CN113460269A - Power station module structure and method for refitting LNG old ship into LNG-FSRU ship - Google Patents
Power station module structure and method for refitting LNG old ship into LNG-FSRU ship Download PDFInfo
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- CN113460269A CN113460269A CN202110712560.XA CN202110712560A CN113460269A CN 113460269 A CN113460269 A CN 113460269A CN 202110712560 A CN202110712560 A CN 202110712560A CN 113460269 A CN113460269 A CN 113460269A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 4
- 239000000969 carrier Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 239000003949 liquefied natural gas Substances 0.000 description 39
- 238000007667 floating Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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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
- B63B83/00—Rebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems
- B63B83/20—Rebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems for conversion to a different use, e.g. for converting tankers into a FPSO-FLNG units
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a power station module structure and a method for refitting an LNG old ship into an LNG-FSRU ship. The invention solves the problem of arrangement of power station modules when the old LNG ship is converted into an LNG-FSRU ship, and not only can provide energy consumption required by the operation of a regasification system, but also can effectively reduce the vibration and noise influence of power generation equipment on the superstructure of the old LNG ship by arranging the independent power supply module on the mooring deck at the stern of the original ship.
Description
Technical Field
The invention relates to the technical field of ship refitting, in particular to a power station module structure and a method for refitting an LNG old ship into an LNG-FSRU ship.
Background
A floating regasification unit (FSRU) is an offshore floating receiving station with Liquefied Natural Gas (LNG) storage and regasification functions. After the FSRU is fixed through reliable anchoring, the FSRU receives liquefied natural gas conveyed by other LNG transport ships, gasifies the liquefied natural gas and conveys the liquefied natural gas to the shore through a pipeline. Due to the fact that the occupied area is small, the deployment is flexible, requirements for peripheral port infrastructure are low, and FSRUs are selected as LNG receiving terminals in more and more small emerging markets. In general, a newly built FSRU generally requires a construction period of more than 3 years and requires a large capital investment, whereas the conversion of an old LNG ship into an FSRU requires only 6 months and the construction cost is only half of that of the newly built FSRU. Therefore, part of the shippers began to choose to convert older LNG carriers to LNG-FSRU vessels.
The method for changing the LNG transport ship into the FSRU generally needs to add a plurality of chains of regasification systems and natural gas output systems in the middle of the ship body or on a bow deck, and because the power of a generator set of the original LNG transport ship is insufficient, enough electric energy cannot be provided for the regasification system to meet the energy consumption requirement of the operation of the regasification system. Meanwhile, the space of the engine room shed of the original LNG transport ship is small, the engine room shed is limited by the space of the ship body, and an extra generator set cannot be additionally arranged in the engine room of the original equipment, so that the refitting work of the old LNG transport ship is a great problem.
Disclosure of Invention
In view of the above, the present invention provides a power station module structure and method for converting an LNG ship into an LNG-FSRU ship, so as to solve the above problems in the background art.
A power station module structure for converting an LNG old ship into an LNG-FSRU ship is arranged in the stern area of the LNG old ship and is connected with a cabin shed of the LNG old ship through a connecting structure.
The power station modular structure comprises a supporting upright post fixed on a mooring deck behind a cabin shed of the LNG old ship, a deck structure arranged on the supporting upright post and enclosure wall structures used for supporting the deck structure and isolating different cabin spaces, wherein independent power supply modules and control modules used for supplying power to the regasification device are installed in the different cabin spaces isolated by the enclosure wall structures, and the regasification device is arranged on a deck of a cargo hold area of the LNG old ship.
Preferably, the deck structure comprises a bottom deck arranged at the top of the support column and a multi-layer internal deck arranged above the bottom deck, the upper deck and the lower deck are connected through a surrounding wall structure, the power supply module is arranged in a cabin space on the bottom deck, and the control module is arranged in the cabin space on the internal deck.
Preferably, the height of the sub deck from the mooring deck exceeds 2.5 m.
