater. To touch. Since steam or its drain for heating the steam to be heated flowing into the steam chamber flows in the steam drain pipe of the heater, this steam drain pipe has a temperature much higher than that of the drain accumulated at the bottom of the end chamber. high. For this reason, the drain in contact with the steam drain pipe is vaporized to become steam. A part of this steam flows into the steam chamber from the gap between the container and the end partition plate, for example.

したがって、当該湿分分離加熱器では、端室の底にドレンが溜まっていても、これを気化させて端室外に流出させることができる。また、湿分分離加熱器を備えている蒸気プラントでは、湿分分離加熱器の端室内の圧力よりも高い蒸気等の高圧流体を保有する機器等が多数存在する。このため、当該湿分分離加熱器では、蒸気プラント内の機器等を高圧流体供給源として容易に利用でき、端室内のドレンを回収するために、内圧が端室の圧力以下のドレンタンクを別途設けるよりも、設備コストの増加を抑えることができる。   Therefore, in the moisture separation heater, even if drain is accumulated at the bottom of the end chamber, it can be vaporized and flowed out of the end chamber. Moreover, in a steam plant equipped with a moisture separation heater, there are a large number of devices and the like that hold a high-pressure fluid such as steam that is higher than the pressure in the end chamber of the moisture separation heater. For this reason, in the moisture separation heater, equipment in the steam plant or the like can be easily used as a high-pressure fluid supply source, and in order to collect the drain in the end chamber, a drain tank whose internal pressure is equal to or lower than the end chamber pressure is separately provided. The increase in equipment cost can be suppressed rather than providing.

ここで、前記湿分分離加熱器において、前記ノズルから前記端室内に噴出された前記高圧流体が前記蒸気ドレン管に向かうよう、該高圧流体をガイドするガイド部材を備えていてもよい。   Here, the moisture separation heater may include a guide member that guides the high-pressure fluid so that the high-pressure fluid ejected from the nozzle into the end chamber is directed to the vapor drain pipe.

加熱器において、伝熱管を通った加熱用蒸気及び/又はそのドレンは、蒸気回収室に一時的に滞留した後、蒸気ドレン管から外部に排出される。このため、加熱器の蒸気ドレン管内では、加熱用蒸気のドレン等が蒸気回収室内でのドレン等の流速よりも高い流速で流れている。したがって、加熱器において、蒸気回収室を内部に形成しているボンネット等の外壁における内外の流体の熱交換率よりも、蒸気ドレン管における内外の流体の熱交換率の方が高い。   In the heater, the heating steam and / or its drain that has passed through the heat transfer tube temporarily stays in the steam recovery chamber, and is then discharged to the outside from the steam drain tube. For this reason, in the steam drain pipe of the heater, the drain of the heating steam flows at a higher flow rate than the flow rate of the drain or the like in the steam recovery chamber. Therefore, in the heater, the heat exchange rate of the fluid inside and outside the steam drain pipe is higher than the heat exchange rate of the fluid inside and outside the outer wall of the bonnet or the like that forms the steam recovery chamber.

そこで、当該湿分分離加熱器では、ガイド部材により、ノズルから端室内に噴出した高圧気体を積極的に加熱器の蒸気ドレン管に導くことで、端室の底に溜まったドレンと蒸気ドレン管との接触率(接触する確率)を高めている。この結果、当該湿分分離加熱器では、端室の底に溜まったドレンを効率的に気化させることができる。   Therefore, in the moisture separation heater, the guide member causes the high-pressure gas ejected from the nozzle to the end chamber to be actively guided to the steam drain pipe of the heater, so that the drain and the steam drain pipe accumulated at the bottom of the end chamber Contact rate (probability of contact) is increased. As a result, in the moisture separation heater, the drain accumulated in the bottom of the end chamber can be efficiently vaporized.

また、以上のいずれかの前記湿分分離加熱器において、前記蒸気ドレン管は、前記端室内で蛇行していてもよい。   In any of the above moisture separators, the steam drain pipe may meander in the end chamber.

当該湿分分離加熱器では、蒸気ドレン管が端室内で蛇行し、端室内での管長が長いため、吹き飛ばされたドレンは、この蒸気ドレン管との接触率が高くなる。   In the moisture separation heater, the steam drain pipe meanders in the end chamber, and the length of the pipe in the end chamber is long. Therefore, the blown-off drain has a high contact rate with the steam drain pipe.

上記目的を達成するための発明に係る一態様としての湿分分離加熱設備は、
以上のいずれかの前記湿分分離加熱器と、前記湿分分離加熱器の前記蒸気室内の下部に溜まったドレンを受け入れる、前記高圧流体供給源としてのドレンタンクと、前記ドレンタンクの上部と前記ノズルとを接続し、該ドレンタンク内の蒸気を前記高圧流体として前記ノズルに供給する高圧流体ラインと、を備えていることを特徴とする。
The moisture separation heating facility as one aspect according to the invention for achieving the above-described object,
Any one of the moisture separation heater described above, a drain tank as the high-pressure fluid supply source that receives drain accumulated in the lower part of the steam chamber of the moisture separation heater, an upper portion of the drain tank, and the A high-pressure fluid line connected to the nozzle and supplying the steam in the drain tank to the nozzle as the high-pressure fluid.

湿分分離加熱器を設置した場合に、この設置と合わせて、湿分分離加熱器からのドレンを受け入れるドレンタンクも設置される。当該湿分分離加熱設備では、このドレンタンクを高圧流体供給源として利用しているので、設備コストの増加を抑えることができる。   When a moisture separator / heater is installed, a drain tank that receives drain from the moisture separator / heater is also installed together with this installation. In the moisture separation and heating facility, since this drain tank is used as a high-pressure fluid supply source, an increase in facility cost can be suppressed.

ここで、前記湿分分離加熱設備において、前記高圧流体ラインには、前記ドレンタンク内から前記ノズルを介して前記端室内に供給される前記蒸気の流量を調節する流量調節弁が設けられていてもよい。   Here, in the moisture separation and heating facility, the high-pressure fluid line is provided with a flow rate adjusting valve for adjusting the flow rate of the steam supplied from the drain tank through the nozzle to the end chamber. Also good.

当該湿分分離加熱設備では、ドレンタンク内からノズルを介して端室内に供給される蒸気の流量を調節することができる。   In the moisture separation and heating facility, the flow rate of steam supplied from the drain tank into the end chamber through the nozzle can be adjusted.

本発明では、設備コストの増加を抑えつつも、湿分分離加熱器の端室内に溜まるドレンの量を少なくすることができる。   In the present invention, it is possible to reduce the amount of drain accumulated in the end chamber of the moisture separation heater while suppressing an increase in equipment cost.

