WO2015178658A1 - Layout structure of floating storage gas power plant - Google Patents

Abstract

The present invention relates to a layout structure of a floating storage gas power plant and, more specifically, to a layout structure of a floating storage gas power plant, comprising: a cargo system for storing liquefied natural gas in a floating structure and loading and unloading the liquefied natural gas; a fuel gas supply system provided in the floating structure in order to vaporize the liquefied natural gas of the cargo system into fuel gas and supply the fuel gas; a gas turbine power generation system including a gas power generation unit operated by the fuel gas supplied from the fuel gas supply system, and a first power generator for producing electric power by means of the gas power generation unit; a heat recovery steam generator (HRSG) for generating steam by using waste heat of exhaust gas generated from the gas power generation unit; and a steam turbine power generation system including a steam turbine operated by the steam supplied from the HRSG, and a second power generator for producing the electric power by means of the steam turbine, wherein the fuel gas supply system is disposed at the stern. According to the present invention, the floating storage gas power plant is divided into a safety zone in which a residential section is placed, and a danger zone in which the fuel gas supply system, the gas turbine power generation system, the HRSG and the steam turbine power generation system are arranged, thereby minimizing the risk of a fire or explosion.

Description

Arrangement Structure of Floating Storage Gas Power Plant

The present invention is a floating storage gas power plant that can generate power by using the waste heat of the liquefied natural gas and gas turbine while storing the liquefied natural gas at sea, the floating storage gas power generation that can minimize the risk of fire or explosion It relates to the arrangement of the plant.

Recently, as the demand for environmentally friendly power generation, interest in power generation using natural gas has increased.

There is a growing interest in gas power generation in emerging economies with poor power supply. However, gas power generation is limited because development is possible only when gas infrastructure such as gas storage is installed on land.

Onshore thermal power plant has a problem that the initial installation cost of the facility increases because the volume is too large, there is a problem that the consumption of buildings, piping, materials increases as the facilities and systems are independently located in a separate building.

In addition, in the conventional onshore thermal power plant, there is always a risk (risk) as the installation and tank arrangement, and the test is carried out on site (site), there is a problem that requires a long construction period.

In particular, in the case of Southeast Asian countries consisting of several islands, it was difficult to generate a large amount of gas.

That is, there is a disadvantage in that it takes place to secure the place and the construction cost according to the construction of the thermal power plant on the land, and it is difficult to perform the power supply in a short time because the construction of the thermal power plant on the land takes a lot of time.

In order to solve this problem, a floating offshore gas storage regasification facility line called Floating Storage Re-gasfication Unit (FSRU) has emerged. Was done.

However, such land-based development using FSRUs creates a double burden of installing FSRUs at sea and building power plants on land.

That is, as well as the FSRU, there is a disadvantage that brings the place secured by the construction of the land plant and the cost of construction.

Therefore, in addition to the above-mentioned method, a new and advanced type of floating and storage power plant (FSPP) capable of generating liquefied natural gas at sea and generating electricity by using the waste heat of the liquefied natural gas and gas turbine is provided. Korea's technology development continues.

However, the floating storage gas power plant does not distinguish between high-risk equipments on the deck, the gas supply facilities and electricity supply facilities are simply arranged there is a high risk of fire or explosion.

The present invention is to provide an arrangement structure of a floating storage gas power plant that can minimize the fire or explosion.

Accordingly, the present invention provides a preferred embodiment, the cargo system for storing the liquefied natural gas in the floating structure, loading and offloading the liquefied natural gas; A fuel gas supply system installed in the floating structure to vaporize and supply liquefied natural gas of the cargo system to fuel gas; A gas turbine power generation system including a gas power generation unit operating with fuel gas supplied from the fuel gas supply system, and a first generator for generating power by the gas power generation unit; A waste heat recovery steam generator (HRSG) for generating steam by using waste heat of exhaust gas generated from the gas power generating unit; And a steam turbine operating system having a steam turbine operated by steam supplied from the waste heat recovery steam generator, and a second generator for generating electric power by the steam turbine; wherein the fuel gas supply system is disposed at the stern. It provides an arrangement structure of a floating storage gas power plant, characterized in that.

The fuel gas supply system according to the embodiment may be disposed above the stern side deck.

Fuel gas supply system according to the embodiment may be disposed below the stern side deck.

