KR102408231B1 - Arrangement structure of cargo handling system and floating marine structure having the same - Google Patents

Abstract

The present invention relates to an arrangement structure of a cargo handling system for a floating offshore structure comprising a cargo area provided with a plurality of cargo tanks for storing liquefied gas cargo such as LNG and a machine room area for accommodating an engine room provided with an engine, the A first facility unit for processing the boil-off gas generated due to the vaporization of the liquefied gas cargo stored in the cargo tank or for supplying the liquefied gas cargo as the fuel of the engine; and a second facility unit capable of regasifying the liquefied gas cargo stored in the cargo tank, wherein the first facility unit is disposed in a cargo handling equipment room provided in an upper portion of the engine room, and the second facility unit is the cargo handling equipment room It is arranged in the regasification equipment area located on the upper part of the, the cargo handling equipment room and the regasification equipment area are integrally manufactured and mounted on the hull.

Description

A cargo handling system arrangement structure and a floating offshore structure having the arrangement structure

The present invention relates to a cargo handling system for a floating offshore structure, and more particularly, to a cargo handling system that can dramatically reduce the manufacturing cost of the floating offshore structure and the installation and mounting cost of liquefied gas cargo handling equipment. It relates to an arrangement structure and a floating offshore structure having the arrangement structure.

Natural gas is spotlighted in that it is environmentally friendly because it generates less nitrogen oxides or sulfur oxides compared to oil.

Liquefied natural gas is obtained by cooling natural gas to a cryogenic temperature of about -163°C at atmospheric pressure, and its volume is reduced to about 1/600 compared to that of natural gas in gaseous state, so it is very suitable for long-distance transportation by sea.

In general, natural gas is made in a cryogenic liquefied natural gas (LNG) state at a production site, and then mounted on a liquefied natural gas carrier (LNGC; LNG Carrier) can be transported over a long distance.

Liquefied natural gas transported by LNG carriers is an LNG Floating Storage Unit (FSU), an LNG Floating Storage and Regasification Unit (FSRU), and an LNG Regasification Vessel (RV). Vessel), and it can be unloaded from demand destinations such as land terminals.

Here, a floating storage and regasification unit (LNG FSRU), such as an LNG floating storage unit (LNG FSU) having a large-scale reliquefaction facility and a regasification facility for regasification of liquefied natural gas (LNG) In order to implement the relevant cargo handling function, additional cargo handling equipment needs to be installed, and there are many cargo handling equipment compared to liquefied natural gas carriers. .

The above-described technical configuration is a background for helping understanding of the present invention, and does not mean a conventional technique widely known in the technical field to which the present invention pertains.

Republic of Korea Patent Publication No. 10-1742289

Figure 1 is a view schematically showing the stern-side hull structure of the conventional floating offshore structure, Figure 2 is a view showing the bow-side hull structure of the conventional floating offshore structure in side and plane.

1, in the conventional floating offshore structure, a cargo area 10 in which a plurality of cargo tanks 11 for storing liquefied gas cargo such as LNG in the central part of the hull (H) are provided and , provided in the stern of the hull (H) and includes a machine room area (Machinery space) (20) for accommodating the engine room (ER) in which the engine is provided.

The cargo area 10, as shown in FIGS. 1 to 2, is provided with a trunk space 15 between the cargo tank 11 and the trunk deck 13, such a trunk The space 15 is divided into a plurality of compartments by a cofferdam 17 provided between the cargo tanks 11, so that when a fire occurs in the trunk deck 13, the cargo tank 11 and the trunk deck 13 To protect the liquefied gas cargo accommodated in the cargo tank 11 by isolating, a plurality of ballast tanks (Ballast tank) 19 are provided on the port side and starboard side of each cargo tank 11.

The machine room area 20 is provided inside the stern side hull H of the cargo area 10 to accommodate the engine room 21, and various devices such as an engine driven by receiving liquefied gas cargo as fuel are installed, In the upper part of the engine room 21, an accommodation area (A) for the residence of the crew is formed.

Conventional floating offshore structures are used for general liquefied gas cargo processing such as BOG (Boil-off Gas) treatment or fuel supply to an engine generated due to the vaporization of liquefied gas cargo or upper and lower cargoes of liquefied gas cargo. A separate cargo handling equipment room 30 is provided for the installation of various required handling equipment.

The cargo handling equipment room 30 includes a compressor room (Cargo Compressor Room) provided with a compressor for compressing boil-off gas, and an electric motor room (Electric Motor Room) in which a motor for driving the compressor is installed by being partitioned from the compressor room. can

Here, the conventional cargo handling equipment room 30 is installed adjacent to the machine room area 20 on the upper part of the cargo area 10 , that is, on the trunk deck 13 , as shown in FIG. 1 .

