JPH0686533A - Mhd generating seed recovery device - Google Patents
Mhd generating seed recovery deviceInfo
- Publication number
- JPH0686533A JPH0686533A JP23484892A JP23484892A JPH0686533A JP H0686533 A JPH0686533 A JP H0686533A JP 23484892 A JP23484892 A JP 23484892A JP 23484892 A JP23484892 A JP 23484892A JP H0686533 A JPH0686533 A JP H0686533A
- Authority
- JP
- Japan
- Prior art keywords
- seed
- working fluid
- cooling medium
- heat exchanger
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、MHD(MAGNET
OHYDRODYNAMICS)発電プラントに設けら
れるシード回収装置の構成に関する。The present invention relates to MHD (MAGNET).
OHYDRODYNAMICS) relates to the configuration of a seed recovery device provided in a power plant.
【0002】[0002]
【従来の技術】閉回路式MHD発電プラントの典型的な
先行技術が図2に示される。図示のMHD発電プラント
は、高温のヘリウムガス、アルゴンガスなど希ガスが作
動流体であり、ガスをプラズマ化して導電性を高めるた
めに、カリウム、セシウムのシード2が発電機1の上流
側において供給される。一方、供給されたシード2は、
MHD発電機1の下流側で、液体金属の形で凝縮され、
回収される。このシード2回収は、シード回収用第1熱
交換器3及びシード回収用第2熱交換器4で行われ、冷
却媒体として通常、常温水が使用される。この場合のシ
ード2は金属であるため、約80℃以下では熱交換器の
伝熱管表面に固化してしまうことから、伝熱管表面温度
の制御を行う必要がある。2. Description of the Related Art A typical prior art of a closed circuit MHD power plant is shown in FIG. In the illustrated MHD power plant, a rare gas such as high-temperature helium gas or argon gas is a working fluid, and seeds 2 of potassium and cesium are supplied on the upstream side of the power generator 1 in order to convert the gas into plasma and enhance conductivity. To be done. On the other hand, the seed 2 supplied is
On the downstream side of the MHD generator 1, condensed in the form of liquid metal,
Be recovered. This seed 2 recovery is performed by the seed recovery first heat exchanger 3 and the seed recovery second heat exchanger 4, and normally room temperature water is used as a cooling medium. Since the seed 2 in this case is a metal, it solidifies on the surface of the heat transfer tube of the heat exchanger at about 80 ° C. or lower, so it is necessary to control the surface temperature of the heat transfer tube.
【0003】[0003]
【発明が解決しようとする課題】前述する熱交換器の伝
熱管表面温度は、伝熱係数の関係から水温に大きく支配
されるものであって、従ってその温度制御が困難であ
り、特に、減量運転、スタートアップ運転の時において
表面温度が下がって、伝熱管表面にシード2が固化して
発電機能が極端に低下するなどの問題が生じる難点を有
している。The surface temperature of the heat transfer tube of the heat exchanger is largely governed by the water temperature due to the relationship of the heat transfer coefficient, and therefore it is difficult to control the temperature, and in particular, the weight reduction There is a problem that the surface temperature is lowered during the operation and the start-up operation, the seed 2 is solidified on the surface of the heat transfer tube, and the power generation function is extremely deteriorated.
【0004】本発明は、このような問題点の解消を図る
ために成されたものであり、本発明の目的は、シード回
収に際し、冷却のための冷却媒体の温度制御を容易かつ
確実に行えて液体金属の固化を生ぜしめず、信頼性に富
み、かつ安定運転性の高いMHD発電の実現を期せしめ
る点にある。The present invention has been made in order to solve such problems, and an object of the present invention is to easily and surely control the temperature of a cooling medium for cooling when recovering seeds. In other words, the solidification of liquid metal does not occur, and it is hoped that MHD power generation with high reliability and high stable operation will be realized.