The arrangement of the floating storage gas power plant according to the embodiment is divided into a dangerous zone and a safety zone, and the dangerous zone includes a cargo system, a fuel gas supply system, a gas turbine power generation system, a waste heat recovery steam generator, and a steam turbine power generation system. Including, the safety zone includes a residential zone, the blast wall may be installed between the danger zone and the safety zone.

The fuel gas supply system according to the embodiment may further include a fuel gas supply line for vaporizing the liquefied natural gas of the cargo system with the fuel gas and supplying it to a demand destination on land.

The fuel gas supply system according to the embodiment includes a power supply line for supplying the power produced by the first generator and the second generator to land demand; Further comprising, the fuel gas supply line and the power supply line, the spark (spark) generated in the power supply line may be provided so as not to affect the fuel gas supply line.

According to a second preferred embodiment of the present invention, in the arrangement structure of a floating storage gas power plant, a fuel gas supply system for vaporizing liquefied natural gas of a cargo system with fuel gas and supplying it to a demand on land is provided with an upper deck portion. It provides an arrangement structure of a floating storage gas power plant, characterized in that installed in.

As a third preferred embodiment of the present invention, in the arrangement structure of a floating storage gas power plant, a fuel gas supply system for vaporizing liquefied natural gas of a cargo system with fuel gas and supplying it to a demand on land is provided with a lower deck side. It provides an arrangement structure of a floating storage gas power plant, characterized in that installed in.

According to the present invention, the fire storage or gas-fired plant is divided into a safety zone in which a living area is disposed, and a danger zone in which a fuel gas supply system, a gas turbine power generation system, a waste heat recovery steam generator, and a steam turbine power generation system are disposed, thereby providing a fire or The risk of explosion can be minimized.

1 is a conceptual diagram showing the overall configuration of a floating storage gas power plant according to a preferred embodiment of the present invention.

2 is a perspective view showing a floating storage gas power plant according to a preferred embodiment of the present invention.

Figure 3 is a rear view showing a floating storage gas power plant according to a preferred embodiment of the present invention.

4A and 4B are a top view and a front view of a floating storage gas power plant arrangement according to a preferred embodiment of the present invention, respectively.

5A and 5B are a top view and a front view of a floating storage gas power plant arrangement according to a preferred embodiment of the present invention, respectively.

6 is a top view of a stray storage gas power plant arrangement according to another embodiment of the present invention.

Hereinafter, the configuration and operation according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. In addition, the following examples may be modified in many different forms, and the scope of the present invention is not limited to the following examples.

1 is a conceptual diagram showing the overall configuration of a floating storage gas power plant according to a preferred embodiment of the present invention, Figure 2 is a perspective view showing a floating storage gas power plant according to a preferred embodiment of the present invention, Figure 3 is a preferred embodiment of the present invention 4A and 4B are respectively a top view and a front view of a floating storage gas power plant arrangement according to a preferred embodiment of the present invention, and FIGS. 5A and 5B. 6 is a top view and a front view of a floating storage gas power plant arrangement according to a preferred embodiment of the present invention, and FIG. 6 is a top view of a floating storage gas power plant arrangement according to another embodiment of the present invention.

1 to 5b, the floating storage gas power plant according to a preferred embodiment of the present invention stores the liquefied natural gas (LNG) in the cargo (1100, 1200) of the floating structure 10, the liquefied natural gas Can be used to produce electric power.

Arrangement structure of the floating storage gas power plant according to a preferred embodiment of the present invention, the cargo system for storing the liquefied natural gas in the floating structure, loading and offloading the liquefied natural gas; A fuel gas supply system installed in the floating structure to vaporize and supply liquefied natural gas of the cargo system to fuel gas; A gas turbine power generation system including a gas power generation unit operating with fuel gas supplied from the fuel gas supply system, and a first generator for generating power by the gas power generation unit; A waste heat recovery steam generator (HRSG) for generating steam by using waste heat of exhaust gas generated from the gas power generating unit; And a steam turbine operating with steam supplied by the waste heat recovery steam generator and a second generator for generating power by the steam turbine, wherein the floating structure includes a hazardous area and a safety area. The fuel cell supply system, the gas turbine power generation system, the waste heat recovery steam generator are disposed in the dangerous zone, the residential zone is disposed in the safety zone, and the fuel gas supply system of the dangerous zone is disposed at the stern. Can be.

