JPH09221098A - Reliquifing device for low temperature lpg ship - Google Patents
Reliquifing device for low temperature lpg shipInfo
- Publication number
- JPH09221098A JPH09221098A JP2767696A JP2767696A JPH09221098A JP H09221098 A JPH09221098 A JP H09221098A JP 2767696 A JP2767696 A JP 2767696A JP 2767696 A JP2767696 A JP 2767696A JP H09221098 A JPH09221098 A JP H09221098A
- Authority
- JP
- Japan
- Prior art keywords
- condenser
- seawater
- circulation system
- heat exchanger
- air
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、低温式ＬＰＧ船に
設置される再液化装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reliquefaction device installed in a low temperature type LPG ship.
【０００２】[0002]
【従来の技術】図３に示すように、低温式ＬＰＧ船１は
貨物タンク２に−４８℃のプロピレン、−４５℃のプロ
パン、−３３℃のアンモニア等の貨物液３を積載する
が、通常、周囲の外気や海水温度は前記貨物液３の温度
よりも高いので、外部からの侵入熱によって貨物タンク
２内の貨物液３が蒸発する。この蒸発ガス３ａは、上甲
板１ａ上に設置した再液化装置４に導かれて再度液化さ
れ、再び貨物タンク２に戻される。2. Description of the Related Art As shown in FIG. 3, a low temperature type LPG carrier 1 loads cargo liquid 3 such as propylene at −48 ° C., propane at −45 ° C. and ammonia at −33 ° C. in a cargo tank 2. Since the temperature of ambient air and seawater is higher than the temperature of the cargo liquid 3, the cargo liquid 3 in the cargo tank 2 evaporates due to the heat entering from the outside. The vaporized gas 3a is guided to the reliquefaction device 4 installed on the upper deck 1a, liquefied again, and returned to the cargo tank 2 again.
【０００３】ところで、前記再液化装置４は、海水５を
冷媒として使用する構成で、貨物タンク２から導いてき
た蒸発ガス３ａを圧縮機４ａで加圧し、加圧されて高温
になったガスを凝縮器４ｂに導き、この凝縮器４ｂ内で
海水ポンプ６によって吸い込まれた海水５で冷却して凝
縮・液化し、その凝縮液を膨張弁４ｃで断熱膨張させて
一部ガスが混合した低温の液体に戻すものである。By the way, the reliquefaction apparatus 4 has a structure in which seawater 5 is used as a refrigerant, and the vaporized gas 3a introduced from the cargo tank 2 is pressurized by the compressor 4a, and the gas heated to a high temperature is pressurized. It is guided to the condenser 4b, and is cooled by the seawater 5 sucked by the seawater pump 6 in the condenser 4b to be condensed and liquefied. The condensed liquid is adiabatically expanded by the expansion valve 4c so that a part of the gas is mixed at a low temperature. It returns to liquid.
【０００４】[0004]
【発明が解決しようとする課題】上記した構成の再液化
装置にあっては、低温式ＬＰＧ船が、例えば外気−２０
℃の寒冷地を航行する場合、周囲の外気温度は貨物液の
温度より高いので、貨物液は蒸発するものの、冷媒であ
る海水の氷点は約−２℃であるので、上甲板上の海水配
管を通して再液化装置に導く過程で、海水が低温の外気
のために凍結する場合がある。また、貨物の揚げ荷後に
は再液化装置を停止するが、この時、前記海水配管中に
残った海水を完全に排水しないと、海水配管中の静止海
水が凍結し、寒冷地で次の貨物液を荷役したときに、再
液化装置を運転できなくなる。In the reliquefaction apparatus having the above-mentioned structure, the low temperature type LPG ship is, for example, the outside air-20.
When navigating in a cold region of ℃, the ambient air temperature is higher than the temperature of the cargo liquid, so the cargo liquid evaporates, but the freezing point of seawater, which is a refrigerant, is about -2 ° C, so the seawater piping on the upper deck In the process of leading to the reliquefaction unit through the seawater, seawater may freeze due to low temperature outside air. Although the reliquefaction unit is stopped after the cargo is unloaded, if the seawater remaining in the seawater piping is not completely drained at this time, the stationary seawater in the seawater piping will freeze and the next cargo will be transported in cold regions. When the liquid is loaded, the reliquefaction device cannot be operated.