本発明に係る一実施形態における湿分分離加熱器の要部切欠き斜視図である。It is a principal part notch perspective view of the moisture separation heater in one Embodiment which concerns on this invention. 本発明に係る一実施形態における湿分分離加熱器の縦断面図である。It is a longitudinal section of a moisture separation heater in one embodiment concerning the present invention. 図2におけるIII−III線断面図である。It is the III-III sectional view taken on the line in FIG. 図3におけるIV−IV線断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. 図2におけるV−V線断面図である。It is the VV sectional view taken on the line in FIG. 本発明に係る一実施形態における湿分分離加熱器の要部を切り欠いた拡大斜視図である。It is the expansion perspective view which notched the principal part of the moisture separation heater in one Embodiment which concerns on this invention. 本発明に係る一実施形態における湿分分離加熱器及びドレンタンクの要部縦断面図である。It is a principal part longitudinal cross-sectional view of the moisture separation heater and drain tank in one Embodiment which concerns on this invention. 本発明に係る一実施形態における蒸気プラントの系統図である。It is a distribution diagram of a steam plant in one embodiment concerning the present invention. 本発明に係る一実施形態の変形例における湿分分離加熱器及びドレンタンクの要部縦断面図である。It is a principal part longitudinal cross-sectional view of the moisture separation heater and drain tank in the modification of one Embodiment which concerns on this invention.

以下、本発明に係る湿分分離加熱設備の一実施形態及びその変形例について、図面を参照して詳細に説明する。   Hereinafter, an embodiment of a moisture separation and heating facility according to the present invention and a modification thereof will be described in detail with reference to the drawings.

「湿分分離加熱設備の実施形態」
まず、本発明に係る湿分分離加熱設備の一実施形態について、図1〜図8を用いて説明する。
"Embodiment of moisture separation heating equipment"
First, an embodiment of a moisture separation and heating facility according to the present invention will be described with reference to FIGS.

本実施形態の湿分分離加熱設備は、図8に示すように、蒸気プラントの一部を構成している。この蒸気プラントは、BWR(Boiling Water Reactor)型原子炉圧力容器1と、これを覆う原子炉格納容器2と、原子炉圧力容器1で発生した蒸気で駆動する高圧蒸気タービン3と、高圧蒸気タービン3から排気された蒸気から湿分を分離すると共にこの蒸気を加熱する湿分分離加熱設備4と、湿分分離加熱設備4からの蒸気で駆動する低圧蒸気タービン5と、高圧蒸気タービン3及び低圧蒸気タービン5の駆動で発電する発電機6と、低圧蒸気タービン5から排気された蒸気を水に戻す復水器7と、復水器7内の水を原子炉圧力容器1内に送る給水ポンプ8と、を備えている。   As shown in FIG. 8, the moisture separation and heating facility of the present embodiment constitutes a part of a steam plant. This steam plant includes a BWR (Boiling Water Reactor) type reactor pressure vessel 1, a reactor containment vessel 2 covering the reactor, a high pressure steam turbine 3 driven by steam generated in the reactor pressure vessel 1, and a high pressure steam turbine. 3, a moisture separation heating equipment 4 that separates moisture from the steam exhausted from the steam 3 and heats the steam, a low pressure steam turbine 5 that is driven by steam from the moisture separation heating equipment 4, a high pressure steam turbine 3, and a low pressure A generator 6 that generates electric power by driving the steam turbine 5, a condenser 7 that returns the steam exhausted from the low-pressure steam turbine 5 to water, and a feed water pump that sends the water in the condenser 7 into the reactor pressure vessel 1. 8 and.

湿分分離加熱設備4は、高圧蒸気タービン3から排気された蒸気から湿分を分離すると共にこの蒸気を加熱する湿分分離加熱器Mと、この湿分分離加熱器M内に溜まったドレンを受け入れるドレンタンクTと、を備えている。   The moisture separation and heating equipment 4 separates moisture from the steam exhausted from the high-pressure steam turbine 3 and heats the steam, and the drain collected in the moisture separation heater M. And a drain tank T for receiving.

湿分分離加熱器Mは、図1〜図5に示すように、被加熱蒸気Sが内部に入り込む筒状の容器10と、容器10内に入り込んだ被加熱蒸気Sを加熱する加熱器55A,55Bと、を備えている。なお、図3は図2におけるIII−III線断面図であり、図4は図3におけるIV−IV線断面図であり、図5は図2におけるV−V線断面図である。   As shown in FIGS. 1 to 5, the moisture separation heater M includes a cylindrical container 10 into which the heated steam S enters, and a heater 55 </ b> A that heats the heated steam S that has entered the container 10. 55B. 3 is a sectional view taken along line III-III in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a sectional view taken along line VV in FIG.

容器10は、水平な軸方向Hに延びる円筒状の胴体15と、胴体15における軸方向Hの端を塞ぐ鏡16と、を有している。この容器10の内部は、端仕切板60により、端室62と蒸気室20とに軸方向Hに分割されている。なお、以下では、水平な方向であって軸方向Hと垂直な方向を横幅方向Wとする。   The container 10 includes a cylindrical body 15 that extends in the horizontal axial direction H, and a mirror 16 that closes the end of the body 15 in the axial direction H. The inside of the container 10 is divided into an end chamber 62 and a steam chamber 20 in the axial direction H by an end partition plate 60. Hereinafter, a horizontal direction and a direction perpendicular to the axial direction H will be referred to as a lateral width direction W.

容器10には、蒸気室20内に被加熱蒸気Sを受け入れる蒸気入口11と、蒸気室20内で湿分分離及び加熱された過熱蒸気HSを送出する複数の蒸気出口12と、蒸気ドレンDを蒸気室20内から排出する複数の蒸気ドレン排出口13と、が形成されている。蒸気入口11は、容器10の下部であって、軸方向Hの中央部に形成されている。また、複数の蒸気ドレン排出口13は、容器10の下部であって、蒸気入口11を基準として軸方向Hの両側に形成されている。複数の蒸気出口12は、容器10の上部に、軸方向Hに並んで形成されている。なお、複数の蒸気出口12のうち、1つの蒸気出口12は、蒸気入口11と同様、軸方向Hの中央部に形成されている。   The container 10 includes a steam inlet 11 that receives the heated steam S in the steam chamber 20, a plurality of steam outlets 12 that send out superheated steam HS that has been separated and heated in the steam chamber 20, and a steam drain D. A plurality of steam drain outlets 13 for discharging from the inside of the steam chamber 20 are formed. The steam inlet 11 is formed in the lower part of the container 10 and in the central part in the axial direction H. The plurality of steam drain discharge ports 13 are formed on both sides of the axial direction H with respect to the steam inlet 11 at the lower part of the container 10. The plurality of vapor outlets 12 are formed in the upper part of the container 10 along the axial direction H. Of the plurality of steam outlets 12, one steam outlet 12 is formed at the central portion in the axial direction H, similarly to the steam inlet 11.