Preferably, the enclosure wall structure comprises a peripheral wall surrounding the deck structure and an inner peripheral wall arranged inside the peripheral wall, and the peripheral wall and the inner peripheral wall are both composed of an enclosure wall plate and a plurality of equally-distributed profiles vertically fixed on the enclosure wall plate.
Preferably, support columns are arranged below the power supply module and above the strong structure of the mooring deck.
Preferably, the support column is made of I-shaped steel or cylindrical steel.
Preferably, the power supply module comprises a generator set and a ventilation system.
Preferably, the connecting structure is a box-shaped structure consisting of a steel plate and aggregates fixed on the steel plate.
A method for converting an old LNG ship into an LNG-FSRU ship specifically comprises the following steps:
s1, arranging a supporting upright post on a mooring deck behind a cabin shed of the LNG old ship;
s2, mounting a deck structure on the support upright posts, wherein each layer of deck in the deck structure is supported by a surrounding wall structure, and the surrounding wall structure divides the space in the deck structure into a plurality of different cabin spaces;
the deck structure consists of a bottom deck arranged at the top of the supporting upright post and a plurality of layers of internal decks arranged above the bottom deck;
s3, connecting the upper part of the enclosure wall structure with the cabin shed of the LNG old ship through a connecting structure;
s4, installing an independent power supply module in the cabin space on the bottom deck and installing a control module in the cabin space on the inner deck;
and S5, connecting the power supply module with a regasification device arranged on a deck of a cargo hold area of the LNG old ship.
The invention has the beneficial effects that:
1. the power station module is simple in structure, safe and reliable, the problem that the power station module is difficult to arrange when an old LNG ship is converted into an LNG-FSRU (floating LNG storage and regasification ship) is solved, and the independent power supply module is arranged on the mooring deck at the stern of the original ship, so that the power consumption required by the operation of the regasification system can be provided, and the vibration and noise influence of power generation equipment on the superstructure of the old LNG ship can be effectively reduced.
2. The independent power supply module adopts the support upright column to be connected with the hull structure, thereby avoiding the displacement and modification of the original mooring equipment on the tail deck, and flexibly setting the position and the number of the support columns according to the actual arrangement condition of the mooring equipment on the original stern deck.
3. A connecting structure is designed between the power station module and the cabin shed of the original ship, so that the structural rigidity of the power station module can be increased, the inherent frequency of the power station module structure is improved, and the resonance with the propeller exciting force frequency is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic side view of the general arrangement of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a sectional view taken along line a in fig. 2.
The reference numerals in the figures have the meaning:
1, a surrounding wall structure, 11 surrounding walls, 12 surrounding walls, 111 profiles and 112 steel plates;
2 deck structure, 21 inner deck, 22 bottom deck;
3 supporting columns, 4 connecting structures, 5 original ship cabin sheds, 6 original ship superstructure, 7 original ship cabin areas, 8 original ship stern areas, 81 original ship mooring decks and 9 original ship cargo hold areas.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
The invention provides a power station module structure for refitting an LNG old ship into an LNG-FSRU ship, wherein the power station module structure is arranged in a stern area 8 of the LNG old ship and is connected with a cabin 5 of the LNG old ship through a connecting structure 4.
The power station module structure comprises a supporting upright post 3 fixed on a mooring deck 81 positioned behind an LNG old ship cabin shed 5, a deck structure 2 arranged on the supporting upright post 3, and a surrounding wall structure 1 used for supporting the deck structure and isolating different cabin spaces. And independent power supply modules and control modules for supplying power to the regasification device are arranged in different cabin spaces separated by the enclosure wall structure 1, and the regasification device is arranged on a deck of a cargo hold area 9 of the LNG old ship.
The power station module structure is arranged behind the LNG old ship cabin shed 5, so that the interference of noise of equipment such as a generator in the power station module to inhabitants in an original ship superstructure 6 can be reduced, and the operating sight of a crew in a cab of the superstructure can not be influenced.