【０００５】本発明は、上記した従来の問題点に鑑みて
なされたものであり、低温式ＬＰＧ船が寒冷地を航行す
る場合にあった不都合を解決できる再液化装置を提供す
ることを目的としている。The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a reliquefaction apparatus capable of solving the inconvenience encountered when a low temperature type LPG ship navigates in a cold region. There is.
【０００６】[0006]
【課題を解決するための手段】上記した目的を達成する
ために、本発明の低温式ＬＰＧ船の再液化装置は、海水
系統の途中に遮断弁を介設し、これら遮断弁と凝縮器の
間に、空冷式熱交換器を介設した不凍液の循環系統を設
置したり、また、不凍液の循環系統に代えて、圧縮機と
凝縮器の間に蒸発ガスの循環系統を設けるとともに、こ
の循環系統の途中に空冷式の熱交換器を介設している。
そして、寒冷地では、海水系統に代えて、不凍液の循環
系統や蒸発ガスの循環系統の途中に介設した空冷式の熱
交換器を使用することにより、海水の凍結による装置の
故障を防止することができる。In order to achieve the above-mentioned object, the reliquefaction apparatus for a low temperature type LPG ship of the present invention has a shutoff valve in the middle of a seawater system, and these shutoff valve and condenser are connected. An antifreeze liquid circulation system with an air-cooled heat exchanger is installed between them, or an evaporative gas circulation system is installed between the compressor and the condenser in place of the antifreeze liquid circulation system. An air-cooled heat exchanger is installed in the middle of the system.
In cold regions, the use of air-cooled heat exchangers in the middle of the antifreeze circulation system and evaporative gas circulation system instead of the seawater system prevents equipment failure due to seawater freezing. be able to.
【０００７】[0007]
【発明の実施の形態】本発明の第１の低温式ＬＰＧ船の
再液化装置は、貨物タンク内に荷役した貨物液の蒸発ガ
スを導いてこれを凝縮・液化する凝縮器へ海水を導くと
共に、蒸発ガスを冷却した後の海水を凝縮器から船外に
排出する海水系統の途中に遮断弁を介設し、これら遮断
弁と凝縮器の間に、空冷式熱交換器を介設した不凍液の
循環系統を設置したものである。BEST MODE FOR CARRYING OUT THE INVENTION A first low temperature type LPG ship reliquefaction apparatus of the present invention guides seawater to a condenser for guiding and condensing and liquefying the vaporized gas of cargo cargo that has been loaded into a cargo tank. , An antifreeze liquid with a shutoff valve installed in the middle of the seawater system that discharges the seawater after cooling the evaporative gas from the condenser to the outside of the ship, and an air-cooled heat exchanger between the shutoff valve and the condenser. The circulation system is installed.
【０００８】そして、前記した第１の低温式ＬＰＧ船の
再液化装置における、不凍液の循環系統に、不凍液を満
たした膨張タンクをバイパス管を介して設置すれば、海
水系統の途中に介設した遮断弁より凝縮器側に残った海
水を、適正な濃度に調整して不凍液として使用できる。If an expansion tank filled with antifreeze liquid is installed via a bypass pipe in the antifreeze liquid circulation system in the above-mentioned first low temperature type LPG ship reliquefaction apparatus, it is provided in the middle of the seawater system. Seawater remaining on the condenser side of the shutoff valve can be adjusted to an appropriate concentration and used as antifreeze.
【０００９】また、本発明の第２の低温式ＬＰＧ船の再
液化装置は、前記第１の低温式ＬＰＧ船の再液化装置に
おける不凍液の循環系統に代えて、圧縮機と凝縮器の間
に蒸発ガスの循環系統を設けるとともに、この循環系統
の途中に空冷式の熱交換器を介設したものである。The second re-liquefaction apparatus for a low temperature LPG ship according to the present invention is provided between the compressor and the condenser instead of the antifreeze circulation system in the reliquefaction apparatus for the first low temperature LPG ship. An evaporative gas circulation system is provided, and an air-cooled heat exchanger is provided in the middle of this circulation system.
【００１０】上記した本発明の低温式ＬＰＧ船の再液化
装置は、寒冷地では海水に代えて不凍液を凝縮器に導い
て貨物液の蒸発ガスを凝縮・液化したり、また、前記蒸
発ガスを空冷式の熱交換器に導いて冷却・液化するの
で、海水の凍結に起因する装置の故障が防止できる。The reliquefaction apparatus for a low temperature type LPG ship according to the present invention described above, in cold regions, introduces an antifreeze liquid into a condenser instead of seawater to condense and liquefy the vaporized gas of the cargo liquid, and Since it is guided to the air-cooling type heat exchanger to be cooled and liquefied, it is possible to prevent the breakdown of the device due to the freezing of seawater.