蒸気室20内には、蒸気入口11から流入した被加熱蒸気Sが入り込む蒸気受入室21と、蒸気受入室21と連通し且つ軸方向Hにおける蒸気受入室21の両側に隣接している供給マニホールド室22(図4及び図5参照)と、供給マニホールド室22と連通し且つ供給マニホールド室22の下側に隣接している湿分分離室23(図4及び図5参照)と、湿分分離室23と連通し加熱器55A,55Bが収納されている加熱室24と、湿分分離室23に連通し且つこの湿分分離室23及び加熱室24の下側に隣接している蒸気ドレン回収室25(図4及び図5参照)と、加熱室24及び蒸気出口12と連通し且つ蒸気受入室21、供給マニホールド室22及び加熱室24の上側に隣接している蒸気回収マニホールド室26と、が形成されている。   In the steam chamber 20, a steam receiving chamber 21 into which the heated steam S flowing from the steam inlet 11 enters, and a supply manifold that communicates with the steam receiving chamber 21 and is adjacent to both sides of the steam receiving chamber 21 in the axial direction H. A moisture separation chamber 23 (see FIGS. 4 and 5), a moisture separation chamber 23 (see FIGS. 4 and 5) that communicates with the supply manifold chamber 22 and is adjacent to the lower side of the supply manifold chamber 22; Steam drain recovery in communication with the chamber 23 and in the heating chamber 24 in which the heaters 55 </ b> A and 55 </ b> B are accommodated, and in the moisture separation chamber 23 and adjacent to the moisture separation chamber 23 and the heating chamber 24. A steam recovery manifold chamber 26 communicating with the heating chamber 24 and the steam outlet 12 and adjacent to the upper side of the steam receiving chamber 21, the supply manifold chamber 22 and the heating chamber 24; Is formed .

蒸気回収マニホールド室26は、図1及び図2に示すように、蒸気室20の軸方向Hのほぼ全体にわたって、蒸気室20内の上部に形成されている。一方、蒸気受入室21は、蒸気室20の軸方向Hの中央部に、蒸気回収マニホールド室26の下側に隣接して形成されている。この蒸気回収マニホールド室26と蒸気受入室21とは、図3及び図6に示すように、天井板30により仕切られている。   As shown in FIGS. 1 and 2, the steam recovery manifold chamber 26 is formed in the upper part of the steam chamber 20 over substantially the entire axial direction H of the steam chamber 20. On the other hand, the steam receiving chamber 21 is formed in the central portion of the steam chamber 20 in the axial direction H and adjacent to the lower side of the steam recovery manifold chamber 26. The steam collection manifold chamber 26 and the steam receiving chamber 21 are partitioned by a ceiling plate 30 as shown in FIGS.

供給マニホールド室22、湿分分離室23、加熱室24及び蒸気ドレン回収室25は、いずれも、図1、図2及び図4に示すように、軸方向Hにおける蒸気受入室21の両側に隣接している。図2及び図5に示すように、軸方向Hで蒸気受入室21からズレた位置には、横幅方向Wの中央に加熱室24が形成されている。さらに、横幅方向Wにおける加熱室24の両側に供給マニホールド室22が形成され、横幅方向Wにおける加熱室24の両側であって供給マニホールド室22の下側に湿分分離室23が形成されている。蒸気受入室21、加熱室24及び供給マニホールド室22の上側には、蒸気回収マニホールド室26が形成されている。また、軸方向Hで蒸気受入室21からズレた位置であって、加熱室24及び湿分分離室23の下側には蒸気ドレン回収室25が形成されている。   The supply manifold chamber 22, the moisture separation chamber 23, the heating chamber 24 and the steam drain recovery chamber 25 are all adjacent to both sides of the steam receiving chamber 21 in the axial direction H as shown in FIGS. 1, 2 and 4. doing. As shown in FIGS. 2 and 5, a heating chamber 24 is formed at the center in the lateral width direction W at a position shifted from the steam receiving chamber 21 in the axial direction H. Further, supply manifold chambers 22 are formed on both sides of the heating chamber 24 in the lateral width direction W, and moisture separation chambers 23 are formed on both sides of the heating chamber 24 in the lateral width direction W and below the supply manifold chamber 22. . A steam recovery manifold chamber 26 is formed above the steam receiving chamber 21, the heating chamber 24, and the supply manifold chamber 22. A steam drain recovery chamber 25 is formed at a position shifted from the steam receiving chamber 21 in the axial direction H and below the heating chamber 24 and the moisture separation chamber 23.

軸方向Hで蒸気受入室21と隣接している供給マニホールド室22、湿分分離室23、加熱室24及び蒸気ドレン回収室25のうち、湿分分離室23、加熱室24及び蒸気ドレン回収室25は、図1〜図3及び図6に示すように、蒸気受入室21との間が横仕切板33により仕切られている。なお、供給マニホールド室22は、蒸気受入室21と連通させるため、蒸気受入室21との間は横仕切板33で仕切られておらず、開口している。   Of the supply manifold chamber 22, the moisture separation chamber 23, the heating chamber 24 and the steam drain recovery chamber 25 adjacent to the steam receiving chamber 21 in the axial direction H, the moisture separation chamber 23, the heating chamber 24 and the steam drain recovery chamber As shown in FIGS. 1 to 3 and 6, 25 is partitioned from the steam receiving chamber 21 by a horizontal partition plate 33. The supply manifold chamber 22 communicates with the steam receiving chamber 21, and is not partitioned by the horizontal partition plate 33 from the steam receiving chamber 21 but is open.

供給マニホールド室22は、図5及び図6に示すように、この供給マニホールド室22の上側に隣接している蒸気回収マニホールド室26との間が傾斜板35により仕切られている。この傾斜板35は、横幅方向Wにおいて、その中央部から遠ざかるに連れて次第に上側に向って傾斜し、中央部から最も遠い端部が容器10の内面に接合されている。   As shown in FIGS. 5 and 6, the supply manifold chamber 22 is partitioned from the steam recovery manifold chamber 26 adjacent to the upper side of the supply manifold chamber 22 by an inclined plate 35. In the lateral width direction W, the inclined plate 35 is gradually inclined upward as it moves away from the central portion, and the end portion farthest from the central portion is joined to the inner surface of the container 10.

湿分分離室23は、図4及び図5に示すように、この湿分分離室23の上側に隣接している供給マニホールド室22との間が分配板36により仕切られている。この分配板36には、上下方向Vに貫通し、横幅方向Wに長いスリット37が複数形成されている。蒸気ドレン回収室25は、この蒸気ドレン回収室25の上側に隣接している加熱室24及び湿分分離室23との間が底板38により仕切られている。加熱室24は、横幅方向Wにおける加熱室24の両側に隣接している供給マニホールド室22及び湿分分離室23と縦仕切板43により仕切られている。この縦仕切板43の上端43uには、図6に示すように、蒸気回収マニホールド室26と蒸気受入室21との間を仕切る天井板30の軸方向Hの端縁が接合されている。さらに、この縦仕切板43の上端43uには、図5及び図6に示すように、供給マニホールド室22と蒸気回収マニホールド室26との間を仕切る傾斜板35の中央側端部が接合されている。また、この縦仕切板43の上下方向Vの中央部には、湿分分離室23と供給マニホールド室22との間を仕切る分配板36の中央側端部が接合されている。   As shown in FIGS. 4 and 5, the moisture separation chamber 23 is partitioned from the supply manifold chamber 22 adjacent to the upper side of the moisture separation chamber 23 by a distribution plate 36. In the distribution plate 36, a plurality of slits 37 penetrating in the vertical direction V and long in the horizontal width direction W are formed. The steam drain recovery chamber 25 is partitioned by a bottom plate 38 from the heating chamber 24 and the moisture separation chamber 23 adjacent to the upper side of the steam drain recovery chamber 25. The heating chamber 24 is partitioned by a supply manifold chamber 22, a moisture separation chamber 23 and a vertical partition plate 43 that are adjacent to both sides of the heating chamber 24 in the lateral width direction W. As shown in FIG. 6, the edge in the axial direction H of the ceiling plate 30 that partitions between the steam recovery manifold chamber 26 and the steam receiving chamber 21 is joined to the upper end 43 u of the vertical partition plate 43. Furthermore, as shown in FIGS. 5 and 6, the upper end 43 u of the vertical partition plate 43 is joined to the center side end portion of the inclined plate 35 that partitions the supply manifold chamber 22 and the steam recovery manifold chamber 26. Yes. Further, the central end of the vertical partition plate 43 in the vertical direction V is joined to the central end of the distribution plate 36 that partitions the moisture separation chamber 23 and the supply manifold chamber 22.