Here, for convenience of description, the gas turbine power generation system 3000, the waste heat recovery steam generator 4000, and the steam turbine power generation system 5000 are all included as a power generation unit. Here, the gas power generating unit includes a gas turbine, and is defined as a concept including a gas turbine and a gas engine.

The power generation unit further includes a condenser C for cooling and condensing steam supplied from the waste heat recovery steam generator 4000 with water in the steam turbine 5100.

In addition, the gas turbine power generation system 3000 is defined as a concept including a gas turbine and a gas engine.

The condenser C is connected to the sea water supply system 6100 described later. The seawater supply system 6100 serves to cool the condenser C using seawater.

In addition, the floating structure 10 is defined as a concept including not only a structure floating on the sea but also a structure fixed to the bottom surface by the fixing means.

The floating storage gas power plant according to the preferred embodiment of the present invention can supply the produced electricity to the offshore demand source 20 and / or the onshore demand source 30, and supply surplus electricity to the necessary place of the floating storage gas power generation plant itself. Can be.

The fuel gas supply system 2000 is configured to supply fuel gas to at least one of the outside of the gas turbine power generation system 3000 and the floating structure 10. The fuel gas is supplied to the outside of the floating structure 10. It includes a fuel gas supply line (L) for supplying.

The cargo system 1000 includes a plurality of cargo (1100, 1200) installed inside the floating structure 10 for the storage of liquefied natural gas; And a cargo handling system 1300 for controlling loading and offloading of the cargo 1100 and 1200. Here, the cargo may be composed of two or more, but for convenience of description, the first cargo 1100 and the second cargo 1200 will be described.

It includes a loading arm (1000a) is installed on the starboard side of the floating structure (10), the loading arm (1000a) is preferably installed in the middle (middle) of the floating structure (10), It is configured to engage with the manifold of LNGC (LNG carrier) upon loading.

The cargo system 1000 further includes a flare unit 1400 for burning off the waste gas of the BOG. The waste gas of the BOG may be emitted to the atmosphere, but in consideration of environmental protection, it is incinerated through the flare unit 1400 in accordance with marine regulations.

The cargo handling system 1300 includes a liquefied natural gas loading line 1310 for selectively storing liquefied natural gas in the plurality of cargoes 1100 and 1200; A main line 1320 for sending liquefied natural gas to the fuel gas supply system 2000 from another cargo not loaded among the plurality of cargoes 1100 and 1200; A BOG offloading line (1330) connected to the fuel gas supply system (2000) to reliquefy the BOG; And a BOG compressor 1350 for compressing the BOG of the BOG off-loading line 1330 and sending the BOG to the recondensation apparatus 2100 of the fuel gas supply system 2000.

In the arrangement structure of the floating storage gas power plant according to the preferred embodiment of the present invention, the gas turbine power generation system 3000 and the waste heat recovery steam generator 4000 are disposed adjacent to the deck of the floating structure 10. Can be.

The gas turbine power generation system 3000 is disposed such that the gas turbine power generation system 3000 is not placed above the first and second cargoes 1100 and 1200, and the waste heat recovery steam generator 4000 is disposed in the first space. And it may be disposed to be located above the second cargo (1100, 1200). As such, the gas turbine power generation system 3000, which is a firearm device, may be installed at the safest position from the first and second cargoes 1100 and 1200 to increase explosion safety.

Meanwhile, referring to FIGS. 4A to 4B, in the arrangement structure of the floating storage gas power plant according to the present invention, the fuel gas supply system 2000 in the hazardous area may be disposed above the stern side deck. The gas turbine power generation system 3000 may further include a gas turbine power generation system 3000 configured to generate power by receiving fuel from the fuel gas supply system 2000. It may further include a power supply line for supplying the power produced from the power generation unit to the on-site power demand. The fuel gas supply system may further include a fuel gas supply line which is branched in the middle of a line for supplying fuel from the fuel gas supply system 2000 to the gas turbine power generation system 3000 and supplies gas to a gas demand destination on land. The power supply line and the fuel gas supply line may be provided at a distance such that sparks generated from the power supply line do not affect the fuel gas supply line. For this purpose, the power generation unit may be arranged on the player side. As such, the fuel gas supply system 2000 for supplying the gas to the land is disposed above the stern deck, the power generation unit is disposed on the bow side, and the power supply line and the fuel gas supply line are spaced apart. When the supply line and the fuel gas supply line are arranged in close proximity, the spark generated from the power supply line may minimize the risk of fire or explosion that may occur on the fuel gas supply line.