【0005】[0005]
【課題を解決するための手段】本発明は、上記の目的を
達成するため以下に述べる構成としたものである。即
ち、本発明は、MHD発電機の上流側で作動流体中に混
入されるシードを、該発電機の下流側において液体金属
の状態で凝縮し回収するシード回収装置であって、作動
流体再生及びシード回収のために設けられ、MHD発電
機から導出されたシード含有作動流体と作動流体圧縮機
で圧縮された高圧作動流体との間の熱交換を行わせるシ
ード回収用第1熱交換器と、冷却媒体を閉ループ内に循
環流動可能、かつ、常温水及び/又は高温熱源による冷
却及び/又は加熱可能に形成される冷却媒体循環系と、
作動流体冷却及びシード回収のために設けられ、シード
回収用第1熱交換器を経て前記作動流体圧縮機に導かれ
る低圧作動流体と前記冷却媒体循環系を流動する冷却媒
体との間の熱交換を行わせるシード回収用第2熱交換器
とを含み、前記シード回収用第2熱交換器内を流れる冷
却媒体の温度をシードの固化が生じない温度域に制御し
得ることを特徴とするMHD発電用シード回収装置であ
る。The present invention has the following constitution in order to achieve the above object. That is, the present invention is a seed recovery device for condensing and recovering a seed mixed in a working fluid on the upstream side of an MHD generator in a liquid metal state on the downstream side of the generator. A first heat exchanger for seed recovery, which is provided for seed recovery and performs heat exchange between the seed-containing working fluid derived from the MHD generator and the high-pressure working fluid compressed by the working fluid compressor; A cooling medium circulation system which is capable of circulating and flowing a cooling medium in a closed loop and capable of being cooled and / or heated by normal temperature water and / or a high temperature heat source,
Heat exchange between the low-pressure working fluid, which is provided for cooling the working fluid and recovering the seed and is guided to the working fluid compressor via the first heat exchanger for recovering the seed, and the cooling medium flowing in the cooling medium circulation system. And a second heat exchanger for recovering seeds, the temperature of the cooling medium flowing in the second heat exchanger for recovering seeds can be controlled to a temperature range where solidification of the seeds does not occur. It is a seed recovery device for power generation.
【0006】本発明はまた、冷却媒体循環系を流動する
冷却媒体を加熱するための前記高温熱源が、MHD発電
機の上流側に設けられる高温作動流体加熱器のプレヒー
ティング時に排出される燃焼排ガスであることを特徴と
するMHD発電用シード回収装置である。In the present invention, the high temperature heat source for heating the cooling medium flowing in the cooling medium circulation system is discharged during the preheating of the high temperature working fluid heater provided on the upstream side of the MHD generator. A seed recovery device for MHD power generation, which is an exhaust gas.
【0007】[0007]
【作用】本発明に従えば、シード回収用第2熱交換器に
おいて、シードを含有する作動流体例えば希ガスは、冷
却媒体循環系内を流れる冷却媒体によって冷却される。
その際、冷却媒体は、閉ループを流れていて、しかも常
温水と高温熱源との少なくとも何れか一方と熱交換が行
われるため、それらの各流量をコントロールすることに
よって、シードが固化を生じないように例えば約70〜
80℃の一定温度に保持する制御が簡単、確実に行え
る。スタートアップ時には、高温熱源のみまたは高温熱
源主体で冷却媒体を加熱し、通常の運転時には、常温水
のみまたは常温水主体で冷却することによって、大きな
温度変化に対しても一定温度を確保した冷却媒体の循環
供給が安定的に実行される。その際、温水発生用の高温
熱源として、高温作動流体加熱器のプレヒーティング時
に排出される燃焼排ガスを利用することによって省エネ
ルギーが図れる。According to the present invention, in the second heat exchanger for recovering seeds, the working fluid containing the seed, for example, the rare gas, is cooled by the cooling medium flowing in the cooling medium circulation system.
At that time, since the cooling medium flows in a closed loop and heat is exchanged with at least one of room temperature water and a high temperature heat source, the seeds do not solidify by controlling the respective flow rates thereof. For example, about 70 ~
Control to maintain a constant temperature of 80 ° C can be performed easily and reliably. At startup, the cooling medium is heated only by the high-temperature heat source or mainly by the high-temperature heat source, and during normal operation, it is cooled by only normal-temperature water or mainly by the normal-temperature water, so that a constant temperature is maintained even for large temperature changes. Circulating supply is executed stably. At this time, energy can be saved by using the combustion exhaust gas discharged during preheating of the high temperature working fluid heater as a high temperature heat source for generating hot water.