図5に示す蒸気回収マニホールド室26、供給マニホールド室22、湿分分離室23、加熱室24、蒸気ドレン回収室25で、軸方向Hにおける蒸気受入室21と反対側の端部は、図1及び図2に示すように、いずれも、端仕切板60で塞がれている。このため、供給マニホールド室22と蒸気回収マニホールド室26とを仕切る傾斜板35、湿分分離室23と供給マニホールド室22との間に配置されている分配板36、供給マニホールド室22及び湿分分離室23と加熱室24とを仕切る縦仕切板43、加熱室24及び湿分分離室23と蒸気ドレン回収室25との間に配されている底板38の軸方向Hの端は、いずれも、端仕切板60に接合されている。なお、端仕切板60の上端には、図7に示すように、蒸気回収マニホールド室26と端室62とを連通させて、蒸気室20内の空気を抜くための空気抜き孔61が形成されている。   In the steam recovery manifold chamber 26, the supply manifold chamber 22, the moisture separation chamber 23, the heating chamber 24, and the steam drain recovery chamber 25 shown in FIG. As shown in FIG. 2 and FIG. Therefore, the inclined plate 35 that partitions the supply manifold chamber 22 and the steam recovery manifold chamber 26, the distribution plate 36 disposed between the moisture separation chamber 23 and the supply manifold chamber 22, the supply manifold chamber 22 and the moisture separation. The longitudinal partition plate 43 that partitions the chamber 23 and the heating chamber 24, the end in the axial direction H of the bottom plate 38 disposed between the heating chamber 24 and the moisture separation chamber 23, and the steam drain recovery chamber 25, It is joined to the end partition plate 60. As shown in FIG. 7, an air vent hole 61 is formed at the upper end of the end partition plate 60 to allow the steam recovery manifold chamber 26 and the end chamber 62 to communicate with each other to vent the air in the steam chamber 20. Yes.

蒸気受入室21内には、図1〜図3、図6に示すように、軸方向Hに垂直な断面形状がU字型を成し、U字の湾曲箇所に相当する部分が下側を向いているバッフルプレート50が配置されている。   In the steam receiving chamber 21, as shown in FIGS. 1 to 3 and 6, a cross-sectional shape perpendicular to the axial direction H forms a U shape, and a portion corresponding to a curved portion of the U shape has a lower side. A facing baffle plate 50 is arranged.

湿分分離室23内には、図4及び図5に示すように、ミストセパレータ53が配置されている。このミストセパレータ53は、複数の波板(不図示)を軸方向Hに等間隔に配置したもので、波板の各頂部に被加熱蒸気Sの流れに対向するよう邪魔板(不図示)が設けられている。複数の波板の頂部及び底部は、いずれも、上下方向Vに延びている。湿分分離室23と蒸気ドレン回収室25との間を仕切る底板38には、ミストセパレータ53を構成する複数の波板の下部に相当する位置で上下方向Vに貫通した開口39が形成されている。   As shown in FIGS. 4 and 5, a mist separator 53 is disposed in the moisture separation chamber 23. The mist separator 53 has a plurality of corrugated plates (not shown) arranged at equal intervals in the axial direction H, and a baffle plate (not shown) is provided at each apex of the corrugated plates so as to face the flow of the heated steam S. Is provided. Both the top and bottom of the plurality of corrugated plates extend in the vertical direction V. The bottom plate 38 that partitions the moisture separation chamber 23 and the steam drain recovery chamber 25 is formed with an opening 39 penetrating in the vertical direction V at a position corresponding to the lower portion of the plurality of corrugated plates constituting the mist separator 53. Yes.

加熱器55A,55Bは、図1及び図2に示すように、容器10内の下方に配置されている第一加熱器55Aと、容器10内の上方に配置されている第二加熱器55Bとがある。   As shown in FIGS. 1 and 2, the heaters 55 </ b> A and 55 </ b> B include a first heater 55 </ b> A disposed below the container 10, and a second heater 55 </ b> B disposed above the container 10. There is.

各加熱器55A,55Bは、いずれも、U字管で形成されている伝熱管56と、伝熱管56の端部が固定されている管板57と、管板57における伝熱管56が延びている側と反対側を覆うボンネット58と、管板57とボンネット58の内面とで形成される空間を上下に仕切る仕切板59と、を有している。U字管である伝熱管56は、湾曲側の端部56aが容器10の軸方向Hの中央部側に向けられ、伝熱管56の管端56bが容器10の軸方向Hの端部側に向けられている。管板57とボンネット58の内面とで形成される空間で、仕切板59より上側の空間が蒸気受入室59aを形成し、仕切板59より下側の空間が蒸気回収室59bを形成している。ボンネット58には、蒸気受入室59aに加熱用蒸気を供給する蒸気供給管58iが接続されていると共に、蒸気回収室59b内の加熱用蒸気及び/又はそのドレンを外部に排出する蒸気ドレン管58oが接続されている。   Each of the heaters 55A and 55B includes a heat transfer tube 56 formed of a U-shaped tube, a tube plate 57 to which an end of the heat transfer tube 56 is fixed, and a heat transfer tube 56 in the tube plate 57 extending. A bonnet 58 that covers the opposite side of the hood, and a partition plate 59 that divides the space formed by the tube plate 57 and the inner surface of the bonnet 58 up and down. The heat transfer tube 56, which is a U-shaped tube, has an end 56 a on the curved side directed toward the center in the axial direction H of the container 10, and a tube end 56 b of the heat transfer tube 56 on the end in the axial direction H of the container 10. Is directed. In the space formed by the tube plate 57 and the inner surface of the bonnet 58, the space above the partition plate 59 forms a steam receiving chamber 59a, and the space below the partition plate 59 forms a steam recovery chamber 59b. . A steam supply pipe 58i for supplying heating steam to the steam receiving chamber 59a is connected to the bonnet 58, and a steam drain pipe 58o for discharging the heating steam and / or its drain in the steam recovery chamber 59b to the outside. Is connected.