Meanwhile, as described above, floating offshore structures such as LNG Floating Storage Units (LNG FSUs) and LNG Floating Storage and Regasification Units (LNG FSRUs) are generally liquefied gas carriers (LNGCs) or LNG regasification vessels (LNG RVs). ), the installation of additional cargo handling equipment due to large-scale reliquefaction and/or regasification facilities is required.

For this reason, conventionally, the existing cargo handling equipment room 30 provided on the trunk deck 13 is expanded or, as shown in FIG. 2 , a new equipment area 40 for installing additional cargo handling equipment in the bow area is provided. to form

The new equipment area 40 is formed on the bow side of the hull (H), and a high-pressure pump (HP Pump) and a high-pressure vaporizer (HP Vaporizer) required to regasify the liquefied gas cargo may be disposed.

Inside the bow side hull (H), the regasification switch board room (Regas Switch Board Room) 50 for supplying or controlling power to equipment for regasification of liquefied gas cargo and heating the regasified liquefied gas cargo A bow pump room 70 provided with a pump for supplying seawater used for regasification of a regasification heater room 60, and a liquefied gas cargo is further formed. have.

However, as the cargo handling equipment room 30 is expanded and a new equipment area 40 is additionally formed in the bow area, the quantity of various pipes, cables and support members disposed from the machine room area 20 to the bow area increases. , resulting in a huge cost increase in the production, installation, and maintenance of floating offshore structures.

The present invention provides space utilization of floating offshore structures and installation and loading of cargo handling equipment through relocation of a cargo handling equipment room in which various cargo handling equipment for cargo handling of liquefied gas is disposed and a new equipment area for reliquefaction or regasification An object of the present invention is to provide an arrangement structure of a cargo handling system capable of dramatically reducing the time and cost required for the process, and a floating offshore structure having the arrangement structure.

According to an aspect of the present invention, a cargo handling system arrangement structure of a floating offshore structure including a machine room area accommodating an engine room provided with a cargo area provided with a plurality of cargo tanks for storing liquefied gas cargo such as LNG and an engine As, a first facility for processing the boil-off gas generated due to the vaporization of the liquefied gas cargo stored in the cargo tank or supplying the liquefied gas cargo as the fuel of the engine; and a second facility unit capable of regasifying the liquefied gas cargo stored in the cargo tank, wherein the first facility unit is disposed in a cargo handling equipment room provided in an upper portion of the engine room, and the second facility unit is the cargo handling equipment room Doedoe arranged in the regasification equipment area located on the upper part of the cargo handling equipment room and the regasification equipment area is integrally manufactured and mounted on the hull of the cargo handling system arrangement structure can be provided.

The cargo handling equipment room may include: a compressor room in which a BOG compressor for compressing BOG provided above the engine room and a heater for heating the liquefied gas cargo supplied to the BOG compressor are installed; and an electric motor room which is partitioned from the compressor room and in which a motor for driving the BOG compressor is installed.

In addition, the first equipment unit, BOG compressor for compressing BOG; a heater for heating the boil-off gas supplied to the boil-off gas compressor; and a motor for driving the boil-off gas compressor.

In addition, the second equipment unit, a high-pressure pump for boosting the liquefied gas cargo to a high pressure; a high-pressure vaporizer for vaporizing the liquefied gas cargo pressurized by the high-pressure pump; And it may include a suction drum combined with a recondenser for receiving the boil-off gas from the cargo tank, temporarily storing and re-condensing and supplying the boil-off gas to the high-pressure pump again.

According to another aspect of the present invention, a cargo area equipped with a plurality of cargo tanks for storing liquefied gas cargo such as LNG; a machine room area accommodating an engine room in which an engine is provided at the aft side of the cargo area; a cargo handling equipment room formed in the upper part of the machine room area and disposed with a first facility for processing boil-off gas generated due to vaporization of the liquefied gas cargo stored in the cargo tank or for supplying the liquefied gas cargo as a fuel of the engine; and a regasification equipment area in which a second equipment unit capable of regasifying the liquefied gas cargo stored in the cargo tank is disposed, wherein the cargo handling equipment room and the regasification equipment area are integrally manufactured and mounted on the hull. Offshore structures may be provided.

The floating offshore structure may be any one of an LNG floating storage device, an LNG floating storage and regasification device, or an LNG regasification vessel.

The present invention provides a cargo handling equipment room in which a first facility for processing boil-off gas generated due to vaporization of liquefied gas cargo or supplying liquefied gas cargo as fuel of an engine is disposed, and a second capable of regasifying liquefied gas cargo By relocating the regasification equipment area where the equipment is arranged to the upper part of the machine room area, the amount of various pipes, cables, and support members arranged between the cargo handling equipment room and the regasification equipment area in the stern side machine room area of the hull is dramatically reduced can do it

In addition, by rearranging the cargo handling equipment room and regasification equipment area, as well as integrating the cargo handling equipment room and regasification equipment area and mounting them on the hull, it is required in the process of manufacturing floating offshore structures or installing and loading cargo handling equipment. It can have the effect of reducing the time and cost to be installed.

