KR20140082892A - Crane Arrangement Structure of Generator Room in Floating Facility Mounted Power Plant and Method Transporting for Component of Main Engine Using the Structure - Google Patents

Abstract

Disclosed is a crane arrangement structure of a power generating chamber of a floating offshore structure. The power generating chamber is installed in a hull. A first crane movable toward a main engine in a longitudinal direction is installed on the top of each main engine installed in the power generating chamber. A lifting beam movable toward the main engine in a width direction is installed in the power generating chamber.

Description

Technical Field [0001] The present invention relates to a crane arrangement structure of a floating-type offshore structure and a method of transporting a main engine component using the crane arrangement structure. [0002] Generally,

The present invention relates to a floating type offshore structure on which a power generation plant for generating electric power is mounted. More particularly, the present invention relates to a floating type offshore structure in which a power generation room is disposed below a hold deck of a hull, A first crane capable of moving in the longitudinal direction of the main engine is installed above each main engine and a lifting beam movable in the width direction of the main engine is installed in the power generation room. Therefore, regardless of the number of main engines, The present invention relates to a crane layout structure of a floating-type offshore structure.

Recently, the consumption of liquefied gas such as Liquefied Natural Gas (LNG) and Liquefied Petroleum Gas (LPG) has been rapidly increasing worldwide.

The liquefied gas is transported in a gaseous state through land or sea gas pipelines, or in a liquefied state and stored in a liquefied gas carrier and transported to a distant consumer.

Liquefied gas such as LNG or LPG is obtained by cooling natural gas or petroleum gas at cryogenic temperature (approximately -163 ℃ in case of LNG), and its volume is considerably reduced compared to when it is in gas state, so it is very suitable for long distance transportation through sea Do.

The liquefied gas carrier is a vessel for loading the liquefied gas into a land area by carrying liquefied gas and operating the sea. For this purpose, a storage tank (often referred to as a 'cargo window') capable of withstanding cryogenic temperatures of liquefied gas is included do.

Examples of maritime structures having storage tanks capable of storing liquefied gas at cryogenic temperatures include ships such as LNG RV (Regasification Vessel), LNG FSRU (Floating Storage and Regasification Unit), LNG FPSO (Floating, Production, Storage and off-loading), and the like.

LNG RV is a LNG regeneration facility installed on a self-propelled and floating liquefied gas carrier. The LNG FSRU stores liquefied natural gas unloaded from an LNG carrier offshore at sea and stored in a storage tank, It is the offshore structure that supplies gas to the demand of the land by vaporizing.

The LNG FPSO is a marine structure used to purify the natural gas mined in the sea, directly liquefy it, store it in the storage tank, and transfer the LNG stored in the storage tank to the LNG transport if necessary.

Since the liquefaction temperature of natural gas is a cryogenic temperature of about -163 ° C at normal pressure, LNG is evaporated even if its temperature is slightly higher than -163 ° C at normal pressure.

For example, in the case of a conventional LNG carrier, the LNG storage tank of the LNG carrier is heat-treated, but since the external heat is continuously transferred to the LNG, LNG is transported by the LNG carrier, The boil-off gas (BOG) is generated in the storage tank by continuously vaporizing in the storage tank.

Of the waste gases emitted from vessels, nitrogen oxides (NOx), sulfur oxides (SOx), and carbon dioxide (CO ₂ ) are regulated by the International Maritime Organization. Particularly, in the case of nitrogen oxide (NOx) and sulfur oxides (SOx), it was submitted through the Protocol of the Maritime Pollution Prevention Convention (MARPOL) in 1997, In May, the requirements for the fermentation were satisfied and the regulations are being implemented.

For reference, the main engine used for the ship is a 2-stroke engine (Low Speed Disel Engine), which uses HFO (heavy fuel oil), MDO (marine disel oil) and MGO (marine gas oil) It works.

That is, when the air sucked into the cylinder space by the piston driven by the cylinder is compressed to a high temperature and a high pressure and the fuel is injected very finely, the explosion occurs without a separate ignition device due to the high temperature inside. .