【００１１】[0011]
【実施例】以下、本発明の低温式ＬＰＧ船の再液化装置
を図１及び図２に示す実施例に基づいて説明する。図１
は本発明の低温式ＬＰＧ船の再液化装置の第１実施例を
示す系統図、図２は本発明の低温式ＬＰＧ船の再液化装
置の第２実施例を示す系統図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS A reliquefaction apparatus for a low temperature type LPG ship according to the present invention will be described below with reference to the embodiments shown in FIGS. FIG.
Is a system diagram showing a first embodiment of a reliquefaction device for a low temperature LPG ship of the present invention, and FIG. 2 is a system diagram showing a second embodiment of a reliquefaction device for a low temperature LPG ship of the present invention.
【００１２】図１において、１１は再液化装置４の凝縮
器４ｂへ海水を導く上甲板海水管１１ａと、蒸発ガスを
冷却した後の海水を凝縮器４ｂから船外に排出する上甲
板海水管１１ｂからなる海水系統で、これら上甲板海水
管１１ａ，１１ｂの途中に遮断弁１２ａ，１２ｂが介設
されている。In FIG. 1, reference numeral 11 denotes an upper deck seawater pipe 11a for guiding seawater to the condenser 4b of the reliquefaction device 4, and an upper deck seawater pipe for discharging seawater after cooling the evaporative gas from the condenser 4b to the outboard. In the seawater system consisting of 11b, shutoff valves 12a, 12b are provided in the middle of these upper deck seawater pipes 11a, 11b.
【００１３】１３は前記遮断弁１２ａ，１２ｂと凝縮器
４ｂの間に設置された不凍液の循環系統であり、次のよ
うな構成である。１３ａは凝縮器４ｂにおいて加圧され
た貨物液の蒸発ガスとの熱交換によって昇温した不凍液
を冷却する空冷式熱交換器であり、前記遮断弁１２ａ，
１２ｂと凝縮器４ｂの間の上甲板海水管１１ａ，１１ｂ
に連通する循環用配管１３ｂの途中に設置されている。Reference numeral 13 is a circulation system for the antifreeze liquid, which is installed between the shutoff valves 12a and 12b and the condenser 4b, and has the following structure. Reference numeral 13a denotes an air-cooling type heat exchanger for cooling the antifreeze liquid heated by heat exchange with the vaporized gas of the cargo liquid pressurized in the condenser 4b.
Upper deck seawater pipes 11a, 11b between 12b and the condenser 4b
Is installed in the middle of the circulation pipe 13b communicating with the.
【００１４】そして、寒冷地において、この不凍液の循
環系統１３を使用する場合には、先ず、上甲板海水管１
１ａ，１１ｂの途中に介設した遮断弁１２ａ，１２ｂを
閉じて海水系統１１を遮断した後、前記配管１３ｂにお
ける上甲板海水管１１ａ，１１ｂとの連通部近傍に介設
した弁１３ｃを開け、同じく配管１３ｂ途中に設置した
循環ポンプ１３ｄを駆動して、空冷式熱交換器１３ａと
凝縮器４ｂとの間で不凍液を循環させ、凝縮器４ｂにお
いて前記蒸発ガスを凝縮・液化させる。なお、蒸発ガス
との熱交換によって昇温した不凍液は空冷式熱交換器１
３ａに戻され、ここで空冷ファン１３ｅより送られる寒
冷の外気と熱交換して冷却される。When using the antifreeze circulation system 13 in a cold region, first, the upper deck seawater pipe 1 is used.
After shutting off the shutoff valves 12a, 12b provided in the middle of 1a, 11b to shut off the seawater system 11, a valve 13c provided near the communicating portion with the upper deck seawater pipes 11a, 11b in the pipe 13b is opened. Similarly, the circulation pump 13d installed in the middle of the pipe 13b is driven to circulate the antifreeze liquid between the air-cooled heat exchanger 13a and the condenser 4b, and the vaporized gas is condensed and liquefied in the condenser 4b. In addition, the antifreeze liquid heated by the heat exchange with the evaporative gas is the air-cooled heat exchanger 1.