In addition, by locating the regasification equipment area in the upper part of the cargo handling equipment room, it can have an advantageous effect on space utilization of the floating offshore structure.

1 is a view schematically showing the stern-side hull structure of a conventional floating offshore structure.
Figure 2 is a view showing the hull structure of the bow side of the conventional floating offshore structure in side and plane.
Figure 3 is a view schematically showing the stern-side hull structure of the floating offshore structure according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in adding reference numerals to the components of each drawing, the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, preferred embodiments of the present invention will be described below, but the technical spirit of the present invention is not limited thereto and may be variously implemented by those skilled in the art without being limited thereto.

In the present specification, the floating offshore structure may be a floating offshore structure equipped with an engine fueled by a liquefied gas cargo such as liquefied natural gas (LNG), and an LNG floating storage device (LNG FSU) having a large-scale reliquefaction facility. ), an LNG Floating Storage and Regasification Unit (LNG FSRU) having a regasification facility, or an LNG Regasification Vessel (LNG RV).

Figure 3 is a view schematically showing the stern-side hull structure of the floating offshore structure according to an embodiment of the present invention.

Referring to Figure 3, the floating offshore structure 100 according to an embodiment of the present invention, the hull 101 is composed of a double bulkhead structure consisting of an outer plate and an inner plate, a plurality of storing liquefied gas cargo such as LNG It may include a cargo area 110 provided with a cargo tank 111 and a machine room area 120 accommodating an engine room ER provided with an engine.

The cargo area 110 is disposed adjacent to the bow side of the machine room area 120 to be described later, and a plurality of cargo tanks 111 may be provided in parallel along the longitudinal direction of the floating offshore structure 100 . .

The cargo tank 111 is provided with an insulating material for storing the liquefied gas cargo in a cryogenic state, and the cargo tank 111 is a membrane type depending on whether the load of the cargo directly acts on the insulation material, or Independent tank type may be applied.

The cargo area 110, as shown in FIG. 3, a trunk space 115 is provided between the cargo tank 111 and the trunk deck 113, and this trunk space 15 is a plurality of The cargo tank is divided into a plurality of compartments by a cofferdam 117 provided between the cargo tanks 111 and isolates the cargo tank 111 and the trunk deck 113 when a fire occurs in the trunk deck 113. It is possible to protect the liquefied gas cargo accommodated in (111).

In addition, a plurality of ballast tanks (Ballast tank) may be further provided on the port side and the starboard side of each of the cargo tanks 111 .

The machine room area 120 is provided inside the stern side hull 101 of the cargo area 110 to accommodate the engine room (ER), and various devices such as an engine (not shown) driven by receiving liquefied gas cargo as fuel. can be installed.

In the upper part of the engine room 21, that is, the upper part of the machine room area 120, a cabin area for the residence of crew members may be further formed.

The floating offshore structure 100 according to an embodiment of the present invention may further include a liquefied gas cargo handling system for processing the liquefied gas cargo stored in the cargo tank 111 .

The cargo handling system includes a first facility unit (not shown) for processing boil-off gas generated due to vaporization of the liquefied gas cargo stored in the cargo tank 111 or supplying the liquefied gas cargo as fuel of the engine, and the cargo tank 111 ) may include a second facility unit (not shown) that can regasify the liquefied gas cargo stored in the.

Here, the first equipment unit is disposed in the cargo handling equipment room 130 provided above the engine room (ER) or adjacent to the engine room (ER), and the second equipment unit is located in the upper part of the cargo handling equipment room 130 . It may be disposed in the fire equipment area 140 .

That is, the floating offshore structure 100 according to an embodiment of the present invention is a regasification equipment in which the cargo processing equipment room 130 in which the first facility is disposed, and the second facility capable of regasifying the liquefied gas cargo are disposed. Various piping, cables, and supports disposed between the cargo handling equipment room 130 and the regasification equipment section 140 in the stern side machine room section 120 of the hull by relocating the section 140 to the upper part of the machine room section 120 . It is possible to dramatically reduce the amount of materials such as materials.

The first equipment unit may include a BOG compressor for compressing BOG, a heater for heating BOG supplied to the BOG compressor, and a motor for driving the BOG compressor.

In the present embodiment, the cargo handling equipment room 130 includes a compressor for compressing BOG and a compressor room 131 in which a heater for heating BOG supplied to the BOG compressor is disposed, and a BOG compressor. It may include an electric motor room (Electric motor room) 133 in which a motor for driving is disposed.