Meanwhile, the deck structure 2 is arranged above the mooring deck 81, and a certain height interval is kept between the deck structure and the mooring deck 81, so that normal work of various mooring equipment on the mooring deck 81 can be guaranteed, and a passing space with enough height for personnel on the mooring deck 81 to obtain materials can be guaranteed. In this embodiment, the height of the bottom deck 22 from the mooring deck 81 exceeds 2.5 m.
In particular, the deck structure 2 is composed of a lower deck 22 arranged on top of the support columns 3, a multi-layered inner deck 21 arranged above the lower deck 22. The upper and lower decks are connected by means of enclosure wall structures 1, the power supply modules being arranged in the cabin space on the bottom deck 22 and the control modules being arranged in the cabin space on the inner deck 21. When the power supply module is installed, the deck structure at the installation position of the power supply module is reinforced.
Preferably, the support columns 3 are arranged below the power supply module and above the strong structure of the mooring deck 81, so that the arrangement can ensure that the support columns 3 can effectively support the whole power station module structure, and meanwhile, the support columns 3 are prevented from interfering with the trend of the existing mooring equipment and mooring ropes.
In order to facilitate the load transfer, a reinforcing diagonal brace may be installed at the root of each support column 3.
In this embodiment, the support columns 3 are made of i-steel or cylindrical steel. The power supply module comprises a generator set and a ventilation system.
The layers in the deck structure 2 are connected by enclosure wall structures 1 and the enclosure wall structures 1 divide the space in the deck structure 2 into a plurality of different cabin spaces.
The enclosure wall structure 1 comprises an outer enclosure wall 12 surrounding the deck structure 2 and an inner enclosure wall 11 arranged inside the outer enclosure wall 12, wherein the outer enclosure wall 12 and the inner enclosure wall 11 are composed of enclosure wall plates and a plurality of equidistantly distributed profiles vertically fixed on the enclosure wall plates. The through holes can be formed in the upper part of the enclosure wall plate according to equipment installed in the space, so that ventilation and heat dissipation, equipment entering and exiting and the like are facilitated, and corresponding structural reinforcement and sound insulation treatment are needed to be carried out on the perforated parts. For the space with higher requirements on sound insulation and fire prevention, sound insulation or fire prevention insulating materials need to be laid on the wall enclosing plate.
The power station module structure is connected with an LNG old ship cabin shed 5 through a connecting structure 4, and the connecting structure 4 is a box-shaped structure formed by steel plates and aggregates fixed on the steel plates. The connecting structure 4 can increase the structural rigidity of the power station module structure, thereby improving the natural frequency of the power station module structure and avoiding the resonance between the power station module structure and the propeller exciting force frequency.
The method for refitting the old LNG ship into the LNG-FSRU ship comprises the following steps:
and S1, arranging the supporting upright posts 3 on the mooring deck 81 behind the LNG old ship cabin shed 5.
S2, the deck structures 2 are installed on the supporting columns 3, and the decks in the deck structures 2 are supported by the enclosure wall structures 1.
And S3, connecting the upper part of the enclosure wall structure 1 with the LNG old ship shed 5 through the connecting structure 4.
S4, the independent power supply module is installed in the cabin space on the bottom deck 22 and the control module is installed in the cabin space on the inner deck 21.
S5, connecting the power supply module to a regasification facility disposed on the deck of the cargo hold area 9 of the old LNG carrier.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A power station module structure for refitting an LNG old ship into an LNG-FSRU ship is characterized in that the power station module structure is arranged in the stern area of the LNG old ship and is connected with a cabin shed of the LNG old ship through a connecting structure,
the power station modular structure comprises a supporting upright post fixed on a mooring deck behind a cabin shed of the LNG old ship, a deck structure arranged on the supporting upright post and enclosure wall structures used for supporting the deck structure and isolating different cabin spaces, wherein independent power supply modules and control modules used for supplying power to the regasification device are installed in the different cabin spaces isolated by the enclosure wall structures, and the regasification device is arranged on a deck of a cargo hold area of the LNG old ship.
