JPS5864485A - Condenser - Google Patents

Abstract

PURPOSE:To keep the titled device clean and to prevent condensed water from flowing rapidly into purification devices by a method wherein in the condenser used in a thermoelectric power plant, a gate valve is provided between a heat exchanger and a condensed water pool and the upstream side of the gate valve is branch-connected to a first hot well through a re-circulation valve. CONSTITUTION:When the condenser is re-started after it is stopped for a long time, the gate valve 13 is closed to the full and the re-circulation valve 14 is opened slightly to thereby start a circulation pump 4. With the starting of the condenser, water in the first hot well 3 flows through the purification devices 5 and 6, the heat exchanger 7, the re-circulation valve 14 and a re-circulation pipe 15 and returns to the first hot well 3. The above circulation of the water is repeated while the re-circulation valve 14 is opened gradually so that the rapid fluctuation of the flow rate of the water through the purification devices is prevented. Then, after the water is condensed and purified, the gate valve 13 is opened and the re-circulation valve 14 is closed so as to introduce the water into a second hot well 9 through the condensed water pool 8. As a consequence, it is possible to prevent the condensed water pool from being contaminated by non-purified condensed water and to prevent the condensed water from flowing rapidly into the purification devices.

Description

【発明の詳細な説明】 本発明は、火力および原子力発電プラｙトにおける復水
装置に係わり、とくに復水器で凝縮した復水を、一旦、
復水器と別置の復水浄化装置を通し、復水溜に貯水した
後、再び復水器に戻してから、蒸気発生装置に送水する
ようにした復水装置の改喪に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a condensing device in a thermal power plant or a nuclear power plant.
This invention relates to the modification of a condensate device in which water is passed through a condenser and a separate condensate purification device, stored in a condensate reservoir, returned to the condenser, and then sent to a steam generator.

従来、火力および原子力発電プラントの復水系統は、タ
ービンの排気蒸気を間接冷却する復水器。Conventionally, condensation systems in thermal and nuclear power plants use condensers to indirectly cool turbine exhaust steam.

凝縮した復水な昇圧し送水するボ／ブ、復水の浄化を目
的とする復水浄化装置および熱交換器等で構成されてい
る。この復水系統に関し最近、次の　−ような技術が提
唱されている。It consists of a tube that increases the pressure of condensed water and sends it, a condensate purification device for the purpose of purifying condensate, a heat exchanger, etc. Regarding this condensate system, the following technologies have recently been proposed.

第１図は従来の代表的な復水装置であって、蒸気タービ
ン／からの排気蒸気は、復水器２で間接冷却され、ここ
で凝縮して復水となり、第１ホツトウエルＪに集められ
る。そこで集められたり水は、循環ポンプ参により、抽
出、昇圧され、り水浄化装置ｚ、ｔＫ送られる。浄化さ
れた復水は熱交換器７を経て、復水溜ｌで一旦貯水され
た後に、靜水頭差により、彷水器コ内に画成された第コ
ホットウェル２に送水される。復水溜ｔは系統内の圧力
を常に飽和圧力以上とし、系統内圧必要な圧力を付加す
るための貯水槽であり、系統内の十分高い位置に設置さ
れており、＠水溜を内圧力は、バランス管１０Ｋよって
復水器とバランスされている。さらに第１ホツトウエル
３内の復水は、ポンプ／／により昇圧され、図示しない
熱交換器郷を＃￥で、図示しない蒸気発生器へ給水され
る。Fig. 1 shows a typical conventional condensing system, in which exhaust steam from a steam turbine is indirectly cooled in a condenser 2, where it is condensed to form condensate, and collected in a first hot well J. . The water collected there is extracted and pressurized by a circulation pump, and then sent to water purification devices z and tK. The purified condensate passes through the heat exchanger 7 and is once stored in the condensate reservoir 1, and then is sent to the co-hot well 2 defined in the water collector 2 due to the difference in water head. The condensate tank is a water storage tank that always keeps the pressure in the system above the saturation pressure and adds the necessary pressure to the system internal pressure.It is installed at a sufficiently high position in the system, and the internal pressure of the water tank It is balanced with the condenser by pipe 10K. Further, the pressure of the condensate in the first hot well 3 is increased by a pump, and the water is supplied to a steam generator (not shown) through a heat exchanger (not shown) at #¥.

しかして、復水浄化装置！、６を含む系統を。However, a condensate purification device! , a strain containing 6.

