WO2013002056A1 - 再ガス化可能なngh輸送船、及び、ngh輸送船におけるngh再ガス化方法 - Google Patents
再ガス化可能なngh輸送船、及び、ngh輸送船におけるngh再ガス化方法 Download PDFInfo
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- WO2013002056A1 WO2013002056A1 PCT/JP2012/065515 JP2012065515W WO2013002056A1 WO 2013002056 A1 WO2013002056 A1 WO 2013002056A1 JP 2012065515 W JP2012065515 W JP 2012065515W WO 2013002056 A1 WO2013002056 A1 WO 2013002056A1
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- ngh
- circulating water
- cargo hold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
- B63J2/14—Heating; Cooling of liquid-freight-carrying tanks
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/108—Production of gas hydrates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/34—Other details of the shaped fuels, e.g. briquettes
- C10L5/36—Shape
- C10L5/363—Pellets or granulates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
Definitions
- the present invention relates to a regasifiable NGH transport ship capable of efficiently regasifying NGH mounted in a hold of an NGH (natural gas hydrate) transport ship with a simple configuration using circulating water, and NGH.
- the present invention relates to an NGH regasification method in a transport ship.
- NGH transport ships that are responsible for marine transportation of natural gas hydrate (hereinafter referred to as NGH) are equipped with mechanical cargo handling equipment for transporting NGH, assuming that the unloaded NGH pellets are regasified on land.
- NGH regas transport ship a regasizable NGH transport ship equipped with a regasification facility in the ship of an NGH transport ship on the assumption that the gas regasified on the ship is unloaded.
- NGH regasification equipment is required on the ship, but it is not necessary to provide a mechanical cargo handling device for NGH discharge on the ship.
- NGH transport ship capable of regasification is expected as a ship that plays an important role in both transportation and regasification. .
- a gas engine generator includes a stored NGH tank and an NGH decomposition device that decomposes NGH supplied from the NGH tank to generate fuel gas, and uses the fuel gas generated by the NGH gasification device.
- NGH decomposition device that decomposes NGH supplied from the NGH tank to generate fuel gas, and uses the fuel gas generated by the NGH gasification device.
- This ship's NGH decomposition apparatus transports NGH decomposition tank and NGH decomposition hot water from the NGH tank in the NGH decomposition tank and sprays it from above the NGH pellets stored on the net, thereby decomposing NGH.
- the decomposed natural gas is taken out from the gas outlet provided above the NGH decomposition tank and supplied to the gas engine generator.
- the decomposed NGH decomposition water passes through a net stretched at the bottom of the NGH decomposition tank, is separated from the NGH pellets, is taken out from a drain outlet provided below the NGH decomposition tank, and heated with a water heater. Alternatively, after the temperature is raised by heat exchange with seawater or the like, it is used as hot water for NGH decomposition.
- NGH NGH It is possible to regasify in the cargo hold. This is more efficient because it eliminates the need for space, piping and equipment for the regasification apparatus, and transport equipment from the NGH cargo hold to the regasification apparatus.
- the present invention has been made in view of the above situation, and its object is to stably and efficiently recycle NGH pellets in an NGH cargo hold of an NGH (natural gas hydrate) transport ship with a simple configuration.
- An object of the present invention is to provide an NGH transport ship that can be regasified and an NGH regasification method in an NGH transport ship.
- the regasifiable NGH (natural gas hydrate) transport ship of the present invention heats the NGH cargo hold for storing the NGH pellets and the circulating water as the heat source for decomposing the NGH pellets.
- a gas discharge pipe for deriving cracked gas and a circulating water sprinkler for spraying circulating water are provided, and the circulating water in the NGH cargo hold is opened from the opening to the inside of the NGH cargo hold from the bottom of the NGH cargo hold.
- the circulating water that is the heat source for decomposing the NGH pellets from the top of the cargo hold of the NGH pellets is frozen in the NGH pellet layer and almost penetrates into the NGH pellet layer.
- the accumulated circulating water is allowed to pass through the circulating water downcomer (vertical hole) provided inside the NGH cargo hold and the NGH cargo hold. It can be lowered below the bottom and led from the drain pipe connected to the lower part of the circulating water down pipe to the circulating water pipe outside the NGH cargo hold.