It is returned to 3a, where it is cooled by exchanging heat with the cold outside air sent from the air cooling fan 13e.
【００１５】ところで、不凍液は使用する外気条件にも
よるが、例えば重量成分で７０％程度のエチレングリコ
ール水溶液を使用すれば、不凍液の氷点は−５０℃以下
に達するので、ほとんどいかなる寒冷地でも対応でき
る。また、エチレングリコールは海水（３．５％程度の
塩分を含有）と混合しても、氷点が清水と同様に低下す
るだけであるので、寒冷地では凝縮器４ｂ側に残った海
水を排水しなくても、そのまま不凍液として循環するこ
とができる。By the way, although the antifreeze solution depends on the outside air conditions to be used, the freezing point of the antifreeze solution reaches −50 ° C. or lower if, for example, a 70% by weight ethylene glycol aqueous solution is used, it can be used in almost any cold region. it can. Even if ethylene glycol is mixed with seawater (containing about 3.5% of salt), the freezing point only lowers like fresh water. Therefore, in cold regions, the seawater remaining on the condenser 4b side is drained. Even without it, it can be circulated as an antifreeze as it is.
【００１６】そこで、本実施例では、例えば純粋なエチ
レングリコール水溶液を貯蔵してある膨張タンク１３ｆ
を設置して、この膨張タンク１３ｆと前記配管１３ｂを
バイパス管１３ｇで接続している。そして、不凍液の循
環系統１３を使用するのに先立って、膨張タンク１３ｆ
に設置した排出側のバイパス管１３ｇの途中に設置した
弁１３ｈを開け、前記配管１３ｂの空冷式熱交換器１３
ａの入り側に設置した弁１３ｉを閉じて、遮断弁１２
ａ，１２ｂより凝縮器４ｂ側に残った海水を、空冷式熱
交換器１３ａを通さずに膨張タンク１３ｆ経由で循環さ
せ、膨張タンク１３ｆから純粋なエチレングリコール水
溶液を補給注入することで、残った海水全体を適正な濃
度に調整し、不凍液として使用するものを開示してい
る。なお、遮蔽弁１２ａ，１２ｂより反凝縮器側の上甲
板海水管１１ａ，１１ｂ内に残った海水は、寒冷地で凍
結するおそれがあるが、寒冷地では冷媒供給には使用せ
ず、また、暖地に戻れば再び融解するので、大まかな残
水抜きを行っておけば充分である。Therefore, in this embodiment, for example, an expansion tank 13f storing a pure ethylene glycol aqueous solution.
Is installed and the expansion tank 13f and the pipe 13b are connected by a bypass pipe 13g. And before using the circulation system 13 of the antifreeze liquid, the expansion tank 13f
The valve 13h installed in the middle of the discharge side bypass pipe 13g installed in the above is opened, and the air-cooled heat exchanger 13 of the pipe 13b is opened.
By closing the valve 13i installed on the inlet side of a, the shutoff valve 12
Seawater remaining on the condenser 4b side from a and 12b is circulated through the expansion tank 13f without passing through the air-cooling type heat exchanger 13a, and the pure ethylene glycol aqueous solution is replenished and injected from the expansion tank 13f to remain. It discloses that the whole seawater is adjusted to an appropriate concentration and used as an antifreeze. Note that the seawater remaining in the upper deck seawater pipes 11a, 11b on the anti-condenser side of the shutoff valves 12a, 12b may freeze in cold regions, but is not used for refrigerant supply in cold regions, and It will melt again when it returns to a warm place, so rough drainage is sufficient.
【００１７】海水の冷媒としての最低限界温度は氷点
（−２℃）であるが、不凍液はさらに低い温度（外気に
近い温度）まで使用可能であり、冷媒温度が低ければ貨
物液の蒸発ガスの凝縮温度も低くなる。従って、上記し
た図１に示す本発明の再液化装置を使用すれば、蒸発ガ
スの凝縮温度が低くなることにより、圧縮機で加圧する
蒸発ガスの吐出圧力（凝縮圧力）も海水を使用した場合
よりも低くすることができ、その分、寒冷地では圧縮機
の所要動力を小さくすることが可能で、省エネルギー効
果が得られる。The minimum limit temperature of seawater as a refrigerant is the freezing point (-2 ° C.), but the antifreeze can be used at a lower temperature (a temperature close to the outside air). The condensation temperature will also be lower. Therefore, when the reliquefaction apparatus of the present invention shown in FIG. 1 described above is used, the condensation temperature of the evaporative gas becomes low, and the discharge pressure (condensing pressure) of the evaporative gas pressurized by the compressor also uses seawater. The power required for the compressor can be reduced in cold regions and the energy saving effect can be obtained.