In addition, an ME engine (electronic control engine) has been developed as an engine used in ships. In the conventional cam drive engine, the combustion is optimized only in a designated load such as a 100% load. In the electronic control engine, the fuel injection and the exhaust valve opening / closing timing suitable for each partial load are accurately controlled by a computer program, Which is a principle that causes optimal combustion to occur.

In recent years, ME-GI engines have been developed to reduce NOx, SOx and CO2 emissions.

The ME-GI engine can be installed on marine structures such as LNG carriers, DSEC carriers, etc., which store Liquefied Natural Gas (LNG) in cryogenic storage tanks and transport them. In this case, natural gas is used as fuel, Depending on the load, a high gas supply pressure of about 150 - 300 bar (absolute pressure) is required.

Fig. 1 schematically shows a barge 1 on which a power plant is mounted. The fuel tank 13 is mounted on the hull 11 of the barge and various facilities 20 of the power generation plant are mounted on the upper portion of the cargo hold deck D of the barge 1. [

Thus, when a power plant is installed in a floating structure such as a barge, there is a risk that the power generation and transmission facilities may cause a cause of fire by spark, short-circuit, short-circuit, etc. Therefore, A safeguard to prevent it will be installed.

Furthermore, the floating marine structures drilling, producing, refining and storing crude oil or gas such as LNG FPSO are marine structures dealing with explosive gases, so that the risk of fire and explosion of marine structures is further increased due to the leakage of explosive gas. And other safety equipment.

In this way, floating structure for handling explosive gas or material requires various additional equipment to prevent explosion. Thus, the upper part of the floating floating structure is provided with various facilities of power plant, various safety As the equipment is added, there may be insufficient space or work space to install the other equipment.

In addition, a plurality of main engines are installed in the power generation chamber. In order to solve such a problem, it is possible to expect a problem that a large amount of time and manpower are consumed in the operation time because the operation is complicated in disassembling and repairing engine parts of the main engine The present invention is proposed.

The present invention is characterized in that a power generation room is installed in a lower portion of a cargo hold of a hull, a power generation room is disposed below a cargo hold deck of the hull, a power generation room is provided inside the hull, And a lifting beam capable of moving in the width direction of the main engine is installed in the power generation chamber, so that it is possible to perform part handling by a simple procedure regardless of the number of main engines, The present invention provides a crane layout structure of a floating-type offshore structure capable of reducing time and personnel.

In order to achieve the above-mentioned object, the present invention provides a power generating room crane arrangement structure of a floating offshore structure, in which a power generating room is installed in a hull, A first crane is installed, and a lifting beam movable in the width direction of the main engine is installed in the power generation chamber.

A guide rail is installed in the longitudinal direction of the main engine, and the first crane is movably installed along the guide rail.

An engine component landing zone is installed on one side of the main engine so that the lifting beam carries the engine component carried by the first crane or the first crane carries the engine component carried by the lifting beam.

The main engine may be an ME-GI engine.

The power generation room is disposed on one side of the inside of the hull, and a fuel tank is disposed on the other side inside the hull corresponding to the power generation room.

The power generating chamber and the fuel tank are disposed inside the hull to lower the center of gravity of the hull.

Ballast tanks are disposed at both ends of the hull.

The cargo hold deck of the power generation room is provided with at least one power transmission tower for transmitting electricity generated in the power generation room to the outside.

The fuel used for power generation in the power generation room is LNG, and the hull is provided with a vaporizer for vaporizing the LNG stored in the fuel tank and supplying it as power generation fuel to the power generation chamber.

In the main engine part transportation method using the power room crane arrangement structure of the floating structure according to the present invention, when the engine parts of the main engine are disassembled, the first crane is driven to move the main engine parts to the respective engine parts landing areas the lifting beam is driven to transport the engine component placed in the engine component landing area to a predetermined position, and then lifting the engine component to the outside through a hatch, Out.