第一加熱器55Aの伝熱管56には、蒸気供給管58i及び蒸気受入室59aを介して、第一加熱用蒸気S1が外部から供給される。また、第二加熱器55Bの伝熱管56には、蒸気供給管58i及び蒸気受入室59aを介して、第二加熱用蒸気S2が供給される。なお、第一加熱用蒸気S1は、高圧蒸気タービン3(図8参照)から湿分分離加熱器Mの蒸気受入室21に流入する被加熱蒸気Sの温度よりも高い温度の蒸気である。また、第二加熱用蒸気S2は、第一加熱用蒸気S1の温度よりも高い温度の蒸気である。   The first heating steam S1 is supplied to the heat transfer pipe 56 of the first heater 55A from the outside through the steam supply pipe 58i and the steam receiving chamber 59a. The second heating steam S2 is supplied to the heat transfer pipe 56 of the second heater 55B through the steam supply pipe 58i and the steam receiving chamber 59a. The first heating steam S1 is steam having a temperature higher than the temperature of the heated steam S flowing from the high-pressure steam turbine 3 (see FIG. 8) into the steam receiving chamber 21 of the moisture separation heater M. The second heating steam S2 is steam having a temperature higher than that of the first heating steam S1.

第一加熱器55Aのボンネット58は、端室62内に配置され、その伝熱管56は、端仕切板60を貫通して加熱室24内に位置している。また、第二加熱器55Bのボンネット58は、容器10外に配置され、その伝熱管56は、容器10の鏡16及び端仕切板60を貫通して、端室62内及び加熱室24内に位置している。図6に示すように、各加熱器55A,55Bにおける伝熱管56の湾曲側の端部56aは、横仕切板33を軸方向Hに貫通し、この横仕切板33及び天井板30の軸方向Hの端部よりも、容器10の軸方向Hにおける中央部側に位置し、囲い板44で覆われている。   The bonnet 58 of the first heater 55 </ b> A is disposed in the end chamber 62, and the heat transfer tube 56 passes through the end partition plate 60 and is positioned in the heating chamber 24. The bonnet 58 of the second heater 55 </ b> B is disposed outside the container 10, and the heat transfer tube 56 passes through the mirror 16 and the end partition plate 60 of the container 10 to enter the end chamber 62 and the heating chamber 24. positioned. As shown in FIG. 6, the end 56a on the curved side of the heat transfer tube 56 in each heater 55A, 55B penetrates the horizontal partition plate 33 in the axial direction H, and the axial direction of the horizontal partition plate 33 and the ceiling plate 30 It is located on the center side in the axial direction H of the container 10 with respect to the end of H, and is covered with a surrounding plate 44.

容器10の鏡16には、図1及び図7に示すように、鏡16の下方から端室62内に貫通し、吹付用蒸気S3を端室62内に噴出するノズル63が設けられている。   As shown in FIGS. 1 and 7, the mirror 16 of the container 10 is provided with a nozzle 63 that penetrates into the end chamber 62 from below the mirror 16 and ejects the spraying steam S <b> 3 into the end chamber 62. .

ドレンタンクTの上部には、図7に示すように、湿分分離加熱器Mの蒸気ドレン回収室25内に溜まった蒸気ドレンDを受け入れるドレン受入口71と、内部の蒸気を排出する蒸気排出口72とが形成されている。また、このドレンタンクTの下部には、内部の蒸気ドレンDを排出するドレン排出口73が形成されている。   As shown in FIG. 7, the drain tank T has a drain receiving port 71 for receiving the steam drain D accumulated in the steam drain recovery chamber 25 of the moisture separation heater M, and a steam exhaust for discharging the steam inside. An outlet 72 is formed. Further, a drain discharge port 73 for discharging the internal steam drain D is formed in the lower portion of the drain tank T.

ドレンタンクTの蒸気排出口72と湿分分離加熱器Mのノズル63とは、ドレンタンクT内の上部に滞留する蒸気を吹付用蒸気S3として端室62内に供給するため、吹付用蒸気ライン(高圧流体ライン)75で接続されている。この吹付用蒸気ライン75には、ここを通る吹付用蒸気S3の流量を調節する流量調節弁76が設けられている。   The steam discharge port 72 of the drain tank T and the nozzle 63 of the moisture separation heater M supply the steam staying in the upper part of the drain tank T into the end chamber 62 as the spraying steam S3. (High pressure fluid line) 75 is connected. The spraying steam line 75 is provided with a flow rate adjusting valve 76 that adjusts the flow rate of the spraying steam S3 passing therethrough.

次に、以上で説明した湿分分離加熱設備4での蒸気及びドレンの流れについて説明する。   Next, the flow of steam and drain in the moisture separation heating equipment 4 described above will be described.

図1〜図3及び図6に示すように、高圧蒸気タービン3(図8参照)で使用された被加熱蒸気Sが蒸気入口11から蒸気受入室21内へ流入すると、この被加熱蒸気Sは、バッフルプレート50で蒸気受入室21内への流入時の衝撃を緩和されながら、上方で且つ横幅方向Wの両側に案内されて、供給マニホールド室22内へ流入する。   As shown in FIGS. 1 to 3 and 6, when the heated steam S used in the high-pressure steam turbine 3 (see FIG. 8) flows from the steam inlet 11 into the steam receiving chamber 21, the heated steam S is The baffle plate 50 is guided to the upper side and both sides in the lateral width direction W while flowing into the supply manifold chamber 22 while mitigating the impact when flowing into the steam receiving chamber 21 by the baffle plate 50.

供給マニホールド室22内へ流入した被加熱蒸気Sは、図4及び図5に示すように、分配板36のスリット37を介して湿分分離室23内に流入する。湿分分離室23内では、被加熱蒸気Sがミストセパレータ53を構成する複数の波板及び邪魔板等に接触することで、この被加熱蒸気S中の湿分が複数の波板及び邪魔板に捕捉され、下方に流れ落ち、底板38の開口39から蒸気ドレン回収室25内に流れ込む。蒸気ドレン回収室25に流れ込んだ湿分、つまり蒸気ドレンDは、一部の被加熱蒸気Sと共に、蒸気ドレン排出口13から流出し、ドレンタンクT内に流れ込む。   As shown in FIGS. 4 and 5, the heated steam S that has flowed into the supply manifold chamber 22 flows into the moisture separation chamber 23 through the slits 37 of the distribution plate 36. In the moisture separation chamber 23, the heated steam S comes into contact with a plurality of corrugated plates and baffle plates constituting the mist separator 53, so that the moisture in the heated steam S becomes a plurality of corrugated plates and baffle plates. Then, it flows downward and flows into the steam drain recovery chamber 25 from the opening 39 of the bottom plate 38. The moisture that has flowed into the steam drain recovery chamber 25, that is, the steam drain D, flows out from the steam drain outlet 13 together with a part of the steam S to be heated, and flows into the drain tank T.

一方、ミストセパレータ53を通過した被加熱蒸気Sは、加熱室24内に流入して、この加熱室24内を上方に流れる過程で、第一加熱器55A及び第二加熱器55Bにより加熱され、過熱蒸気HSになる。この過熱蒸気HSは、加熱室24から蒸気回収マニホールド室26に流入した後、蒸気出口12から外部に流出する。この湿分分離加熱器Mから流出した過熱蒸気HSは、低圧蒸気タービン5(図8参照)に送られる。   On the other hand, the heated steam S that has passed through the mist separator 53 flows into the heating chamber 24 and is heated by the first heater 55A and the second heater 55B in the process of flowing upward in the heating chamber 24, It becomes superheated steam HS. The superheated steam HS flows from the heating chamber 24 into the steam recovery manifold chamber 26 and then flows out from the steam outlet 12. The superheated steam HS flowing out from the moisture separator / heater M is sent to the low-pressure steam turbine 5 (see FIG. 8).