【００１８】図２は本発明の再液化装置の第２の実施例
であり、高温の蒸発ガスを直接寒冷な外気で冷却するも
のである。図２において、１４は圧縮機４ａと凝縮器４
ｂの間に設置された蒸発ガスの循環系統であり、この循
環系統１４の途中に空冷式熱交換器１４ａを介設してい
る。FIG. 2 shows a second embodiment of the reliquefaction apparatus of the present invention, in which high-temperature evaporative gas is directly cooled by cold outside air. In FIG. 2, 14 is a compressor 4a and a condenser 4
This is a circulation system for the evaporative gas installed between b, and an air-cooling type heat exchanger 14a is provided in the middle of this circulation system 14.
【００１９】そして、寒冷地において、この循環系統１
４を使用する場合には、先ず、上甲板海水管１１ａ，１
１ｂの途中に介設した遮断弁１２ａ，１２ｂを閉じて海
水系統１１を遮断した後、圧縮機４ａと凝縮器４ｂをつ
なぐ配管４ｄの途中に介設した弁１４ｂを閉じる。そし
て、循環系統１４の空冷式熱交換器１４ａの入り側及び
出側の配管１４ｅの途中に介設した弁１４ｃを開けて、
蒸発ガスを空冷式熱交換器１４ａに導く。この空冷式熱
交換器１４ａに導かれた蒸発ガスは、ファン１４ｄによ
って強制的に送られた寒冷の外気と熱交換し、冷却・液
化されたのち再度凝縮機４ｂに送られる。In a cold region, this circulation system 1
When using 4, upper deck seawater pipes 11a, 1
After shutting off the shutoff valves 12a, 12b provided in the middle of 1b to shut off the seawater system 11, the valve 14b provided in the middle of the pipe 4d connecting the compressor 4a and the condenser 4b is closed. Then, the valve 14c provided in the middle of the inlet side and outlet side pipes 14e of the air-cooled heat exchanger 14a of the circulation system 14 is opened,
The evaporated gas is guided to the air-cooled heat exchanger 14a. The evaporative gas guided to the air-cooled heat exchanger 14a exchanges heat with the cold outside air forcibly sent by the fan 14d, is cooled and liquefied, and is then sent to the condenser 4b again.
【００２０】このように、上記した図２に示す本発明の
再液化装置を使用すれば、寒冷地で海水を使用する必要
がなくなり、海水の凍結を防止できるとともに、蒸発ガ
スの凝縮温度も低くできるので、圧縮機で加圧する蒸発
ガスの吐出圧力（凝縮圧力）も海水を使用した場合より
も低くすることができ、その分、寒冷地では圧縮機の所
要動力を小さくすることが可能で、省エネルギー効果が
得られる。As described above, by using the reliquefaction apparatus of the present invention shown in FIG. 2, it is not necessary to use seawater in cold regions, freezing of seawater can be prevented, and the condensation temperature of evaporative gas is low. Since it is possible, the discharge pressure (condensation pressure) of the evaporative gas pressurized by the compressor can also be made lower than when seawater is used, and the power required for the compressor can be reduced in cold regions. Energy saving effect can be obtained.
【００２１】なお、暖地では、外気温度が高く、昇温し
た不凍液や蒸発ガスを充分に空冷できないので、通常通
り海面下から海水を取水し、再液化装置の凝縮器に冷媒
として供給する。In warm regions, the outside air temperature is high, and the heated antifreeze liquid and evaporative gas cannot be sufficiently air-cooled, so seawater is taken from below the sea surface as usual and supplied to the condenser of the reliquefaction device as a refrigerant.