On the other hand, when the engine component of the main engine is installed, the lifting beam is driven to carry the parts of the main engine to each engine component landing area when the engine is loaded through the hatch, The engine component placed in the engine component landing area is carried to each main engine to install the engine component.

As described above, according to the present invention, the power generation chamber for generating electricity by vaporizing the LNG stored in the fuel tank and using the vaporized gas is installed below the hold deck, and the power generation chamber is disposed below the hold deck of the hull. A first crane is installed above each main engine provided in the chamber and a lifting beam is installed in the power generating chamber so that the upper space of the hull can be utilized and the center of gravity of the hull can be lowered to maintain the hull more safely, Regardless of the number of engines, it is possible to manage parts with simple procedures, which enables quick work and saves time and personnel.

1 is a side view showing a barge on which a power generation plant is mounted
Figure 2 is a side view of a floating offshore structure according to the present invention;
3 is a side view showing a crane installation structure of a power generation room according to the present invention
4 is a plan view showing a crane installation structure of a power generation room according to the present invention.

Hereinafter, a crane layout structure of a power generation room of a floating offshore structure according to a preferred embodiment of the present invention and a method of transporting a main engine component using the crane layout structure will be described in detail with reference to the accompanying drawings.

FIG. 2 is a side view showing a floating offshore structure according to the present invention, FIG. 3 is a side view showing a crane installation structure of a power generation room according to the present invention, and FIG. 4 is a plan view showing a crane installation structure of a power generation room according to the present invention.

2 to 4, the main engine arrangement structure of the floating offshore structure according to the present invention includes a power plant for vaporizing LNG stored in the fuel tank 300 and generating power using the vaporized gas , The power generation room 110 of the power plant is installed under the cargo hold deck D to lower the center of gravity of the ship 100 '.

In the power generation room 110, a main engine 111 for electric power generation is installed. The main engine 111 has two strokes, and its weight is approximately 1300 to 2000 tons.

An alternator (generator) 113 is installed on the shaft 112 of the main engine 111. The alternator 113 has a diameter of about 15 to 18 meters and a weight of about 50 tons.

A power generation room 110 is installed in the hull 100 'and a first crane 120 movable in the longitudinal direction of the main engine is installed above each main engine 111 installed in the power generation room 110 And a lifting beam 140 movable in the width direction of the main engine is installed in the power generation room 110. A guide rail 121 is installed in the longitudinal direction of the main engine and the first crane 120 is movably installed along the guide rail 121.

The lifting beam 140 is carried by the first crane 120 or the first crane 120 is moved by the lifting beam 140 to transport the engine component carried by the lifting beam 140, An engine component landing zone 130 is provided at one side of the engine.

A hatch (H) for loading or unloading the engine components is installed on the power generation chamber (110).

The main engine 111 may use the ME-GI engine. A fuel supply system for a high-pressure natural gas injection engine is connected to the main engine 111 (refer to Patent Publication No. 10-2012-0103409), and the fuel supply system for the high-pressure natural gas injection engine uses LNG as a main raw material .

A fuel tank 300 is installed below the cargo hold deck D and a ball 400 for safety of the ship 100 'is installed at both ends of the ship 100'.

The LNG of the fuel tank 300 is consumed as fuel at the time of power generation so that when the weight of the fuel tank 300 is reduced, the ballast 400 is operated to adjust ballasting for safety of the ship 100 ' do.

The power generation chamber 110 is disposed at one side of the inside of the hull 100 'and the fuel tank 300 is disposed at the other side of the inside of the hull 100' corresponding to the power generation chamber 110.

The power generation room 110 and the fuel tank 300 are disposed inside the hull 100 'to lower the center of gravity of the hull 100' to further secure the hull 100 '.

The hull 100 'is provided with a vaporizer 101 for vaporizing the LNG stored in the fuel tank 300 and supplying it to the power generation room 110 as power generation fuel.

A power transmission tower 200 for transmitting electricity generated in the power generation room 110 to the shore can be installed on the upper portion of the cargo hold deck D.

