JPS5949402B2 - Liquefied gas revaporization plant - Google Patents
Liquefied gas revaporization plantInfo
- Publication number
- JPS5949402B2 JPS5949402B2 JP54120785A JP12078579A JPS5949402B2 JP S5949402 B2 JPS5949402 B2 JP S5949402B2 JP 54120785 A JP54120785 A JP 54120785A JP 12078579 A JP12078579 A JP 12078579A JP S5949402 B2 JPS5949402 B2 JP S5949402B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- water
- liquefied gas
- plant
- condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は復水式蒸気タービンとたとえば液化天然ガス（
以下ＬＮＧと記す）などの液化ガスの再ガス化プラント
を組合せ、タービンプラントの温排水による環境への悪
影響を解消あるいは減少すると共に、再ガス化の気化装
置を小型化する液化ガス再気化プラントに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a condensing steam turbine and a liquefied natural gas (liquefied natural gas), for example.
A liquefied gas regasification plant that combines a liquefied gas regasification plant such as LNG (hereinafter referred to as LNG), eliminates or reduces the negative impact on the environment caused by heated wastewater from a turbine plant, and downsizes the regasification vaporization equipment. .
ＬＮＧなどの低温度液化ガスはたとえば一１４０℃〜−
１６０℃の温度で貯蔵されており、再ガス化して使用す
る場合には通常オープンラック式気化装置などで、従来
海水あるいは河川水（以下自然水と記す）で加熱してい
る。Low-temperature liquefied gas such as LNG is for example -140℃~-
It is stored at a temperature of 160°C, and when used after being regasified, it is usually heated with seawater or river water (hereinafter referred to as natural water) using an open rack vaporizer.
気化装置からの排水は、液化ガスの気化熱等の冷熱によ
り低温となるが、従来この排水はそのまま海あるいは河
川に放出しており、環境へ冷熱影響を与えていた。The waste water from the vaporizer has a low temperature due to cold energy such as the heat of vaporization of the liquefied gas, but conventionally, this waste water has been discharged directly into the sea or rivers, which has had a cold effect on the environment.
一方、復水式蒸気タービンプラントにおいてはタービン
の排気蒸気を復水器を用い自然水により冷却し、蒸気を
液化している。On the other hand, in a condensing steam turbine plant, exhaust steam from a turbine is cooled with natural water using a condenser, and the steam is liquefied.
この場合冷却用水は復水器で加熱され、高温となって復
水器から排出されるが、従来はこの排水をそのまま海あ
るいは河川に放出しており、環境へ熱影響を与えていた
。In this case, the cooling water is heated in a condenser and discharged from the condenser at a high temperature. Conventionally, this waste water was discharged directly into the sea or river, which had a thermal impact on the environment.
また、前記気化装置は装置が大きく小型化が要望されて
いた。Furthermore, the vaporizer is large and needs to be downsized.
また、復水式蒸気タービンプラントと液化ガス再気化プ
ラントとを組み合せたものも例えば、特公昭４７−２０
６７３号公報に見られる如く公知である。In addition, a combination of a condensing steam turbine plant and a liquefied gas revaporization plant is also available, for example,
This is known as seen in Japanese Patent No. 673.
前記公報には、蒸気タービンプラントの復水器用の冷却
水を液化天然ガスの冷熱で低温にし、これによって復水
器内の蒸気圧力な下げて、蒸気タービンの効率を向上さ
せることをねらいとしたプラントが開示されている。The above publication states that the aim is to reduce the cooling water for the condenser of a steam turbine plant to a low temperature using the cold heat of liquefied natural gas, thereby lowering the steam pressure in the condenser and improving the efficiency of the steam turbine. The plant is disclosed.
この公知のプラントでは、復水器に導入される冷却水が
、予め液化ガスにより冷されるので、復水器の排水温度
は低くなるが、液化ガスの気化効率は必ずしも良くなら
ないという問題がある。In this known plant, since the cooling water introduced into the condenser is cooled in advance by liquefied gas, the temperature of the discharge water from the condenser is lowered, but there is a problem in that the vaporization efficiency of the liquefied gas is not necessarily improved. .
すなわち、液化ガスの気化効率が問題になるのは、海水
温度の低い冬期であるが、液化ガスを気化させるための
気化器には、低い温度の海水がそのまま導かれることに
なり、気化器の伝熱面積を十分太きくしなげれば、所期
の性能が維持できな（ゝＯ
〔発明の目的〕
本発明の目的は、タービン復水器の高温排水を液化ガス
の再ガス化プラントの気化装置の加熱用水として導入す
ることにより、前記のタービン復水器の高温排水の環境
への影響を解消するとともに、高温加熱用水を利用する
ことにより気化器を小型化する液化ガス再気化プラント
を提供するものである。In other words, the vaporization efficiency of liquefied gas becomes a problem in winter when the seawater temperature is low, but low-temperature seawater is directly led to the vaporizer for vaporizing the liquefied gas, and the vaporization efficiency of the vaporizer is reduced. If the heat transfer area is not made sufficiently large, the desired performance cannot be maintained. Provides a liquefied gas revaporization plant that eliminates the environmental impact of high-temperature wastewater from the turbine condenser by introducing it as heating water in the equipment, and downsizes the vaporizer by using high-temperature heating water. It is something to do.