【００２２】[0022]
【発明の効果】以上説明したように、本発明の再液化装
置によれば、低温式ＬＰＧ船が、寒冷地を航行する場合
に、冷媒である海水が低温外気のために凍結することに
起因する各種の不都合を全て解決できる。加えて本発明
の再液化装置によれば、蒸発ガスの凝縮温度も低くでき
るので、圧縮機で加圧する蒸発ガスの吐出圧力（凝縮圧
力）も海水を使用した場合よりも低くすることができ、
その分、寒冷地では圧縮機の所要動力を小さくすること
が可能で、省エネルギー効果が得られる。As described above, according to the reliquefaction apparatus of the present invention, when the low temperature type LPG ship navigates in a cold region, seawater as a refrigerant freezes due to low temperature outside air. All of the various inconveniences that occur can be solved. In addition, according to the reliquefaction device of the present invention, the condensation temperature of the evaporative gas can be lowered, so that the discharge pressure (condensing pressure) of the evaporative gas pressurized by the compressor can be lower than that when seawater is used.
As a result, the power required for the compressor can be reduced in cold regions, and an energy saving effect can be obtained.
【図１】本発明の低温式ＬＰＧ船の再液化装置の第１実
施例を示す系統図である。FIG. 1 is a system diagram showing a first embodiment of a reliquefaction device for a low temperature type LPG ship of the present invention.
【図２】本発明の低温式ＬＰＧ船の再液化装置の第２実
施例を示す系統図である。FIG. 2 is a system diagram showing a second embodiment of a reliquefaction device for a low temperature type LPG ship of the present invention.
【図３】低温式ＬＰＧ船に設置された従来の再液化装置
の一例を示す系統図である。FIG. 3 is a system diagram showing an example of a conventional reliquefaction device installed in a low temperature type LPG ship.
１ 低温式ＬＰＧ船 ２ 貨物タンク ３ 貨物液 ３ａ 蒸発ガス ４ 再液化装置 ４ｂ 凝縮器 ５ 海水 １１ 海水系統 １２ａ 遮断弁 １２ｂ 遮断弁 １３ 不凍液の循環系統 １３ａ 空冷式熱交換機 １３ｄ 循環ポンプ １３ｆ 膨張タンク １３ｇ バイパス管 １４ 蒸発ガスの循環系統 １４ａ 空冷式熱交換機 1 Low-temperature LPG ship 2 Cargo tank 3 Cargo liquid 3a Evaporative gas 4 Reliquefaction device 4b Condenser 5 Seawater 11 Seawater system 12a Cutoff valve 12b Cutoff valve 13 Antifreeze circulation system 13a Air-cooled heat exchanger 13d Circulation pump 13f Expansion tank 13g Bypass Tube 14 Evaporative gas circulation system 14a Air-cooled heat exchanger
Claims (3)
内に荷役した貨物液の蒸発ガスを導いてこれを凝縮・液
化し、貨物タンクに戻す再液化装置において、凝縮器へ
海水を導くと共に、蒸発ガスを冷却した後の海水を凝縮
器から船外に排出する海水系統の途中に遮断弁を介設
し、これら遮断弁と凝縮器の間に、空冷式熱交換器を介
設した不凍液の循環系統を設置し、寒冷地では海水に代
えて不凍液を凝縮器に導いて蒸発ガスを凝縮・液化する
ことを特徴とする低温式ＬＰＧ船の再液化装置。1. A reliquefaction device installed in a low-temperature LPG carrier, which guides the vaporized gas of cargo liquid loaded in a cargo tank, condenses and liquefies it, and returns it to the cargo tank, while guiding seawater to a condenser. , An antifreeze liquid with a shutoff valve installed in the middle of the seawater system that discharges the seawater after cooling the evaporative gas from the condenser to the outside of the ship, and an air-cooled heat exchanger between the shutoff valve and the condenser. A re-liquefaction device for a low-temperature LPG ship, which is equipped with a circulation system for the low-temperature LPG ship that condenses and liquefies the evaporative gas by introducing an antifreeze liquid to a condenser instead of seawater in cold regions.
介設した遮断弁より凝縮器側に残った海水を適正な濃度
に調整して不凍液として使用するための、不凍液を満た
した膨張タンクを、バイパス管を介して設置したことを
特徴とする請求項１記載の低温式ＬＰＧ船の再液化装
置。2. An expansion tank filled with an antifreeze liquid for use as an antifreeze liquid by adjusting the seawater remaining on the condenser side of a shutoff valve provided in the middle of the seawater system to an appropriate concentration in the antifreeze liquid circulation system. 2. The reliquefaction device for a low temperature type LPG ship according to claim 1, wherein the device is installed via a bypass pipe.