【0008】[0008]
【実施例】以下、本発明の実施例について添付図面を参
照しながら説明する。図1は、本発明の実施例に係る閉
回路式MHD発電機プラントの装置回路図である。MH
D発電機1、例えばディスク型発電機に対して、電気出
力系統8、希ガス系統9、シード系統2、燃料系統1
0、空気・燃焼ガス系統11及び冷却媒体循環系5が備
えられる。.電気出力系統8は、前記発電機1が出力す
る直流を交流に変換するインバータ12と、後述の空気
圧縮機17によって駆動される交流発電機16を有す
る。希ガス(作動流体)系統9とシード系統2とは、共
通する経路を有していて、ディスク型発電機1の発電部
と、シード回収用第1熱交換器3と、シード回収用第2
熱交換器4と、希ガス圧縮機13の圧縮部と、希ガスタ
ービン14と、高温希ガス加熱器15とを管路によって
接続することにより、閉回路を形成している。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a device circuit diagram of a closed circuit MHD generator plant according to an embodiment of the present invention. MH
D generator 1, for example, disk type generator, electric output system 8, rare gas system 9, seed system 2, fuel system 1
0, an air / combustion gas system 11 and a cooling medium circulation system 5 are provided. . The electric output system 8 includes an inverter 12 that converts direct current output from the generator 1 into alternating current, and an alternating current generator 16 that is driven by an air compressor 17 described later. The rare gas (working fluid) system 9 and the seed system 2 have a common path, and the power generation section of the disk-type generator 1, the first heat exchanger 3 for seed recovery, and the second heat recovery system for seed recovery.
A closed circuit is formed by connecting the heat exchanger 4, the compression part of the rare gas compressor 13, the rare gas turbine 14, and the high temperature rare gas heater 15 by a pipe line.
【0009】これら希ガス系統9及びシード系統2にお
いて、シード(カリウム)が混入された希ガス(アルゴ
ンガス,2100K,6.00atm)は、前記発電部
に噴出されて発電の用に供した後、減圧下で通過し15
00K,0.40atmのガス状態になり、次いで図示
しない一次冷却器で冷却されて(1000K,0.38
atm)シード回収用第1熱交換器3に至り、ここでさ
らに希ガス再生及びシード回収のための冷却が行われ
て、シードの殆どはディスク型発電機1の発電部の上流
側に戻されて前記希ガスに混入され、一方、冷却された
低圧の希ガス(528K,0.34atm)は、シード
回収用第2熱交換器4に送られて冷却媒体循環系5内を
流れる冷却媒体(80℃の温水)により冷却される(3
30K,0.32atm)。ここで残りのシードは、発
電部の上流側に戻されて前記希ガスに混入され、一方、
希ガスは、希ガス圧縮機13に至って圧縮されて、高圧
の希ガス(400K,3.00atm)となり、次い
で、シード回収用第1熱交換器3で加熱された後、希ガ
スタービン14を駆動して、850K,6.50atm
の希ガスで高温希ガス加熱器15に送られ加熱されて2
100K,6.00atmの希ガスとなって前記発電部
に噴出される。In the rare gas system 9 and the seed system 2, the rare gas (argon gas, 2100K, 6.00 atm) mixed with the seed (potassium) is ejected to the power generation unit and used for power generation. , Passing under reduced pressure 15
It becomes a gas state of 00K, 0.40 atm, and is then cooled by a primary cooler (not shown) (1000K, 0.38
atm) The first heat exchanger 3 for seed recovery is reached, where cooling for rare gas regeneration and seed recovery is further performed, and most of the seeds are returned to the upstream side of the power generation section of the disk-type power generator 1. The mixed low-pressure rare gas (528K, 0.34 atm) is sent to the second heat exchanger 4 for seed recovery and the cooling medium flowing in the cooling medium circulation system 5 ( Cooled by warm water at 80 ℃ (3
30K, 0.32 atm). Here, the remaining seeds are returned to the upstream side of the power generation section and mixed with the rare gas, while
The rare gas reaches the rare gas compressor 13 and is compressed into a high pressure rare gas (400 K, 3.00 atm), which is then heated in the first heat exchanger 3 for seed recovery, and then passed through the rare gas turbine 14. Drive, 850K, 6.50atm
Is sent to the high temperature noble gas heater 15 and heated by the noble gas of 2
It becomes a rare gas of 100 K and 6.00 atm and is ejected to the power generation section.