本発明は復水式蒸気タービンの復水器に冷却水として使
用された高温排水を、低温度状態に液化されたガスの再
ガス化を行う気化装置の加熱用水として使用するように
構成し、前記気化装置にて液化ガスと熱交換され、低温
化された該加熱用水を、前記復水器からの高温排水と合
流させて排水するようにしたことを特徴とするものであ
る。The present invention is configured to use high-temperature waste water used as cooling water in the condenser of a condensing steam turbine as heating water for a vaporizer that regasifies gas liquefied to a low-temperature state, The heating water, which has been lowered in temperature by heat exchange with the liquefied gas in the vaporizer, is combined with high-temperature waste water from the condenser and discharged.
以下本発明の一実施例を図面に従って詳細に説明する。 An embodiment of the present invention will be described in detail below with reference to the drawings.
第１図は本発明による蒸気タービンプラントと低温度液
化ガス再ガス化プラントの組合せプラントを示す系統図
である。FIG. 1 is a system diagram showing a combined plant of a steam turbine plant and a low-temperature liquefied gas regasification plant according to the present invention.
蒸気タービン１１の排気蒸気１２は復水器１３において
海水あるいは河川水の冷却水５によって冷却され凝縮し
復水１４となる。Exhaust steam 12 from the steam turbine 11 is cooled and condensed into condensate water 14 in a condenser 13 by cooling water 5 such as seawater or river water.
冷却水５は復水器１３において排気蒸気１２と熱交換し
て加熱され、復水器排水６として排出される。The cooling water 5 is heated in the condenser 13 by exchanging heat with the exhaust steam 12, and is discharged as condenser waste water 6.
排水６の温度は復水器入口冷却水温度５に比べたとえば
５〜１０℃高温となる。The temperature of the waste water 6 is, for example, 5 to 10° C. higher than the condenser inlet cooling water temperature 5.
この温排水６の一部の排水７を液化ガスの再ガス化装置
の加熱用水として気化器３に導く。A part of the heated waste water 6 is introduced into the vaporizer 3 as heating water for the liquefied gas regasifier.
液化ガスタンク１からの液化ガス２は、気化器３に導入
され、ここで加熱用排水７によって加熱され気化し気化
ガス４となり、たとえば都市ガス用などの目的に供給さ
れる。Liquefied gas 2 from liquefied gas tank 1 is introduced into vaporizer 3, where it is heated by heating wastewater 7 and vaporized to form vaporized gas 4, which is supplied for purposes such as city gas.
加熱用排水７は液化ガス２どの熱交換によって冷却され
。The heating waste water 7 is cooled by heat exchange with the liquefied gas 2.
低温排水８となる。It becomes low temperature waste water 8.
低温排水８の温度は加熱用排水７に比べ、たとえば３〜
１０℃低温となる。The temperature of the low-temperature wastewater 8 is, for example, 3 to 30% lower than that of the heating wastewater 7.
It becomes 10℃ lower.
従って低温排水８の温度は自然水５の温度とほぼ等しく
なる。Therefore, the temperature of the low-temperature waste water 8 becomes approximately equal to the temperature of the natural water 5.
加熱用排水７は復水器１３での熱交換によって自然水よ
りたとえば５〜１０℃高温となることから加熱用水とし
て自然水を利用した場合に比べて気化器３における伝熱
が良好となり、従って気化器３を小型化できる。The heating wastewater 7 becomes, for example, 5 to 10 degrees Celsius higher than natural water due to heat exchange in the condenser 13, so heat transfer in the vaporizer 3 is better than when natural water is used as heating water. The vaporizer 3 can be downsized.
気化器を同一寸法とする場合は気化するガス量が多くな
る。If the vaporizers have the same dimensions, the amount of gas to be vaporized will increase.
復水器排水６の全量を加熱用排水７としてもよいが、運
転の円滑を計るため全量でなく、その一部を加熱用排水
７として使用した場合、その残部が温排水９である。The entire amount of the condenser waste water 6 may be used as the heating waste water 7, but in order to ensure smooth operation, if a part of it is used as the heating waste water 7 instead of the whole amount, the remainder is the heated waste water 9.
そこで低温の排水８と残部の温排水９を合流させ混合排
水１０とした後、海あるいは河川にこれを放出するのが
、排出水温が一様となり好ましい。Therefore, it is preferable to combine the low-temperature wastewater 8 and the remaining warm wastewater 9 to form a mixed wastewater 10, and then discharge this into the sea or river, since the temperature of the discharged water will be uniform.