ドレンタンクT内に流入した蒸気ドレンD及び一部の被加熱蒸気Sは、図7に示すように、気相と液相とに分かれてドレンタンクT内に一時的に溜まる。このドレンタンクT内の圧力P4は、湿分分離加熱器Mのドレン回収室や加熱室内の圧力P1,P2とほぼ同じである。一方、湿分分離加熱器Mの端室62内の圧力P3は、蒸気ドレン回収室25や加熱室24内の圧力P1,P2よりはるかに低いため、ドレンタンクT内の圧力P4に対してもはるかに低い。このため、ドレンタンクT内の上部に滞留している気相の流体(高圧流体)、つまり吹付用蒸気S3は、このドレンタンクTの上部に形成されている蒸気排出口72、吹付用蒸気ライン(高圧流体ライン)75、湿分分離加熱器Mのノズル63を介して、湿分分離加熱器Mの端室62の下方から端室62内に噴出する。   As shown in FIG. 7, the steam drain D flowing into the drain tank T and a part of the steam S to be heated are divided into a gas phase and a liquid phase and temporarily accumulated in the drain tank T. The pressure P4 in the drain tank T is substantially the same as the pressures P1 and P2 in the drain recovery chamber and the heating chamber of the moisture separation heater M. On the other hand, the pressure P3 in the end chamber 62 of the moisture separation heater M is much lower than the pressures P1 and P2 in the steam drain recovery chamber 25 and the heating chamber 24. Much lower. For this reason, the gas-phase fluid (high-pressure fluid) staying in the upper part of the drain tank T, that is, the spraying steam S3, is formed in the steam discharge port 72 and the spraying steam line formed in the upper part of the drain tank T. (High-pressure fluid line) 75 and the nozzle 63 of the moisture separator / heater M are ejected into the end chamber 62 from below the end chamber 62 of the moisture separator / heater M.

ところで、端室62は、ノズル63が設けられていない場合、蒸気が流れる経路の一部を成さないため、この端室62には、基本的に、蒸気は流入しない。しかしながら、前述したように、加熱室24の圧力P1,P2は端室62の圧力P3より高いため、端仕切板60と各加熱器55A,55Bの伝熱管56との隙間から加熱室24内の被加熱蒸気Sが流入する。特に、端仕切板60と第一加熱器55Aの伝熱管56との隙間から加熱室24内の被加熱蒸気Sが流入する。これは、被加熱蒸気Sにとって、第一加熱器55Aは第二加熱器55Bよりも上流側に位置しているため、第一加熱器55Aの伝熱管56の周りの被加熱蒸気Sの圧力P1が、第二加熱器55Bの伝熱管56周りの被加熱蒸気の圧力P2よりも僅かに高いからである。   By the way, when the nozzle 63 is not provided, the end chamber 62 does not form a part of the path through which the steam flows. Therefore, the steam basically does not flow into the end chamber 62. However, as described above, since the pressures P1 and P2 in the heating chamber 24 are higher than the pressure P3 in the end chamber 62, the gap between the end partition plate 60 and the heat transfer tubes 56 of the heaters 55A and 55B is increased in the heating chamber 24. The heated steam S flows in. In particular, the heated steam S in the heating chamber 24 flows from the gap between the end partition plate 60 and the heat transfer tube 56 of the first heater 55A. This is because the first heater 55A is located upstream of the second heater 55B with respect to the heated steam S, and therefore the pressure P1 of the heated steam S around the heat transfer pipe 56 of the first heater 55A. This is because the pressure P2 of the steam to be heated around the heat transfer tube 56 of the second heater 55B is slightly higher.

加熱室24から端室62内に流入した蒸気は、凝縮しドレンとして端室62内に溜まる。端室62内のドレン量が多くなり、端室62内のドレンレベルが高くなると、端室62内に位置している第一加熱器55Aのボンネット58の上部や蒸気供給管58iとドレンとが接触することになる。この結果、第一加熱器55Aの蒸気供給管58iや蒸気受入室59a内を流れる第一加熱用蒸気S1が冷却され、被加熱蒸気Sの加熱効率が低下する。このため、端室62内にドレンが溜まることは好ましくない。   The steam that flows into the end chamber 62 from the heating chamber 24 is condensed and accumulated in the end chamber 62 as a drain. When the amount of drain in the end chamber 62 increases and the drain level in the end chamber 62 increases, the upper part of the hood 58 of the first heater 55A located in the end chamber 62 and the steam supply pipe 58i and the drain Will be in contact. As a result, the first heating steam S1 flowing in the steam supply pipe 58i and the steam receiving chamber 59a of the first heater 55A is cooled, and the heating efficiency of the heated steam S is reduced. For this reason, it is not preferable that drain is accumulated in the end chamber 62.

本実施形態では、吹付用蒸気ライン75中の流量調節弁76が開いていれば、ドレンタンクT内の蒸気が吹付用蒸気S3として端室62内に噴出するので、端室62内の圧力が高まり、端仕切板60と各加熱器55A,55Bの伝熱管56との隙間から端室62内に流入する加熱室24内の被加熱蒸気Sの量が少なくなる。   In the present embodiment, if the flow rate regulating valve 76 in the spraying steam line 75 is open, the steam in the drain tank T is sprayed into the end chamber 62 as the spraying steam S3, so that the pressure in the end chamber 62 is The amount of the heated steam S in the heating chamber 24 flowing into the end chamber 62 from the gap between the end partition plate 60 and the heat transfer tubes 56 of the heaters 55A and 55B is reduced.

また、仮に、端室62の底にドレンが溜まっていても、端室62の下方から端室62内に噴出する吹付用蒸気S3により、このドレンが吹き飛ばされ、その一部が第一加熱器55Aのボンネット58の下面や蒸気ドレン管58oに接する。しかも、蒸気ドレン管58oは、図1及び図7に示すように、端室62内で蛇行し、端室62内での管長が長いため、吹き飛ばされたドレンは、この蒸気ドレン管58oとの接触率が高くなる。この第一加熱器55Aのボンネット58内や蒸気ドレン管58o内には、第一加熱器55Aの伝熱管56に供給された高温の第一加熱用蒸気S1、又はそのドレンが流れるため、第一加熱器55Aのボンネット58の下面や蒸気ドレン管58oは、端室62の底に溜まったドレンよりもはるかに温度が高い。このため、第一加熱器55Aのボンネット58の下面や蒸気ドレン管58oに接したドレンは、気化して蒸気となる。この蒸気の一部は、例えば、端仕切板60と第二加熱器55Bの伝熱管56との隙間から加熱室24内に流入し、他の一部は、端仕切板60の空気抜き孔61から加熱室24よりもさらに圧力の低い蒸気回収マニホールド室26内に流入する。   Even if drain is accumulated at the bottom of the end chamber 62, the drain is blown off by the spraying steam S <b> 3 sprayed into the end chamber 62 from below the end chamber 62, and a part of the drain is blown away from the first heater. It contacts the lower surface of the 55A bonnet 58 and the steam drain pipe 58o. Moreover, as shown in FIGS. 1 and 7, the steam drain pipe 58o meanders in the end chamber 62, and the length of the pipe in the end chamber 62 is long. Therefore, the blown drain is separated from the steam drain pipe 58o. Increases contact rate. The high-temperature first heating steam S1 supplied to the heat transfer pipe 56 of the first heater 55A or its drain flows in the hood 58 and the steam drain pipe 58o of the first heater 55A. The lower surface of the bonnet 58 of the heater 55 </ b> A and the steam drain pipe 58 o are much higher in temperature than the drain accumulated at the bottom of the end chamber 62. For this reason, the drain in contact with the lower surface of the bonnet 58 of the first heater 55A and the steam drain pipe 58o is vaporized to become steam. A part of this steam flows into the heating chamber 24 through a gap between the end partition plate 60 and the heat transfer tube 56 of the second heater 55B, for example, and another part from the air vent hole 61 of the end partition plate 60. It flows into the steam recovery manifold chamber 26 having a pressure lower than that of the heating chamber 24.