装置における不凍液の循環系統に代えて、圧縮機と凝縮
器の間に蒸発ガスの循環系統を設けるとともに、この循
環系統の途中に空冷式の熱交換器を介設し、寒冷地では
この熱交換器によって蒸発ガスを冷却・液化することを
特徴とする低温式ＬＰＧ船の再液化装置。3. A circulation system for evaporating gas is provided between the compressor and the condenser in place of the circulation system for the antifreeze liquid in the reliquefaction device of the low temperature LPG ship according to claim 1, and the circulation system is provided in the middle of this circulation system. A reliquefaction device for a low-temperature LPG ship, which is equipped with an air-cooling type heat exchanger and cools and liquefies the evaporative gas by this heat exchanger in cold regions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2767696A JPH09221098A (en) | 1996-02-15 | 1996-02-15 | Reliquifing device for low temperature lpg ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2767696A JPH09221098A (en) | 1996-02-15 | 1996-02-15 | Reliquifing device for low temperature lpg ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09221098A true JPH09221098A (en) | 1997-08-26 |
Family
ID=12227571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2767696A Pending JPH09221098A (en) | 1996-02-15 | 1996-02-15 | Reliquifing device for low temperature lpg ship |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09221098A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100885796B1 (en) * | 2007-07-19 | 2009-02-26 | 대우조선해양 주식회사 | Boil-off gas reliquefaction apparatus |
| WO2011099184A1 (en) * | 2010-02-09 | 2011-08-18 | 三菱重工業株式会社 | Reliquefaction device mounted on liquefied gas carrying ship |
| KR101121619B1 (en) * | 2009-06-11 | 2012-02-28 | 에스티엑스조선해양 주식회사 | Apparatus for discharging sea water for regassificating of LNG carrier and method the same |
| KR101291947B1 (en) * | 2005-12-28 | 2013-07-31 | 바르실라 핀랜드 오이 | Arrangement for and method of providing cooling energy to a cooling medium circuit of a marine vessel |
| KR20130121871A (en) * | 2010-11-18 | 2013-11-06 | 쉘 인터내셔날 리써취 마트샤피지 비.브이. | Water intake riser assembly for an off-shore structure, and method of producing a liquefied hydrocarbon stream and method of producing a vaporous hydrocarbon stream |
| JP2014122284A (en) * | 2012-12-21 | 2014-07-03 | Japan Petroleum Exploration Co Ltd | Facility for recovering crude lpg from flare gas |
| CN108020022A (en) * | 2017-11-24 | 2018-05-11 | 南通象屿海洋装备有限责任公司 | A kind of new Cargo Oil temperature control system and temperature control method for chemical tanker |
-
1996
- 1996-02-15 JP JP2767696A patent/JPH09221098A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101291947B1 (en) * | 2005-12-28 | 2013-07-31 | 바르실라 핀랜드 오이 | Arrangement for and method of providing cooling energy to a cooling medium circuit of a marine vessel |
| KR100885796B1 (en) * | 2007-07-19 | 2009-02-26 | 대우조선해양 주식회사 | Boil-off gas reliquefaction apparatus |
| KR101121619B1 (en) * | 2009-06-11 | 2012-02-28 | 에스티엑스조선해양 주식회사 | Apparatus for discharging sea water for regassificating of LNG carrier and method the same |
| WO2011099184A1 (en) * | 2010-02-09 | 2011-08-18 | 三菱重工業株式会社 | Reliquefaction device mounted on liquefied gas carrying ship |
| JP2011162038A (en) * | 2010-02-09 | 2011-08-25 | Mitsubishi Heavy Ind Ltd | Reliquefying device mounted on liquefied gas carrying vessel |
| KR101258324B1 (en) * | 2010-02-09 | 2013-04-25 | 미츠비시 쥬고교 가부시키가이샤 | Reliquefying device installed on liquefied gas carrier |
| KR20130121871A (en) * | 2010-11-18 | 2013-11-06 | 쉘 인터내셔날 리써취 마트샤피지 비.브이. | Water intake riser assembly for an off-shore structure, and method of producing a liquefied hydrocarbon stream and method of producing a vaporous hydrocarbon stream |
| JP2014122284A (en) * | 2012-12-21 | 2014-07-03 | Japan Petroleum Exploration Co Ltd | Facility for recovering crude lpg from flare gas |
| CN108020022A (en) * | 2017-11-24 | 2018-05-11 | 南通象屿海洋装备有限责任公司 | A kind of new Cargo Oil temperature control system and temperature control method for chemical tanker |
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