The electric motor room 133 is provided adjacent to the compressor room 131 in the upper part of the machine room area 120, and caused by sparks when the compressor is driven in the compressor room 131 classified as a hazardous zone. There is a risk of explosion, and in order to protect the electric motor room 133 classified as a safety zone from the risk of explosion, the compressor room 131 and the electric motor room 133 are divided into separate rooms. may be desirable.

The second facility unit is to regasify the liquefied gas cargo stored in the cargo tank 111, and a high-pressure pump (HP pump) for boosting the liquefied gas cargo to a high pressure, and vaporizing the liquefied gas cargo pressurized by the high-pressure pump It may include a high-pressure vaporizer (HP vaporizer), and a recondenser combined suction drum (Recondnesor/Suction drum) for re-condensing by receiving the boil-off gas from the cargo tank 111 .

The suction drum combined with the recondenser receives the boil-off gas and liquefied gas cargo generated from the cargo tank 111, temporarily stores it, supplies the stored liquefied gas cargo back to the high-pressure pump, and exchanges heat between the boil-off gas and the liquefied gas cargo to heat-exchange the liquefied gas It can perform the role of condensing the boil-off gas by the cryogenic cooling heat of the cargo.

In this embodiment, the cargo handling equipment room 130 in which the first facility is disposed and the regasification equipment area 140 in which the second facility is disposed may be manufactured as one module through integration, and may be a previously built ship or It may be possible to mount it on a floating offshore structure under construction at once.

The present invention provides a cargo handling equipment room in which a first facility for processing boil-off gas generated due to vaporization of liquefied gas cargo or supplying liquefied gas cargo as fuel of an engine is disposed, and a second capable of regasifying liquefied gas cargo By relocating the regasification equipment area where the equipment is arranged to the upper part of the machine room area, the amount of various pipes, cables, and support members arranged between the cargo handling equipment room and the regasification equipment area in the stern side machine room area of the hull is dramatically reduced can do it

In addition, by rearranging the cargo handling equipment room and regasification equipment area, as well as integrating the cargo handling equipment room and regasification equipment area and mounting them on the hull, it is required in the process of manufacturing floating offshore structures or installing and loading cargo handling equipment. It can have the effect of reducing the time and cost to be installed.

In addition, by locating the regasification equipment area in the upper part of the cargo handling equipment room, it can have an advantageous effect on space utilization of the floating offshore structure.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions are possible within the range that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explaining, not limiting, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: floating offshore structure
101: Hull
110: cargo area
111: Cargo tank
113: trunk deck
115: trunk space
117: Cofferdam
120: Machinery space
130: cargo handling equipment room
131: Cargo compressor room
133: Electric motor room
140: regasification equipment area
ER: engine room

Claims (6)

a cargo area provided with a plurality of cargo tanks for storing liquefied gas cargo;
a machine room area accommodating an engine room in which an engine is provided at the aft side of the cargo area;
a cargo handling equipment room in which a first facility for processing boil-off gas generated due to vaporization of the liquefied gas cargo stored in the cargo tank or for supplying the liquefied gas cargo as a fuel of the engine is disposed; and
Containing a regasification equipment area in which a second facility that can regasify the liquefied gas cargo stored in the cargo tank is disposed,
The regasification equipment section is located above the cargo handling equipment room,
The cargo handling equipment room and the regasification equipment area is a floating offshore structure disposed above the machine room area provided on the stern side of the cargo area rather than the trunk deck above the cargo area. The method of claim 1,
The cargo handling equipment room,
a compressor room in which a BOG compressor for compressing BOG and a heater for heating the liquefied gas cargo supplied to the BOG compressor are installed; and
Floating offshore structure comprising an electric motor room partitioned from the compressor room and installed with a motor for driving the boil-off gas compressor. The method of claim 1,
The first equipment unit,
BOG compressor for compressing BOG;
a heater for heating the boil-off gas supplied to the boil-off gas compressor; and
Floating offshore structure including a motor for driving the boil-off gas compressor. The method of claim 1,
The second equipment unit,
a high-pressure pump for boosting the liquefied gas cargo to a high pressure;
a high-pressure vaporizer for vaporizing the liquefied gas cargo pressurized by the high-pressure pump; and
Floating offshore structure comprising a recondenser combined suction drum for receiving boil-off gas from the cargo tank, temporarily storing and re-condensing, and supplying the boil-off gas to the high-pressure pump again. The method of claim 1,
The cargo handling equipment room and the regasification equipment area are manufactured as one integrated module and are mounted on the hull of a floating offshore structure. The method of claim 1,
The floating offshore structure is any one of an LNG floating storage device, an LNG floating storage and regasification device, or an LNG regasification vessel.

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