蒸気発生器へ直接復水給水として、送水する系統と別に
独立して設置することは、循環ポンプμあるいは復水浸
化装ｆｉｌｌ、を等の機器に異常があった場合にも、第
コホットウェル２に貯えた復水があるため、一時に蒸気
発生器に影響を及ぼさずに。Installing a direct condensate water supply to the steam generator, separate from the water supply system, is a good idea if there is an abnormality in the circulation pump μ or condensate immersion system fill, etc. Because there is condensate stored in 2, it does not affect the steam generator at the same time.

すみやかな制御、操作を行なうことがで舞る。またプラ
ント出力と関係なく、俵水浄化装＠ｊ、ｔを通るり水流
量を一定にすることができるため、復水浄化装置ｊ、４
の浄化能力を高く雑持することができる。Allows quick control and operation. Also, regardless of the plant output, the flow rate of water passing through the bale water purifiers @j, t can be kept constant, so the condensate water purifiers j, 4
It can have a high purification ability.

しかしながら、上記の従来例においては、復水浄化装ｆ
ｉｔｔｅ＆を通った復水は、必らず麹水溜ｒおよび復水
器コ内の第２ホツトウエルタに戻る構成をなしている。However, in the above conventional example, the condensate purification device f
The condensate that has passed through the condensate always returns to the koji water reservoir and the second hot welter in the condenser.

このため１例えばプラント建設当初のように１機器、配
管内を十分に洗浄していない状態で、系統の運転を行な
うと、系統内の異物や配管内の錆等が、り水溜ｒや第１
ホツトウエル３に混入する虞れがある。またプラントの
長期停止後の再起動を行なう場合も、系統内圧は腐食生
成物が多いため、復水浄化装＠ｔｒ、Ａで十分除去せず
に、復水溜！や第２ホツトウエルタに持ち込む場合があ
る。For this reason, if the system is operated without thoroughly cleaning the inside of each piece of equipment and piping, as was the case at the time of plant construction, for example, foreign objects in the system, rust in the piping, etc.
There is a possibility that it may get mixed into the hot well 3. Also, when restarting a plant after a long-term shutdown, the system internal pressure contains a lot of corrosion products, so the condensate is not sufficiently removed by the condensate purification system @tr, A. In some cases, they may be brought to the second Hothuerta.

復水溜ｒや第１ホツトウエル３に貯水した復水け、蕩気
発生＠鴬に送水するため、常圧清浄な状態を保つ必要が
ある。しかるに従来例によると、異物や腐食生成物を復
水溜ｇや第１ホツトウエル３を経て、蒸り発生器側まで
持ち込むという欠膚がある。また、第７１網の構成にお
いて、復水浄化装Ｗり、ｔを含む系統の起動を行なう場
合、ｆＩｉｔ環ポンプダを起動させると、系新内に衰激
に彷氷が流入し、り水浄化装置ｊ、ｔを流れる後水流量
が、一時的に大幅に変動する。復水浄化装置ｊ、ｔの機
能上、装置内の樹脂漏洩防止のために２通水開始時には
流量を徐々に増加させることが望ましい。In order to send water to the condensate reservoir R and the first hot well 3, and to the fume generated @Umugi, it is necessary to maintain a clean state under normal pressure. However, the conventional method has a drawback in that foreign matter and corrosion products are brought into the steam generator through the condensate reservoir g and the first hot well 3. In addition, in the configuration of the 71st network, when starting up the system including the condensate purification equipment W and T, when the fIit ring pumper is started, ice rapidly flows into the system, and the condensate water purification system is The flow rate of water flowing through devices j and t temporarily fluctuates significantly. In view of the functionality of the condensate purification devices j and t, it is desirable to gradually increase the flow rate at the start of the second water flow in order to prevent resin leakage within the device.

し、かるに従来例においては、循環ボンプグを起動させ
ると、一時的ながら復水浄化獲置ｔ、ｊＫ急。However, in the conventional example, when the circulation pump is activated, the condensate is purified rapidly, albeit temporarily.

激に復水が通水し、排水溜ｔＫ流入するという欠点があ
る。There is a drawback that condensate flows rapidly and flows into the drainage basin tK.