- This circulating water downcomer has an opening so that the circulating water above the NGH pellet layer can be introduced into the circulating water downcomer even when the NGH pellet layer is lowered due to the decomposition of the NGH pellets in the NGH cargo hold.
- the heat exchanger and the circulation pump are disposed in a section provided between the engine room and the NGH cargo hold in front of the engine room.
- the circulation pump is driven by a drive source provided in a non-hazardous section of the engine room or the motor room adjacent to the engine room, the circulation pump is driven from the engine room in the explosion-proof area (non-hazardous area). Therefore, a non-explosion-proof drive source can be used.
- NGH is regasified at the landing site, and the cracked water generated by regasification is returned to the loading area, so that the seawater ballast is not loaded into the loading area.
- a dedicated ballast tank and a ballast water treatment device are not required, so that the space in the ship can be used effectively and the cost can be reduced.
- the NGH cargo hold is provided with a pressure-resistant structure to increase the gasification pressure in the NGH cargo hold
- the gas gasified in the NGH transport ship Is supplied by being compressed by a gas compressor in accordance with the demand side demand value.
- the size of the gas compressor can be reduced, and the power can be reduced.
- the NGH regasification method in the NGH transport ship of this invention for achieving said objective sprinkles the circulating water used as the heat source which decomposes
- the NGH decomposition gas generated by the decomposition of the circulating water is led out from the gas discharge pipe provided in the upper part of the NGH cargo hold, and the circulating water in the NGH cargo hold is discharged from the opening into the circulating water descending pipe.
- To the drainage pipe arranged below the bottom of the NGH cargo hold, and the circulating water led to the drainage pipe is circulated to the heat exchanger by the circulation water pipe and the circulation pump. Then, heat is exchanged between the circulating water and seawater in the heat exchanger, the temperature of the circulating water is raised, and water is sprayed again from the upper part of the NGH cargo hold.
- the circulating water that is a heat source for decomposing the NGH pellets fed from the top of the NGH cargo hold is frozen in the NGH pellet layer and hardly penetrates into the NGH pellet layer.
- the accumulated circulating water passes through the circulating water downcomer provided inside the NGH cargo hold and is below the bottom of the NGH cargo hold. The water can be lowered and led from the drain pipe connected to the lower part of the circulating water down pipe to the circulating water pipe outside the NGH cargo hold.
- the circulating water that is a heat source for decomposing NGH is frozen in the NGH pellet layer to form an NGH pellet layer.
- the staying circulating water passes through the vertical circulating water downcomer (vertical hole) provided inside the NGH cargo hold, and the NGH cargo It can be lowered below the bottom of the granule, and can be led from the drain pipe connected to the lower part of the circulating water down pipe to the circulating water pipe outside the NGH cargo hold.
- the circulating water sprayed from the top of the NGH cargo hold through the circulating water downcomer is drained to the drain pipe at the bottom of the NGH cargo hold, so that the circulating water stays at the top of the NGH pellet layer and overflows. Can be prevented.
- the NGH mounted in the hold of the NGH transport ship can be efficiently regasified with a simple structure using the circulating water.
- the NGH transport ship according to the present invention and the NGH regasification method in the NGH transport ship are provided in an NGH transport ship equipped with a mechanical cargo handling device for unloading the NGH pellets without regasification.
- a mechanical cargo handling device for unloading the NGH pellets without regasification.
- it can be used for gasification in case of an emergency when the mechanical cargo handling device or the land-side lifted cargo handling device fails.
- FIG. 1 is a side sectional view showing a configuration of a regasifiable NGH transport ship according to an embodiment of the present invention.
- FIG. 2 is a plan view showing the configuration of the regasifiable NGH transport ship of FIG.
- FIG. 3 is an enlarged side cross-sectional view of the NGH cargo hold.
- FIG. 4 is an enlarged front cross-sectional view of the NGH cargo hold.
- the regasizable NGH transport ship 1 As shown in FIGS. 1 and 2, the regasizable NGH transport ship 1 according to the embodiment of the present invention is located at the rear part of the inboard space surrounded by the ship bottom 2, the ship side outer plate 3 and the upper deck 4.
- An engine room 5 is provided, and a propeller 6 driven by an engine (not shown) provided in the engine room 5 is provided at the stern.
- a rudder 7 is provided behind the stern propeller 6 and a living area 8 having a bridge is provided above the engine room 5.