【0010】一方、燃料系統10では、燃焼器19に送
られた燃料が、燃焼用空気との混合下で燃焼し、燃焼ガ
スとなって前記高温希ガス加熱器15に送られて高温希
ガス加熱器15を加熱後、2次燃焼器20に至る。ここ
で2次燃焼ガスにより燃焼された後、燃焼ガスタービン
18を駆動して排ガスとして煙突から排出される。この
燃焼ガスタービン18の出力によって空気圧縮機17及
び発電機16が駆動され、空気・燃焼ガス系統11で
は、燃焼用空気が空気圧縮機17で圧縮された後、前記
燃焼器19に供給される。On the other hand, in the fuel system 10, the fuel sent to the combustor 19 burns under the mixing with the combustion air and becomes combustion gas, which is sent to the high temperature rare gas heater 15 to send the high temperature rare gas. After heating the heater 15, the secondary combustor 20 is reached. After being burned by the secondary combustion gas, the combustion gas turbine 18 is driven to be discharged as exhaust gas from the stack. The output of the combustion gas turbine 18 drives the air compressor 17 and the generator 16, and in the air / combustion gas system 11, the combustion air is compressed by the air compressor 17 and then supplied to the combustor 19. .
【0011】前記シード回収用第2熱交換器4に関連さ
せて設けられる冷却媒体循環系5は、シード回収用第2
熱交換器4における冷却側通路を含む密閉された循環回
路を備えるとともに、この循環回路に対して、冷却用熱
交換器6及び加熱用熱交換器7が付設される。冷却用熱
交換器6は、水対水形の熱交換器によって形成され、常
温水が冷却側管路に流量調節可能に供給される。一方、
加熱用熱交換器7は、気対水形の熱交換器によって形成
され、高温ガス、例えば高温希ガス加熱器15によるプ
レヒーティングの際に排出される燃焼排ガスが加熱側管
路に流量調節可能に供給される。A cooling medium circulation system 5 provided in association with the second heat exchanger 4 for seed recovery is a second heat recovery system for seed recovery.
The heat exchanger 4 includes a closed circulation circuit including a cooling side passage, and a cooling heat exchanger 6 and a heating heat exchanger 7 are attached to the circulation circuit. The heat exchanger 6 for cooling is formed by a water-to-water heat exchanger, and normal temperature water is supplied to the cooling side pipe line so that the flow rate can be adjusted. on the other hand,
The heating heat exchanger 7 is formed by an air-to-water heat exchanger, and the flow rate of high temperature gas, for example, combustion exhaust gas discharged during preheating by the high temperature rare gas heater 15, is adjusted to the heating side pipe line. Supplied as possible.
【0012】MHD発電プラントの発電運転中における
冷却媒体循環系5の運転態様は下記のとおりである。ス
タートアップ前の高温希ガス加熱器15の予備加熱時
に、加熱用熱交換器7に燃焼排ガスを流通して、その流
量を調節しながら冷却媒体の常温水を加熱し温水を準備
する。The operation mode of the cooling medium circulation system 5 during the power generation operation of the MHD power plant is as follows. During preheating of the high-temperature rare gas heater 15 before startup, the combustion exhaust gas is circulated to the heating heat exchanger 7, and the normal temperature water of the cooling medium is heated to prepare hot water while adjusting the flow rate.
【0013】一方、定常運転時には、加熱用熱交換器7
の運転を停止し(燃焼排ガスの流通の停止)た状態で、
冷却用熱交換器6に冷却媒体の常温水を流通して、その
流量を調節しながらシード回収用第2熱交換器4で加熱
された温水を冷却することにより、シード回収用第2熱
交換器4における冷却側通路の表面温度が例えば80℃
一定となるようにコントロールする。このようにして、
運転立ち上げ前、冷却媒体を加熱用熱交換器7で加熱す
れば、後は面倒な切り替えなしに連続運転ができる。On the other hand, during steady operation, the heating heat exchanger 7
With the operation of (stopped distribution of combustion exhaust gas) stopped,
Second heat exchange for seed recovery by circulating normal temperature water as a cooling medium through the heat exchanger 6 for cooling and cooling the hot water heated by the second heat exchanger 4 for seed recovery while adjusting the flow rate thereof. The surface temperature of the cooling side passage in the container 4 is, for example, 80 ° C.
Control to be constant. In this way
If the cooling medium is heated by the heating heat exchanger 7 before the startup of the operation, the continuous operation can be performed thereafter without troublesome switching.
【0014】[0014]
【発明の効果】以上述べたように本発明によれば、冷却
媒体循環系における常温水により温水を冷却制御し、希
ガスを常にシードが固化しない一定温度に冷却すること
が可能であって、運転効率が高く、かつ安定したMHD
発電を確実に維持し得る。更に、MHD発電プラントに
おける燃焼排ガスの熱を冷却媒体の加熱に利用すること
により、省エネルギーが図れる。As described above, according to the present invention, it is possible to control the cooling of hot water by the normal temperature water in the cooling medium circulation system and cool the rare gas to a constant temperature at which the seeds do not solidify at all times. High operating efficiency and stable MHD
Power generation can be reliably maintained. Furthermore, energy can be saved by utilizing the heat of the combustion exhaust gas in the MHD power plant for heating the cooling medium.