本発明は、このような点Ｋｔｔ！みてなされたもので、
系統内水質が浄化されていない場合も、復水溜や第２ホ
ツトウエル内を清＃に保ち、かつ復水浄化装置への急激
な復水流入を防止することがで六る復水装置を提供する
ことを目的とし、物水器の底部に画成した第１および第
２のホットウェルを有し、第７ホツトウエルに貯水ｌま
た復水を、一旦、復水器と別置の復水浄化装置を通し、
今水泗に貯水した後、第２ホツトウエルに送給するよう
にしたゆ水装置において、熱交換器から啓水溜に到る、
復水浄化配管上に隔離弁を１設するとともＫ、上記隔離
弁の上流側から分岐し、再循環弁を介設して第２ホツト
ウエルに連結する、再循環配管を設けたことを特徴とし
、また、再循環配管上に介設した再循環弁に代えて、再
循環流量調節弁を設置し、復水浄化配管上に流量検出器
を配設し、その流量検出器からの発信信号を入力し７て
、上記再循環流量調節弁の開度制御を行なう、流量制御
装輩を追設したことを特徴とする。The present invention is directed to such points Ktt! It was done by looking at
To provide a condensate device that can keep a condensate reservoir and a second hot well clean even when the water quality in a system is not purified, and can prevent condensate from rapidly flowing into a condensate purification device. For this purpose, it has first and second hot wells defined at the bottom of the water dispenser, and the seventh hot well stores water and condensate, and once the water is stored in the seventh hot well, it is transferred to a condensate purification device installed separately from the condenser. Through
In a water supply system that stores water in a water tank and then sends it to a second hot well, from the heat exchanger to the water tank,
In addition to installing one isolation valve on the condensate purification pipe, a recirculation pipe is also provided that branches from the upstream side of the isolation valve and connects to the second hot well with a recirculation valve interposed. In addition, a recirculation flow rate control valve is installed in place of the recirculation valve installed on the recirculation piping, and a flow rate detector is installed on the condensate purification piping, and the transmission signal from the flow rate detector is The present invention is characterized in that a flow rate control device is additionally installed to control the opening degree of the recirculation flow rate control valve based on input data.

以下第一図を参照して本発明の一実施例について駁明す
る。なお第１図と同一部分については、回−符号を付し
その紗明を省略する。An embodiment of the present invention will be explained below with reference to FIG. Note that the same parts as in FIG. 1 are denoted by reference numerals, and their illustrations are omitted.

第一図において、熱交換器７から作水溜ｒＫ到る。和水
浄化１管／コ上の復水溜ｒ入口端に、隔離弁１３が配設
されるとともＫ、上記復水浄化配管／コ上の、隔離弁１
３の上流側から分岐されて、再循環弁／ダを介して復水
器２の第１ホツトウエル３に接続される再循環が管／３
が設けられている。In Figure 1, a water reservoir rK is reached from the heat exchanger 7. An isolation valve 13 is provided at the inlet end of the condensate reservoir r on the Japanese water purification pipe 1.
A recirculation pipe branched from the upstream side of pipe /3 and connected to the first hot well 3 of the condenser 2 via a recirculation valve /da
is provided.

しかして、プラント建設当初あるいは、プラントの長期
停止後に再起動する場合、前記隔離弁／３を全閉とし、
再循環弁／ｌを微少開窄として、循環ポンプグを起動す
る。これによりり水器コ内の第ｌホットウェル３から循
環ポンプ参で抽出、昇圧したり水は、復水浄化装置！、
６、熱交換器７を経て、再循環弁／ｌおよび再循環配管
／Ｊを通って、第１ホツトウエル３に流入する。第１ホ
ツトウエルＪに戻った復水は、再び循瑠ポンプ≠で抽圧
し、復水浄化装置！、ｔおよび熱交換器７を通って。Therefore, when the plant is first constructed or restarted after a long-term shutdown, the isolation valve/3 is fully closed.
The recirculation valve/l is slightly opened and the circulation pump is started. As a result, water can be extracted from the first hot well 3 in the water tank using the circulation pump, pressurized, and the water can be extracted from the condensate purification device! ,
6. After passing through the heat exchanger 7, it flows into the first hot well 3 through the recirculation valve /l and the recirculation pipe /J. The condensate that has returned to the first hot well J is extracted again by the circulation pump≠, and the condensate purification system is completed! , t and through the heat exchanger 7.