- a plurality of NGH cargo holds 10 for storing NGH pellets are provided in front of the engine room 5 in the inboard space.
- a gas discharge pipe 11 for deriving a decomposition gas of NGH pellets is provided at the upper part of the NGH cargo hold 10, and a gas discharge main pipe 12 to which the gas discharge pipe 11 is connected is provided.
- the gas discharge main pipe 12 is provided so as to be connectable to a landed unloading pipe via a gas compressor (not shown).
- the natural gas decomposed in the NGH cargo hold 10 is pumped by a gas compressor via the gas discharge pipe 11 and the gas discharge main pipe 12 so that it can be unloaded to the land-side lift pipe.
- a circulating water sprinkler 13 for sprinkling circulating water serving as a heat source for decomposing NGH pellets is provided at the top of each NGH cargo hold 10.
- the circulating water sprinkler 13 is connected to an upper circulating water pipe 15 via a circulating water supply pipe 14.
- the circulating water downcomer 16 is provided inside the NGH cargo hold 10.
- the circulating water downcomer 16 is formed with an opening 16a into which NGH pellets larger than a preset particle diameter do not enter, and the circulating water in the NGH cargo hold 10 is supplied from the opening 16a to the NGH cargo hold 10. It is configured to lead to a lower circulating water pipe 18 via a drain pipe 17 disposed below the bottom 10a.
- this circulating water downcomer can introduce the circulating water in the upper part of the NGH pellet layer into the circulating water downcomer 16 even when the NGH pellet layer is lowered due to the decomposition of the NGH pellet in the NGH cargo hold.
- the openings 16 a are provided at a plurality of positions in the vertical direction of the circulating water downcomer 16.
- a partition is provided between the engine room 5 and the NGH cargo hold 10 in front of the engine room 5 to form a pump room 20, and heat is supplied to this pump room 20 to the circulating water as a heat source for decomposing NGH pellets.
- a circulation pump 21 for circulating the circulating water between the NGH cargo hold 10 and the heat exchanger 22 by piping.
- the circulation pump 21 is driven by the drive source provided in the engine room 5, the circulation pump 21 is driven from the engine room 5 in the explosion-proof area. Can be non-explosion proof.
- the lower circulating water pipe 18 is connected to the circulating pump 21, and the upper circulating water pipe 15 is connected to the heat exchanger 22.
- the lower circulating water pipe 18 may be connected to the heat exchanger 22, and the upper circulating water pipe 15 may be connected to the circulating pump 21.
- the heat exchanger 22 may be installed in a gas equipment room provided on the ship, not in the same section as the circulation pump.
- the NGH regasification method performed in the regastable NGH transport ship 1 having this configuration is an NGH regasification method performed when gasifying NGH pellets and unloading them in a gas state, and operating the circulation pump 21 to accommodate the NGH pellets.
- the circulating water having a seawater temperature or the like serving as a heat source for decomposing the NGH pellets is sprinkled from the circulating water sprinkler 13 at the tip of the circulating water supply pipe 14.
- Decomposed gas of NGH generated by heat decomposition is led out from a gas discharge pipe 11 provided in the upper part of the NGH cargo hold 10.
- the amount of gasification in the NGH cargo hold 10 can be controlled by the temperature of the circulating water and the input amount.
- the decomposed water generated by NGH decomposition can be used as the circulating water, the initial circulating water may be a small amount.
- the circulating water in the NGH cargo hold 10 is introduced into the circulating water descending pipe 16 from the opening 16a and led to the drain pipe 17 arranged below the bottom 10a of the NGH cargo hold 10,
- the circulating water led out to the drain pipe 17 is sent to the lower circulating water pipe 18.
- NGH pellets having a large particle size enter from the drain pipe 17 through the lower circulating water pipe 18, in which the NGH pellets are gasified, and the gasified natural gas is conveyed to the circulation pump 21.
- the performance of the circulation pump 21 is remarkably deteriorated, in order to prevent this, only an NGH pellet having a small particle size that can be gasified in the circulating water downcomer 16 is allowed to pass through the opening 16a. It is preferable to form the opening 16a in a structure in which NGH pellets larger than a preset particle diameter do not enter.