特に、冷却水５の温度が季節的な要因で変動することを
考えると、季節によって、加熱用排水７と、温排水９ど
の分流比を変えることにより、混合排水１０の温度を自
然水の温度と同程度に保ちながら気化器３の気化性能を
最大限に発揮させることができる。In particular, considering that the temperature of the cooling water 5 fluctuates due to seasonal factors, the temperature of the mixed wastewater 10 can be adjusted to the natural water temperature by changing the split ratio of the heating wastewater 7 and the heated wastewater 9 depending on the season. It is possible to maximize the vaporization performance of the vaporizer 3 while maintaining the same level.
％に、冷却水５の温度が低い冬期においては、復水器排
水の全量を気化器に導くことにより、十分な量の液化ガ
スを気化させることが可能である。%, in winter when the temperature of the cooling water 5 is low, it is possible to vaporize a sufficient amount of liquefied gas by guiding the entire amount of condenser drainage to the vaporizer.
以上詳細に述べたように、本発明は、蒸気タービンプラ
ントの復水器からの温排水を、低温度の液化ガスを再ガ
ス化させるための加熱用水として利用することによって
、蒸気タービン復水器からの温排水による環境への熱影
響を低減すると共に、再ガス化プラントの気化器を小型
にすることができるという効果がある。As described in detail above, the present invention utilizes heated waste water from a steam turbine condenser as heating water for regasifying low-temperature liquefied gas. This has the effect of reducing the thermal effect on the environment due to heated wastewater from the plant, and making it possible to downsize the vaporizer of the regasification plant.
本発明の付加的な効果としては、自然水温度が低い地域
あるいは特に冬期に自然水温度が低くなる場合において
も、復水器の温排水によって気化器の円滑な運転が可能
となる。An additional effect of the present invention is that even in areas where the natural water temperature is low or when the natural water temperature is low, especially in winter, the vaporizer can operate smoothly due to the warm water discharged from the condenser.
また、気化器寸法を一定とする場合は気化器で発生する
ガス量が多くなる。Furthermore, when the dimensions of the vaporizer are constant, the amount of gas generated in the vaporizer increases.
また、蒸気タービン復水器の排水熱量を再ガス化プラン
トの冷熱容量よりも多くすることによって、再ガス化プ
ラントからの冷熱による環境への悪影響を軽減すること
ができる。In addition, by making the amount of heat discharged from the steam turbine condenser larger than the cooling capacity of the regasification plant, it is possible to reduce the negative impact on the environment due to the cooling heat from the regasification plant.
第１図は本発明の一実施例を示す蒸気タービンプラント
と液化ガス再気化プラントの組合せプラントの系統図で
ある。
１・・・液化ガスタンク、２・・・液化ガス、３・・・
気化器、４・・・気化ガス、５・・・冷却水、６・・・
温排水、７・・・加熱用排水、８・・・低温排水、９・
・・温排水、１０・・・混合排水、１１・・・蒸気ター
ビン、１２・・・タービン排気、１３・・・復水器、１
４・・・復水、１５・・・タービン入口蒸気。FIG. 1 is a system diagram of a combined plant of a steam turbine plant and a liquefied gas revaporization plant showing one embodiment of the present invention. 1... Liquefied gas tank, 2... Liquefied gas, 3...
vaporizer, 4... vaporized gas, 5... cooling water, 6...
Warm wastewater, 7... Heating wastewater, 8... Low temperature wastewater, 9.
... Warm water discharge, 10 ... Mixed waste water, 11 ... Steam turbine, 12 ... Turbine exhaust, 13 ... Condenser, 1
4... Condensate, 15... Turbine inlet steam.
Claims (1)
れた高温排水を、低温度状態に液化されたガスの再ガス
化を行う気化装置の加熱用水として使用するように構成
し、前記気化装置にて液化ガスと熱交換され、低温化さ
れた加熱用水を、前記復水器からの高温排水と合流させ
て排水するようにしたことを特徴とする液化ガス再気化
プラント。1. High-temperature wastewater used as cooling water in the condenser of a condensing steam turbine is configured to be used as heating water for a vaporizer that regasifies gas liquefied to a low temperature state, and 1. A liquefied gas revaporization plant, characterized in that heating water that has undergone heat exchange with liquefied gas in a device and has been lowered in temperature is combined with high-temperature waste water from the condenser and discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54120785A JPS5949402B2 (en) | 1979-09-21 | 1979-09-21 | Liquefied gas revaporization plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54120785A JPS5949402B2 (en) | 1979-09-21 | 1979-09-21 | Liquefied gas revaporization plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5551903A JPS5551903A (en) | 1980-04-16 |
| JPS5949402B2 true JPS5949402B2 (en) | 1984-12-03 |
Family
ID=14794930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54120785A Expired JPS5949402B2 (en) | 1979-09-21 | 1979-09-21 | Liquefied gas revaporization plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5949402B2 (en) |
-
1979
- 1979-09-21 JP JP54120785A patent/JPS5949402B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5551903A (en) | 1980-04-16 |
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