循環を繰り返す。循瑠ポンプぴの起動後は、再循環弁／
４１の開度を徐々に増加させることにより、復水浄化装
置！Ｉ４への通水流量は、急激な変動を避けて、徐々に
増加させることができる。再循環弁／＆の操作により、
復水の再循環流量が規定値に達したならば、復水浄化装
置ｊ、ｔにて、系統内の異物や腐食生成物を除宍する復
水浮化運転を行なう。Repeat the cycle. After starting the circulation pump, the recirculation valve/
Condensate purification device by gradually increasing the opening of 41! The water flow rate to I4 can be increased gradually, avoiding sudden fluctuations. By operating the recirculation valve /&,
When the recirculation flow rate of condensate reaches a specified value, the condensate purifiers j and t perform a condensate flotation operation to remove foreign matter and corrosion products in the system.

このように再循環運転を行ない、復水が十分に清浄にな
った後、隔離弁／３を徐々に全開とし、再循環弁／ｌを
徐々に全閉とすると、熱交換器７を通った復水は、彷水
溜ｒＫ流入した後に、第２ホツトウエルデ忙流入する。After the recirculation operation is performed in this way and the condensate becomes sufficiently clean, the isolation valve /3 is gradually fully opened and the recirculation valve /1 is gradually fully closed. After the condensate flows into the sump rK, it flows into the second hot weld.

なお蒸気発生器の運転を開始する際には、従来技研の場
合と同様Ｋ、第コホットウェルタに貯水した復水は、ボ
ンダ／ｌを起動し、蒸気発生益側に給水する。In addition, when starting the operation of the steam generator, the condensate stored in the K and No. 1 cohot welter starts the bonder/l and supplies water to the steam generation side, as in the case of the conventional Giken.

斯くして、任意［０水の浄化運転を、復水溜ｒや第コホ
ｙ）ウェルタに通水せずに行ない、系統内の機器、配管
の洗浄を十分に実施することができる。また系統の起動
時に復水浄化装置ｊ、ｔへの通水流量を徐々に変化させ
ることが可能であるため、復水浄化装置！、乙の機能を
損う虞れもな１／’ａ 次いで第３図を参戸して、本発明の他の実施例について
峠、明する。なお、第１図と同一部分については、同一
符号を付１．そのＰ明を省略する。In this way, any water purification operation can be carried out without passing water to the condensate reservoir or the first welter, and the equipment and piping within the system can be sufficiently cleaned. Also, since it is possible to gradually change the flow rate of water to the condensate purification devices j and t when the system is started, the condensate purification device! , there is no risk of impairing the functions of B.Next, referring to FIG. 3, another embodiment of the present invention will be explained. The same parts as in FIG. 1 are designated by the same reference numerals. Omit the P.

第３図において、第２図における再循環弁／Ｕに代えて
、再循環流！−節弁／６が設置上れている。In FIG. 3, the recirculation valve /U in FIG. 2 is replaced by a recirculation flow! -Set valve/6 has been installed.

市たり水浄化配管／ｊ上の熱交換器７出ロ端部には、流
量検出器／７が設置され、その流へ１検出器１７からの
発信信号は、法号制御装置ｌざに入力される。この流量
制御装ｆ＃Ｉｌざにより、上記再循環流量調節弁／６の
開度制御がなされている。A flow rate detector/7 is installed at the outlet end of the heat exchanger 7 on the municipal water purification pipe/j, and the signal sent from the detector 17 to that flow is input to the control device lza. be done. The opening degree of the recirculation flow rate control valve/6 is controlled by this flow rate control device f#Il.

■、かして、隔離弁／３を全閉とし、循瑣ポンプＶを起
動後、あらかじめ設定したレートで微少開度であった再
循環流量調節弁１４の開度な徐々に増加する。その後再
循環流量が規定に達すると、流量検出器／７からの信号
により、再循環流量調節弁／６の開度な一定とし、復水
の浄化運転を行なう。復水の洗浄終了後は、隔離弁１３
を開らくと熱交換器７を通った復水は、復水溜ｔおよび
第２ホツトウエルタに流入し、再循環流量調節弁／４は
、流１制御装置／ｌからの信号により閉じられる。本実
施例によれば、第２図で示し７た一実施例での効果に加
えて、系統の浄化運転および排水溜ｌや第コホットウェ
ルタへの通水運転を自動的に行なうことかで六る。(2) After fully closing the isolation valve /3 and starting the circulation pump V, the opening of the recirculation flow rate control valve 14, which had been slightly opened, is gradually increased at a preset rate. After that, when the recirculation flow rate reaches a specified value, the opening of the recirculation flow rate control valve /6 is kept constant based on a signal from the flow rate detector /7, and a condensate purification operation is performed. After cleaning the condensate, close the isolation valve 13.
When opened, the condensate that has passed through the heat exchanger 7 flows into the condensate sump t and the second hot welter, and the recirculation flow control valve /4 is closed by a signal from the flow 1 controller /l. According to this embodiment, in addition to the effects of the embodiment shown in FIG. Six.