In addition, a blast wall (BW) is installed between the steam turbine power generation system in the hazardous area and the residential area in the safe area, thereby ensuring the safety of life in case of fire or explosion.

Meanwhile, referring to FIGS. 5A to 5B, in the arrangement structure of the floating storage gas power plant according to the present invention, the fuel gas supply system 2000 in the hazardous area may be disposed under the stern side deck. Since other configurations and arrangements are the same as those of FIGS. 4A to 4B, description thereof will be omitted.

5A to 5B, a fuel gas supply system 2000 for supplying gas to the land is disposed under the stern side deck, and a power generation unit is disposed on the bow side, while a power supply line and a fuel gas supply line are disposed. When the power supply line and the fuel gas supply line are arranged in close proximity to each other, the sparks generated from the power supply line are provided to be spaced apart so as not to affect the fuel gas supply line, Minimize the risk of fire or explosion. In addition, a blast wall is installed between the steam turbine power generation system in the hazardous area and the residential area in the safe area, thereby ensuring the safety of life in case of fire or explosion.

6 is a top view of a stray storage gas power plant arrangement according to another embodiment of the present invention. As shown in FIG. 6, the arrangement of the floating storage gas power plant according to FIG. 6 is basically similar to that of the floating storage gas power plant shown in FIG. 4A. However, it differs from FIG. 4A in that the blast wall BW is omitted.

As described above, the structure of the cargo hold for submersible liquid cargo and the floating offshore structure including the same have been described with reference to the illustrated drawings, but the present invention is not limited to the embodiments and drawings described above. Of course, various modifications and variations can be made by those skilled in the art within the scope of the claims.

Claims (8)

A cargo system for storing liquefied natural gas in a floating structure and for loading and offloading liquefied natural gas; A fuel gas supply system installed in the floating structure to vaporize and supply liquefied natural gas of the cargo system to fuel gas; A gas turbine power generation system including a gas power generation unit operating with fuel gas supplied from the fuel gas supply system, and a first generator for generating power by the gas power generation unit; A waste heat recovery steam generator (HRSG) for generating steam by using waste heat of exhaust gas generated from the gas power generating unit; And A steam turbine operating with steam supplied from the waste heat recovery steam generator, and a steam turbine power generation system including a second generator for generating power by the steam turbine; The fuel gas supply system arrangement structure of a floating storage gas power plant, characterized in that disposed in the bow. The method according to claim 1, The fuel gas supply system arrangement structure of the floating storage gas power plant, characterized in that disposed on the upper deck side. The method according to claim 1, The fuel gas supply system arrangement structure of a floating storage gas power plant, characterized in that disposed on the lower deck side. The method according to claim 1, It is divided into a danger zone and a safety zone, The hazardous zone includes a cargo system, a fuel gas supply system, a gas turbine power generation system, a waste heat recovery steam generator and a steam turbine power generation system, the safety zone including a residential zone, a blast wall between the hazardous zone and the safety zone. (Blast Wall) arrangement structure of the floating storage gas power plant, characterized in that installed. The method according to claim 1, A fuel gas supply line for vaporizing liquefied natural gas of a cargo system with fuel gas and supplying it to a demand destination on land; Arrangement structure of the suspended storage gas power plant further comprises a. The method according to claim 5, A power supply line for supplying power produced by the first and second generators to a demand destination on land; More, And the fuel gas supply line and the power supply line are arranged such that sparks generated from the power supply line are spaced apart from each other so as not to affect the fuel gas supply line. In the arrangement structure of the floating storage gas power plant, a fuel gas supply system for vaporizing the liquefied natural gas of the cargo system to fuel gas and supplying it to a demand on land is installed on the upper deck of the floating storage gas power plant. Layout structure. In the arrangement structure of the floating storage gas power plant, a fuel gas supply system for vaporizing the liquefied natural gas of the cargo system to fuel gas and supplying it to the demand on land is installed in the lower deck of the floating storage gas power plant. Layout structure.

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