【図1】本発明の実施例に係る閉回路式MHD発電機プ
ラントの装置回路図である。FIG. 1 is a device circuit diagram of a closed circuit MHD generator plant according to an embodiment of the present invention.
【図2】従来の閉回路式MHD発電機プラントの装置回
路図である。FIG. 2 is a device circuit diagram of a conventional closed circuit MHD generator plant.
1…MHD発電機 2…シード系統、 3…シード回収第1熱交換器、 4…シード回収第2熱交換器、 5…冷却媒体循環系、 6…冷却用熱交換器、 7…加熱用熱交換器、 8…電気出力系統、 9…希ガス系統、 10…燃料系統、 11…空気・燃焼ガス系統、 DESCRIPTION OF SYMBOLS 1 ... MHD generator 2 ... Seed system, 3 ... Seed collection 1st heat exchanger, 4 ... Seed collection 2nd heat exchanger, 5 ... Cooling medium circulation system, 6 ... Cooling heat exchanger, 7 ... Heating heat Exchanger, 8 ... Electric output system, 9 ... Noble gas system, 10 ... Fuel system, 11 ... Air / combustion gas system,
Claims (2)
入されるシードを、該発電機の下流側において液体金属
の状態で凝縮し回収するシード回収装置であって、作動
流体再生及びシード回収のために設けられ、MHD発電
機から導出されたシード含有作動流体と作動流体圧縮機
で圧縮された高圧作動流体との間の熱交換を行わせるシ
ード回収用第1熱交換器と、冷却媒体を閉ループ内に循
環流動可能、かつ、常温水及び/又は高温熱源による冷
却及び/又は加熱可能に形成される冷却媒体循環系と、
作動流体冷却及びシード回収のために設けられ、シード
回収用第1熱交換器を経て前記作動流体圧縮機に導かれ
る低圧作動流体と前記冷却媒体循環系を流動する冷却媒
体との間の熱交換を行わせるシード回収用第2熱交換器
とを含み、前記シード回収用第2熱交換器内を流れる冷
却媒体の温度をシードの固化が生じない温度域に制御し
得ることを特徴とするMHD発電用シード回収装置。1. A seed recovery device for condensing and recovering a seed mixed in a working fluid on the upstream side of an MHD generator in a liquid metal state on the downstream side of the generator, wherein the working fluid is regenerated and seeded. A first heat exchanger for seed recovery, which is provided for recovery and performs heat exchange between the seed-containing working fluid derived from the MHD generator and the high-pressure working fluid compressed by the working fluid compressor, and cooling A cooling medium circulation system in which a medium can be circulated in a closed loop and cooled and / or heated by normal temperature water and / or a high temperature heat source;
Heat exchange between the low-pressure working fluid, which is provided for cooling the working fluid and recovering the seed and is guided to the working fluid compressor via the first heat exchanger for recovering the seed, and the cooling medium flowing in the cooling medium circulation system. And a second heat exchanger for recovering seeds, the temperature of the cooling medium flowing in the second heat exchanger for recovering seeds can be controlled to a temperature range where solidification of the seeds does not occur. Seed recovery device for power generation.
熱するための前記高温熱源が、MHD発電機の上流側に
設けられる高温作動流体加熱器のプレヒーティング時に
排出される燃焼排ガスである請求項1記載のMHD発電
用シード回収装置。2. The high temperature heat source for heating a cooling medium flowing through a cooling medium circulation system is combustion exhaust gas discharged during preheating of a high temperature working fluid heater provided upstream of an MHD generator. The seed recovery device for MHD power generation according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23484892A JPH0686533A (en) | 1992-09-02 | 1992-09-02 | Mhd generating seed recovery device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23484892A JPH0686533A (en) | 1992-09-02 | 1992-09-02 | Mhd generating seed recovery device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0686533A true JPH0686533A (en) | 1994-03-25 |
Family
ID=16977311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23484892A Pending JPH0686533A (en) | 1992-09-02 | 1992-09-02 | Mhd generating seed recovery device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0686533A (en) |
-
1992
- 1992-09-02 JP JP23484892A patent/JPH0686533A/en active Pending
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