以上訝明したように本発明によれば、プラント建設当初
や長朝停止後のプラント再起動時等に、系統内の機器、
角ｅ、管の浄化運転を行なう場合、つ水榴および第２ホ
ツトウエルに＃化工十分な１水が混入することを防止し
、ひいては、蒸気発生器への給水の水質を向上させるこ
とがでと、また系統の起動時に復水浄化装置への通水ｆ
Ｍｌｌを、徐々に変化させることを可能にするとともに
、樹脂漏洩等を防止し、今水沖化装置の機能を向上させ
ることができ、さらに系統の浄化運転およびり水溜や第
２ホツトウヱルへの通水運転を自動的に行なうことかで
永る等の効果を奏する。As mentioned above, according to the present invention, equipment in the system can be
When carrying out purification operation of the square e and pipe, it is possible to prevent water from entering the water tank and the second hot well, thereby improving the quality of the water supplied to the steam generator. , and water flow f to the condensate purification device when the system starts up.
In addition to making it possible to gradually change the Mll, it also prevents resin leakage, improves the functionality of the current water tank, and also improves system purification operation and communication to the water reservoir and second hot water tank. Automatic water operation has the effect of increasing longevity.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の伏表的・な彷水装置系緒図、第２図は本
発明の一実施例による復水装置系統図、第３図は本発明
の他の実施例による今水装置系綺図である。 コ・・・復水器、３・・・第１ホツトウエル、ｊ、Ａ・
・・復水浄化装置、ｌ・・・復水溜、ヂ・・・第２ホツ
トウエル、／３・・・隔離弁、ＩＱ・・・再循環弁、１
６・・・再循環流量調節弁、／７・・・ｉｓ検出器、／
ざ・・・流量制御装量。 出願人代理人　　　猪　　股　　　　　清第１図 第２図Fig. 1 is a system diagram of a conventional hidden water circulation system, Fig. 2 is a system diagram of a condensing system according to an embodiment of the present invention, and Fig. 3 is a system diagram of a condensing system according to another embodiment of the present invention. It is a complete diagram of the genealogy. K... Condenser, 3... First hotwell, j, A.
...Condensate purification device, l...Condensate reservoir, Di...Second hot well, /3...Isolation valve, IQ...Recirculation valve, 1
6... Recirculation flow rate control valve, /7... IS detector, /
Well...flow control amount. Applicant's agent Kiyoshi Inomata Figure 1 Figure 2

Claims (1)

【特許請求の範囲】 ／、復水器の底部に画成した第１および第コのホットウ
ェルを有し、第１ホツトウエルに貯水した復水を、一旦
、復水器と別置の復水浮化装置を通し、復水溜に貯水し
た後、第１ホツトウエルに送給するよう忙した復水装置
において、熱交換器から復水溜に到る復水浄化配管上に
隔離弁を配設するとともに、上記復水浄化配管上の、隔
離弁の上流仙′から分岐し１、再循環弁を介して第１ホ
ツトウエルに連結する、再循猥配管を設けたことを特徴
とする復水装置。 コ、再循環配管上に介設した再循環弁は、復水浄化配管
上忙配設された流量検出器の流量信号によって開度制御
が行なわれる再循環°流量調節弁であることを特徴とす
る特許請求の範囲第１項記載の復水装置。[Scope of Claims] / has first and second hot wells defined at the bottom of the condenser, and the condensate stored in the first hot well is temporarily transferred to the condensate separate from the condenser. After storing water in the condensate reservoir through the flotation device, in the busy condensing device, an isolation valve was installed on the condensate purification pipe leading from the heat exchanger to the condensate reservoir. . A condensate device comprising a recirculation pipe branched from an upstream end of the isolation valve on the condensate purification pipe and connected to the first hot well via a recirculation valve. The recirculation valve installed on the recirculation pipe is a recirculation flow rate control valve whose opening degree is controlled by a flow rate signal from a flow rate detector installed on the condensate purification pipe. A condensing device according to claim 1.