したがって、本実施形態では、端室62の底にドレンが溜まっていても、これを気化させて端室62外に流出させることができる。   Therefore, in the present embodiment, even if drain is accumulated at the bottom of the end chamber 62, it can be vaporized and flowed out of the end chamber 62.

よって、本実施形態では、湿分分離加熱器Mの端室62内に溜まるドレンの量を少なくすることができる。しかも、湿分分離加熱器Mを設置した場合に、この設置と合わせて設置されるドレンタンクTを、端室62内に溜まったドレンを吹き飛ばす高圧流体の供給源としているため、設備コストの増加を抑えることができる。   Therefore, in the present embodiment, the amount of drain accumulated in the end chamber 62 of the moisture separation heater M can be reduced. In addition, when the moisture separator / heater M is installed, the drain tank T installed together with the installation is used as a supply source of high-pressure fluid for blowing away the drain accumulated in the end chamber 62, so that the equipment cost increases. Can be suppressed.

なお、吹付用蒸気ライン75中の流量調節弁76は、常時開けておいてもよいが、定期的に一時的に開けるようにしてもよい。   In addition, although the flow control valve 76 in the steam line 75 for spraying may be always opened, you may make it open temporarily temporarily.

「湿分分離加熱器の変形例」
次に、以上で説明した湿分分離加熱器の変形例について、図9を用いて説明する。
"Modification of moisture separator heater"
Next, a modification of the moisture separation heater described above will be described with reference to FIG.

本変形例の湿分分離加熱器Mは、ノズル63から端室62内に噴出した吹付用蒸気S3を積極的に第一加熱器55Aの蒸気ドレン管58oに導くガイド部材65を設けたものである。   The moisture separation heater M of this modification is provided with a guide member 65 that actively guides the spraying steam S3 ejected from the nozzle 63 into the end chamber 62 to the steam drain pipe 58o of the first heater 55A. is there.

ガイド部材65がない場合、前述したように、端室62の底に溜まったドレンは、ノズル63から端室62内に噴出した吹付用蒸気S3により、第一加熱器55Aのボンネット58の下面や蒸気ドレン管58oに接する。第一加熱器55Aにおけるボンネット58内の蒸気回収室59bでは、第一加熱器55Aの伝熱管56に供給された第一加熱用蒸気S1及び/又はそのドレンが一時的に滞留している。一方、この第一加熱器55Aの蒸気ドレン管58o内では、第一加熱用蒸気S1及び/又はそのドレンが蒸気回収室59b内でのドレンの流速よりも高い流速で流れている。したがって、ボンネット58の内外の流体の熱交換率よりも、蒸気ドレン管58oの内外の流体の熱交換率の方が高い。   When there is no guide member 65, as described above, the drain accumulated in the bottom of the end chamber 62 is sprayed from the nozzle 63 into the end chamber 62 by the blowing steam S3, and the lower surface of the bonnet 58 of the first heater 55A It contacts the steam drain pipe 58o. In the steam recovery chamber 59b in the hood 58 of the first heater 55A, the first heating steam S1 and / or its drain supplied to the heat transfer pipe 56 of the first heater 55A is temporarily retained. On the other hand, in the steam drain pipe 58o of the first heater 55A, the first heating steam S1 and / or the drain thereof flows at a higher flow rate than the drain flow rate in the steam recovery chamber 59b. Therefore, the heat exchange rate of the fluid inside and outside the steam drain pipe 58o is higher than the heat exchange rate of the fluid inside and outside the bonnet 58.

そこで、本変形例では、ガイド部材65により、ノズル63から端室62内に噴出した吹付用蒸気S3を積極的に第一加熱器55Aの蒸気ドレン管58oに導くことで、端室62の底に溜まったドレンと蒸気ドレン管58oとの接触率を高めている。この結果、本変形例では、端室62の底に溜まったドレンを効率的に気化させることができる。   Therefore, in the present modification, the guide member 65 positively guides the spraying steam S3 ejected from the nozzle 63 into the end chamber 62 to the steam drain pipe 58o of the first heater 55A, so that the bottom of the end chamber 62 The contact rate between the drain accumulated in the steam and the steam drain pipe 58o is increased. As a result, in this modification, the drain accumulated at the bottom of the end chamber 62 can be efficiently vaporized.

なお、以上の実施形態及び変形例では、湿分分離加熱器MのドレンタンクTを高圧流体供給源とし、このドレンタンクT内の吹付用蒸気S3を高圧流体として、湿分分離加熱器Mの端室62に噴出させるが、蒸気プラントにおける他の高圧流体供給源からの蒸気を高圧流体として、湿分分離加熱器Mの端室62に噴出させるようにしてもよい。このように構成しても、蒸気プラント中には、湿分分離加熱器Mの端室62内の圧力よりも高い蒸気を保有する機器等が多数存在するため、内圧が端室62の圧力以下のドレンタンクを別途設けるよりも、設備コストの増加を抑えることができる。   In the embodiment and the modification described above, the drain tank T of the moisture separation heater M is used as a high-pressure fluid supply source, and the spraying steam S3 in the drain tank T is used as a high-pressure fluid. Although it is made to inject into the end chamber 62, you may make it inject into the end chamber 62 of the moisture separation heater M as a high pressure fluid from the high pressure fluid supply source in a steam plant. Even in such a configuration, in the steam plant, there are many devices that have steam higher than the pressure in the end chamber 62 of the moisture separation heater M, so the internal pressure is equal to or lower than the pressure in the end chamber 62. Therefore, it is possible to suppress the increase in equipment cost compared to the case of separately providing the drain tank.