- the circulating water sent to the lower circulating water pipe 18 is circulated to the heat exchanger 22 by the circulation pump 21 and exchanges heat with the seawater in the heat exchanger 22.
- the circulating water whose temperature has been increased by this heat exchange is again sprinkled into the NGH cargo hold 10 from the circulating water sprinkler 13 at the tip of the circulating water supply pipe 14 via the upper circulating water pipe 15.
- the thermal energy of seawater can be transmitted to the NGH pellets in the NGH cargo hold 10 through the circulating water, and the NGH pellets can be decomposed.
- the circulation pump 21 is stopped and the lifting and unloading operation is terminated.
- the circulation pump 21 is used for circulation of circulating water, a separate pump for supplying seawater to the heat exchanger 22 is provided to transfer the thermal energy of the seawater to the circulation water during regasification. Need to continue.
- the gas gasified in the NGH transport ship 1 is compressed and supplied by a gas compressor in accordance with the demand side demand value, but the NGH cargo hold 10 has a pressure resistant structure, 10 to increase the gasification pressure.
- the pressure in the gas compressor is reduced compared to the gasification in the vicinity of the atmospheric pressure, and the gas compression is performed. The size of the machine can be reduced and the power can be reduced.
- the gas pressure required on land is about 5 MPa (gauge pressure)
- the circulating water that is a heat source for decomposing NGH is frozen in the NGH pellet layer, and the NGH pellet.
- the circulating water staying in the upper part of the NGH pellet layer passes through the vertical circulating water downcomer 16 provided inside the NGH cargo hold 10 to pass through the NGH pellet layer. It can be lowered below the bottom 10 a of the cargo hold 10 and led from the drain pipe 17 connected to the lower part of the circulating water down pipe 16 to the circulating water pipe 18 outside the NGH cargo hold 10.
- the circulating water sprayed from the upper part of the NGH cargo hold 10 can be drained to the drain pipe 17 below the bottom 10a of the NGH cargo hold 10, it is possible to prevent the circulating water from staying at the upper part of the NGH pellet layer and overflowing. it can.
- the NGH pellets mounted in the NGH cargo hold 10 of the recyclable NGH transport ship 1 can be efficiently regasified using the circulating water.
- the NGH pellet can be stably and efficiently regasified with a simple configuration.
- the NGH pellets in the NGH cargo hold of the NGH transport ship can be easily Since it can regasify stably and efficiently with a structure, it can utilize for an NGH transport ship.
- gasification in the event of a failure of this mechanical cargo handling device or the landside cargo handling device will occur. Available for use.
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Abstract
Description
5 機関室
10 NGH貨物倉
10a 底部
11 ガス排出配管
12 ガス排出用本管
13 循環水散水装置
14 循環水供給用配管
15 上部の循環水用配管
16 循環水降下管
16a 開口部
17 排水配管
18 下部の循環水用配管
20 ポンプ室
21 循環用ポンプ
22 熱交換器
Claims (6)
- NGHペレットを収容するNGH貨物倉と、NGHペレットを分解する熱源となる循環水に熱を供給する熱交換器と、循環水を前記NGH貨物倉と前記熱交換器との間を循環させるための循環水用配管と循環用ポンプを備えると共に、