The main engine component transporting method using the power generation room crane arrangement structure of the floating structure according to the present invention is characterized in that the power generation room 110 is installed inside the hull 100 ' (110) is provided with a lifting beam (140) that is movable in the width direction of the main engine (110), and a first crane (120) Use a room cranes arrangement.

First, when the engine component of the main engine is disassembled, when the first crane 120 is driven to transport the engine component A of the main engine 111 to each engine component landing area 130, the lifting beam 140 are driven to transport the engine component A placed in the engine component landing zone 130 to a predetermined position and then lift the engine component to the outside through the hatch H, (A).

On the other hand, when the engine component of the main engine is installed, when lifted through the hatch H, the lifting beam 140 is driven to transport the components of the main engine to each engine component landing zone 130, The first crane 120 is driven to transport the engine parts A placed in the respective engine part landing areas 130 to the respective main engines 111 to install the engine parts A. [

As described above, according to the present invention, the power generation chamber for generating electricity by vaporizing the LNG stored in the fuel tank and using the vaporized gas is installed below the hold deck, and the power generation chamber is disposed below the hold deck of the hull. A first crane is installed above each main engine provided in the chamber and a lifting beam is installed in the power generating chamber so that the upper space of the hull can be utilized and the center of gravity of the hull can be lowered to maintain the hull more safely, Regardless of the number of engines, material handling is possible with a simple procedure, which enables rapid operation and saves time and personnel.

100 ': Hull
110: power generation room
111: main engine
112: shaft
113: Alternator
120: 1st crane
130: engine component landing area
140: lifting beam
300: Fuel tank
400: Balast

Claims (11)

In a floating structure equipped with a power generation plant,
A first crane capable of moving in the longitudinal direction of the main engine is installed on each main engine installed in the power generating chamber and a lifting beam movable in the width direction of the main engine is installed in the power generating chamber, Wherein the crane arrangement structure of the power generation room of the floating offshore structure is provided. The method according to claim 1,
Wherein a guide rail is provided in the longitudinal direction of the main engine and the first crane is movably installed along the guide rail The method according to claim 1,
Characterized in that an engine component landing zone is provided on one side of the main engine so that the lifting beam carries the engine component carried by the first crane or the first crane carries the engine component carried by the lifting beam The crane layout structure of the floating room of floating structure. The method according to claim 1,
Wherein the main engine is installed with an ME-GI engine. The method according to claim 1,
Wherein the power generation room is disposed on one side of the inside of the hull and a fuel tank is disposed on the other side inside the hull in correspondence with the power generation room. The method according to claim 1,
Wherein the power generating chamber and the fuel tank are disposed inside the hull to lower the center of gravity of the hull. The method according to claim 1,
And the ballast tanks are disposed at both ends of the hull, respectively. The method according to claim 1,
Wherein at least one power transmission tower for transmitting electricity generated in the power generation room to the outside is installed in the storage room deck of the power generation room. The method according to claim 1,
Wherein the fuel used for power generation in the power generation room is LNG. 10. The method of claim 9,
Wherein the hull is provided with a vaporizer for vaporizing the LNG stored in the fuel tank and supplying the LNG as power generation fuel to the power generation chamber. Wherein the power generation room is installed in the inside of the hull and a first crane is provided in the longitudinal direction of the main engine at an upper portion of each main engine of the power generation room and a lifting beam movable in the width direction of the main engine is installed in the power generation room, A method of conveying a main engine component using an engine room crane arrangement structure of an offshore structure,
When the main engine is disassembled, the first crane is driven to transport the main engine parts to the respective engine parts landing areas. The lifting beams are driven to move the engine parts placed in the respective engine parts landing areas to predetermined And then lifting the engine component to the outside through a hatch to take out the engine component,
The lifting beam is driven to transport the components of the main engine to the respective engine component landing areas and the first crane is driven to drive the respective engine component landings Wherein the engine parts are installed in the main engine and the engine parts are installed in the main engine to install the engine parts.

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