3:高圧蒸気タービン、4:湿分分離加熱設備、5:低圧蒸気タービン、10:容器、11:蒸気入口、12:蒸気出口、15:胴体、16:鏡、20:蒸気室、21:蒸気受入室、22:供給マニホールド室、23:湿分分離室、24:加熱室、25:蒸気ドレン回収室、26:蒸気回収マニホールド室、30:天井板、33:横仕切板、35:傾斜板、36:分配板、38:底板、43:縦仕切板、44:囲い板、50:バッフルプレート、53:ミストセパレータ、55:加熱器、55A:第一加熱器、55B:第二加熱器、56:伝熱管、58:ボンネット、58i:蒸気供給管、58o:蒸気ドレン管、59:仕切板、59a:蒸気受入室、59b:蒸気回収室、60:端仕切板(又は、仕切板)、61:空気抜き孔、62:端室、63:ノズル、65:ガイド部材、75:吹付用蒸気ライン、76:流量調節弁、M:湿分分離加熱器、T:ドレンタンク(高圧流体供給源)、S:被加熱蒸気、HS:過熱蒸気、S1:第一加熱用蒸気、S2:第二加熱用蒸気、S3:吹付用蒸気(高圧流体)   3: high pressure steam turbine, 4: moisture separation heating equipment, 5: low pressure steam turbine, 10: container, 11: steam inlet, 12: steam outlet, 15: fuselage, 16: mirror, 20: steam chamber, 21: steam Receiving chamber, 22: supply manifold chamber, 23: moisture separation chamber, 24: heating chamber, 25: steam drain recovery chamber, 26: steam recovery manifold chamber, 30: ceiling plate, 33: horizontal partition plate, 35: inclined plate 36: Distributing plate, 38: Bottom plate, 43: Vertical partition plate, 44: Enclosure plate, 50: Baffle plate, 53: Mist separator, 55: Heater, 55A: First heater, 55B: Second heater, 56: heat transfer pipe, 58: bonnet, 58i: steam supply pipe, 58o: steam drain pipe, 59: partition plate, 59a: steam receiving chamber, 59b: steam recovery chamber, 60: end partition plate (or partition plate), 61: Air vent hole, 62: End chamber 63: Nozzle, 65: Guide member, 75: Steam line for spraying, 76: Flow control valve, M: Moisture separation heater, T: Drain tank (high pressure fluid supply source), S: Steam to be heated, HS: Overheating Steam, S1: First heating steam, S2: Second heating steam, S3: Spraying steam (high pressure fluid)

Claims (5)

水平な軸方向に延び、該軸方向の両端が封止されて、内部に被加熱蒸気が流入する筒状の容器と、
前記容器内を前記軸方向で分割して、端室と前記被加熱蒸気が流入する蒸気室とに仕切る端仕切板と、
前記端仕切板を貫通し、一部が前記端室内に位置し、他の一部が前記蒸気室内に位置して、該蒸気室内に流入した前記被加熱蒸気を加熱用蒸気で加熱する加熱器と、
を備え、
前記加熱器には、前記被加熱蒸気と熱交換した前記加熱用蒸気及び/又はそのドレンを前記端室を経て前記容器外に排出する蒸気ドレン管が設けられ、
前記容器には、前記端室の圧力よりも高い圧力の高圧流体を供給する高圧流体供給源と接続され、前記端室の下方から該端室内に貫通し、前記高圧流体を該端室内に噴出するノズルが設けられている、
ことを特徴とする湿分分離加熱器。
A cylindrical container extending in a horizontal axial direction, sealed at both ends in the axial direction, into which heated steam flows; and
An end partition plate that divides the inside of the container in the axial direction and partitions the end chamber into a steam chamber into which the steam to be heated flows;
A heater that penetrates through the end partition plate, a part thereof is located in the end chamber, and another part is located in the steam chamber, and heats the heated steam flowing into the steam chamber with heating steam. When,
With
The heater is provided with a steam drain pipe for discharging the heating steam and / or its drain exchanged with the steam to be heated out of the container through the end chamber,
The container is connected to a high-pressure fluid supply source that supplies a high-pressure fluid having a pressure higher than that of the end chamber, penetrates the end chamber from below the end chamber, and ejects the high-pressure fluid into the end chamber. A nozzle is provided,
A moisture separator and heater.
請求項1に記載の湿分分離加熱器において、
前記ノズルから前記端室内に噴出された前記高圧流体が前記蒸気ドレン管に向かうよう、該高圧流体をガイドするガイド部材を備えている、
ことを特徴とする湿分分離加熱器。
The moisture separator heater according to claim 1,
A guide member for guiding the high-pressure fluid from the nozzle so that the high-pressure fluid ejected into the end chamber is directed to the vapor drain pipe;
A moisture separator and heater.
請求項1又は2に記載の湿分分離加熱器において、
前記蒸気ドレン管は、前記端室内で蛇行している、
ことを特徴とする湿分分離加熱器。
In the moisture separation heater according to claim 1 or 2,
The steam drain pipe meanders in the end chamber.
A moisture separator and heater.
請求項1から3のいずれか一項に記載の湿分分離加熱器と、
前記湿分分離加熱器の前記蒸気室内の下部に溜まったドレンを受け入れる、前記高圧流体供給源としてのドレンタンクと、
前記ドレンタンクの上部と前記ノズルとを接続し、該ドレンタンク内の蒸気を前記高圧流体として前記ノズルに供給する高圧流体ラインと、
を備えていることを特徴とする湿分分離加熱設備。
A moisture separator and heater according to any one of claims 1 to 3;
A drain tank as the high pressure fluid supply source that receives drain accumulated in the lower part of the steam chamber of the moisture separator and heater;
A high-pressure fluid line that connects the upper part of the drain tank and the nozzle, and supplies steam in the drain tank to the nozzle as the high-pressure fluid;
A moisture separation heating facility characterized by comprising:
請求項4に記載の湿分分離加熱設備において、
前記高圧流体ラインには、前記ドレンタンク内から前記ノズルを介して前記端室内に供給される前記蒸気の流量を調節する流量調節弁が設けられている、
ことを特徴とする湿分分離加熱設備。
In the moisture separation heating equipment according to claim 4,
The high-pressure fluid line is provided with a flow rate adjusting valve for adjusting the flow rate of the steam supplied from the drain tank through the nozzle to the end chamber.
Moisture separation and heating equipment characterized by that.
JP2013006110A 2013-01-17 2013-01-17 Moisture separation heater and moisture separation heating equipment provided with the same Expired - Fee Related JP5984687B2 (en)

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JP2013006110A JP5984687B2 (en) 2013-01-17 2013-01-17 Moisture separation heater and moisture separation heating equipment provided with the same
EP14740991.6A EP2947385B1 (en) 2013-01-17 2014-01-07 Moisture separating and heating device and moisture separating and heating facility provided with same
PCT/JP2014/050089 WO2014112408A1 (en) 2013-01-17 2014-01-07 Moisture separating and heating device and moisture separating and heating facility with same
CN201480003580.8A CN104870893B (en) 2013-01-17 2014-01-07 Dampness separating heater and possess the dampness separated heating equipment of dampness separating heater

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Also Published As

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EP2947385A1 (en) 2015-11-25
EP2947385A4 (en) 2016-11-16
WO2014112408A1 (en) 2014-07-24
CN104870893B (en) 2016-11-02
EP2947385B1 (en) 2017-10-18
JP5984687B2 (en) 2016-09-06
CN104870893A (en) 2015-08-26

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