前記NGH貨物倉の上部に、NGHペレットの分解ガスを導出するガス排出配管と、循環水を散水する循環水散水装置を設け、
更に、前記NGH貨物倉の内部に、開口部から前記NGH貨物倉内の循環水を前記NGH貨物倉の底部よりも下に配置された排水配管を経由して前記循環水用配管に導く循環水降下管を設けたことを特徴とする再ガス化可能なNGH輸送船。 - 前記熱交換器及び前記循環用ポンプを機関室と該機関室の前方のNGH貨物倉との間に設けた区画に配置すると共に、該区画に隣接する機関室もしくは電動機室の非危険区画に設けた駆動源により前記循環用ポンプを駆動することを特徴とする請求項1に記載の再ガス化可能なNGH輸送船。
- NGHの再ガス化で発生する分解水を循環水として利用することを特徴とする請求項1又は2に記載の再ガス化可能なNGH輸送船。
- 揚げ地でNGHを再ガス化し、再ガス化で発生した分解水を積み地に持ち返ることで、海水バラストが不要となることを特徴とする請求項1~3のいずれか1項に記載の再ガス化可能なNGH輸送船。
- 前記NGH貨物倉に耐圧構造を持たせて、NGH貨物倉内でのガス化圧力を上げることを特徴とする請求項1~4のいずれか1項に記載の再ガス化可能なNGH輸送船。
- NGHペレットを収容しているNGH貨物倉内の上部から、NGHペレットを分解する熱源となる循環水を散水し、
該循環水の熱により分解して発生したNGHの分解ガスを前記NGH貨物倉の上部に設けたガス排出配管から導出すると共に、
前記NGH貨物倉内の循環水を開口部から循環水降下管内に導入して、前記NGH貨物倉の底よりも下に配置された排水配管に導出して、
該排水配管に導出された循環水を循環水用配管と循環用ポンプにより熱交換器に循環させて、該熱交換器において循環水と海水との間で熱交換させて、循環水の温度を上昇させて、再び、前記NGH貨物倉の上部から散水することを特徴とするNGH輸送船におけるNGH再ガス化方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN201280032214.6A CN103619700B (zh) | 2011-06-29 | 2012-06-18 | 能够再气化的ngh运输船以及ngh运输船的ngh再气化方法 |
BR112013032820A BR112013032820A2 (pt) | 2011-06-29 | 2012-06-18 | embarcação de transporte de regaseificação de hgn e método de regaseificação de hgn em embarcação de transporte de hgn |
KR1020137028421A KR101590848B1 (ko) | 2011-06-29 | 2012-06-18 | 재가스화 가능한 ngh 수송선, 및 ngh 수송선에서의 ngh 재가스화 방법 |
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JP2011143905A JP5739248B2 (ja) | 2011-06-29 | 2011-06-29 | 再ガス化可能なngh輸送船、及び、ngh輸送船におけるngh再ガス化方法 |
JP2011-143905 | 2011-06-29 |
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JP (1) | JP5739248B2 (ja) |
KR (1) | KR101590848B1 (ja) |
CN (1) | CN103619700B (ja) |
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JP6248002B2 (ja) * | 2014-06-16 | 2017-12-13 | 旭海運 株式会社 | ばら積み船の窒素ガス供給設備 |
JP5953363B2 (ja) * | 2014-12-25 | 2016-07-20 | 三井造船株式会社 | 液化ガス貯蔵設備を備えた浮体構造物 |
KR102075296B1 (ko) * | 2019-06-14 | 2020-02-07 | 한국해양과학기술원 | 천연가스하이드레이트를 이용하여 최소평형수 선박 내 연료공급, 평형수 대체 및 청수공급이 가능한 시스템 |
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- 2012-06-18 BR BR112013032820A patent/BR112013032820A2/pt not_active IP Right Cessation
- 2012-06-18 CN CN201280032214.6A patent/CN103619700B/zh active Active
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JP2005255076A (ja) * | 2004-03-15 | 2005-09-22 | Mitsui Eng & Shipbuild Co Ltd | ガスハイドレート輸送船及び該ガスハイドレート輸送船の荷役方法 |
JP2006151147A (ja) * | 2004-11-29 | 2006-06-15 | Kawasaki Shipbuilding Corp | ガスハイドレートペレット輸送方法と輸送船 |
JP2006175345A (ja) * | 2004-12-22 | 2006-07-06 | Mitsui Eng & Shipbuild Co Ltd | ガスハイドレートをガス化槽へ供給する方法とその装置 |
JP2008126830A (ja) * | 2006-11-21 | 2008-06-05 | Chugoku Electric Power Co Inc:The | 船舶 |
JP2009174650A (ja) * | 2008-01-25 | 2009-08-06 | Chugoku Electric Power Co Inc:The | ガス供給装置及びトレーラ |
JP2009215478A (ja) * | 2008-03-12 | 2009-09-24 | Chugoku Electric Power Co Inc:The | ガスハイドレートガス化装置 |
Also Published As
Publication number | Publication date |
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CN103619700A (zh) | 2014-03-05 |
KR20130133900A (ko) | 2013-12-09 |
JP5739248B2 (ja) | 2015-06-24 |
CN103619700B (zh) | 2016-05-25 |
BR112013032820A2 (pt) | 2017-01-31 |
JP2013010412A (ja) | 2013-01-17 |
KR101590848B1 (ko) | 2016-02-18 |
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