2. A power plant module structure for conversion of old LNG ships into LNG-FSRU ships according to claim 1, wherein the deck structure is composed of a lower deck placed on top of the supporting columns, a multi-layered inner deck placed above the lower deck, the upper and lower decks being connected by means of a trunk wall structure, the power supply module being placed in the cabin space on the lower deck, and the control module being placed in the cabin space on the inner deck.
3. A plant module structure for conversion of old LNG ships into LNG-FSRU ships according to claim 2, characterized in that the height of the sub-deck from the mooring deck exceeds 2.5 m.
4. A power station module structure for conversion of an LNG ship into an LNG-FSRU ship, according to claim 1 or 2, characterized in that the enclosure wall structure comprises a peripheral wall surrounding the deck structure, an inner wall arranged inside the peripheral wall, both the peripheral wall and the inner wall being composed of a wall plate, a number of equally spaced profiles fixed vertically to the wall plate.
5. A power plant module structure for conversion of LNG carriers to LNG-FSRU vessels according to claim 1, characterized in that support columns are provided below the power supply modules and above the strong structure of the mooring deck.
6. A power station module structure for conversion of old LNG ships into LNG-FSRU ships according to claim 5, characterized in that the supporting columns are made of I-steel or cylindrical steel.
7. A power plant module structure for conversion of LNG carriers to LNG-FSRU vessels in accordance with claim 1, wherein the power supply module comprises a generator set and a ventilation system.
8. A power station module structure for conversion of an LNG ship into an LNG-FSRU ship in accordance with claim 1, wherein the connection structure is a box-type structure composed of a steel plate and an aggregate fixed to the steel plate.
9. A method for converting an old LNG ship into an LNG-FSRU ship is characterized by comprising the following steps:
s1, arranging a supporting upright post on a mooring deck behind a cabin shed of the LNG old ship;
s2, mounting a deck structure on the support upright posts, wherein each layer of deck in the deck structure is supported by a surrounding wall structure, and the surrounding wall structure divides the space in the deck structure into a plurality of different cabin spaces;
the deck structure consists of a bottom deck arranged at the top of the supporting upright post and a plurality of layers of internal decks arranged above the bottom deck;
s3, connecting the upper part of the enclosure wall structure with the cabin shed of the LNG old ship through a connecting structure;
s4, installing an independent power supply module in the cabin space on the bottom deck and installing a control module in the cabin space on the inner deck;
and S5, connecting the power supply module with a regasification device arranged on a deck of a cargo hold area of the LNG old ship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110712560.XA CN113460269A (en) | 2021-06-25 | 2021-06-25 | Power station module structure and method for refitting LNG old ship into LNG-FSRU ship |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110712560.XA CN113460269A (en) | 2021-06-25 | 2021-06-25 | Power station module structure and method for refitting LNG old ship into LNG-FSRU ship |
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| CN113460269A true CN113460269A (en) | 2021-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118182769A (en) * | 2024-05-20 | 2024-06-14 | 中海油能源发展股份有限公司采油服务分公司 | Construction method for modifying FPSO (floating production storage and offloading) into FSRU (FSRU) |
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| CN112078758A (en) * | 2020-08-03 | 2020-12-15 | 沪东中华造船(集团)有限公司 | Method for converting LNG ship into FSRU |
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2021
- 2021-06-25 CN CN202110712560.XA patent/CN113460269A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1930932A (en) * | 2004-03-04 | 2007-03-14 | 单浮筒系泊公司 | Floating power generation system |
| JP2012086768A (en) * | 2010-10-22 | 2012-05-10 | Mitsubishi Heavy Ind Ltd | Method for manufacturing floating type structure equipped with liquefied natural gas tank |
| WO2015152825A1 (en) * | 2014-04-03 | 2015-10-08 | Keppel Offshore & Marine Technology Centre Pte Ltd | Method of integrating new built structural block and sponson with existing lng carrier |
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| CN118182769A (en) * | 2024-05-20 | 2024-06-14 | 中海油能源发展股份有限公司采油服务分公司 | Construction method for modifying FPSO (floating production storage and offloading) into FSRU (FSRU) |
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Application publication date: 20211001 |