KR20150103429A - Steam turbine power generation modulation and arrangement structure of the same in mobile type floating storage power generation plant - Google Patents

Abstract

A steam turbine power generation module in the present invention comprises a steam turbine for generating electricity on an upper part of a sea structure including a liquefied natural gas cargo hold. The steam turbine is installed on a support plate installed on an upper part of a main deck of the sea structure, and a compressor is installed on the lower part of the steam turbine. A condensed water pump for feeding condensed water condensed in a condenser to a waste heat recovery device is installed on the bottom of a steam turbine and is arranged lower than the steam turbine.

Description

TECHNICAL FIELD [0001] The present invention relates to a steam turbine power generation module and a steam turbine power generation module in a portable floating storage power plant,

The present invention relates to a portable floating storage power plant having a thermal power generation module capable of vaporizing liquefied natural gas stored in a liquefied natural gas storage window and generating electricity using the vaporized fuel gas, and more particularly, The present invention relates to a steam turbine power generation module and a structure of a steam turbine power generation module of a portable floating storage power plant in which a condenser and a condensate pump are disposed at a relatively lower position than a steam turbine in order to secure an NPSHa.

In recent years, there has been an increasing interest in electric production using natural gas as a demand for environmentally friendly development.

In emerging economies where power supply is not smooth, interest in gas power generation is increasing. Due to the nature of gas power generation, gas infrastructure such as gas storage on land must be equipped to produce electricity.

In the case of existing onshore development, a combined cycle power plant is formed on the land, and various equipment and equipment necessary for power generation are placed on the land. As a result, all installation, layout, and testing are performed at the site and the risks are constantly present, and all the systems are independently located in separate buildings, resulting in high consumption of buildings, piping, and materials. That is, a separate natural gas storage facility, a gasification facility, and a power generation facility are respectively located.

Normally, steam from a steam turbine generator module is condensed, cooled and recycled through a condenser. The condensate is condensed to a high NPSHr due to low-pressure and high-temperature condensate conditions in the condenser. , And a high effective suction head (NPSHa) should be secured to pump the corresponding condensate. For this purpose, the condensate pump should be located at a considerably lower position than the steam turbine according to the calculation results.

In a conventional offshore combined cycle power plant, the steam turbine power generation module pumps the wells and places the condensate pump below the ground so that the steam turbine is positioned on the ground and the condensate pump is positioned lower. Liquefied natural gas is stored in a separate storage tank and natural gas is used as fuel for the gas turbine.

In float-type liquefied natural gas storage power plants and general ships, it is common to place the steam turbine in the machine room with the rear bulkhead of the cargo hold. In this case, the length of the hull must be secured as much as the space required by the arrangement of the steam turbine, And maintenance, especially equipment.

No. 10-2011-0040119 Publication No. 10-2012-0041814

In the present invention, since the condensate pump and the condenser are arranged relatively lower than the steam turbine to ensure the effective suction head (NPSHa), there is no need to unnecessarily increase the length of the hull, and the drying cost is reduced and the support plate is connected to the deck The present invention provides a steam turbine power generation module and a structure of a steam turbine power generation module of a portable floating storage power plant, which is improved in ease of maintenance by ensuring maximum accessibility to a steam turbine chamber in a control room and a residence.

According to one aspect of the present invention, there is provided a thermal power generation module and a residence, wherein the thermal power generation module is disposed at a stern side of a marine structure, and the residence is provided at a forward side of the marine structure The thermal power generation module includes a gas power generation unit for generating electricity using vaporized liquefied natural gas as fuel gas, a waste heat recovery device for producing high temperature and high pressure steam by using the waste heat of the gas power generation unit, A support plate is installed at a predetermined height from the upper surface of the main deck of the sea structure, the steam turbine is installed on the support plate, the steam turbine is installed on the support plate, And a condensing pump is installed on the bottom of the steam turbine room The steam turbine power generation module of the collapsible floating storage power plant is provided.

The condenser may be composed of a downstream discharge type condenser or an axial flow discharge type condenser.

The support plate is disposed to be connected to the A deck of the residence so as to maximize accessibility to the steam turbine chamber in the control room and the residence, thereby enhancing ease of maintenance.

An adjustment chamber and a dwelling hole may be provided on the forward side of the marine structure and the thermal power generation module may be installed on the aft side of the marine structure.

The liquefied natural gas holding window may be disposed below the thermal power generation module, and a Machinery Space may be disposed below the housing.

The structure of the occupant side arrangement structure of the dwelling section enables the viewability in the wheelhouse in the dwelling section to be secured and the approach distance to the engine room to be shortened during the navigation.

A propeller may be disposed at the stern of the marine structure, which includes a floating storage regenerator.

According to another aspect of the present invention, there is provided a portable floating storage power plant having a condenser and a condensate pump disposed at a relatively lower position than the steam turbine in order to secure an effective suction head (NPSHa) Turbine power generation module layout structure is provided.

As described above, according to the present invention, a steam turbine is installed on a support plate provided on an upper portion of a main deck of a marine structure, a condenser for condensing waste steam generated in a steam turbine is installed on a support plate, The condensate pump for supplying the waste heat recovering device is installed at the bottom of the steam turbine room and relatively lower than the steam turbine to secure the effective suction head (NPSHa), so that the length of the hull is not required to be unnecessarily long, .

In addition, the support plate is arranged to be connected to the A deck of the residence so that the accessibility to the steam turbine chamber is maximized in the control room and the residence, so that the maintenance plate is easy to maintain and convenient.

In addition, the adjustment room, the residence, and the engine room equipped with various equipments can be optimally arranged to improve the visibility during operation and the efficiency of the operation.

Further, since the liquefied natural gas storage window is disposed at the greatest distance from the dwelling house, the present invention has the effect of minimizing the risk of personal injury due to gas explosion.

It also minimizes the risks associated with site work by avoiding product and environmental problems and maximizing yard drying and commissioning yards.

In addition, when constructing a gas power plant in a country without a gas infrastructure, it is necessary to integrate the offshore gas storage facility and the gas combined power plant separately into one facility and to build it in a ship form in the shipyard, Cost can be reduced drastically.

In addition, it will minimize the construction of the sites required for the facilities and enable the gas power infrastructure to be supplied in a short time in areas without gas infrastructure.

1 is a view showing a structure of a steam turbine power generation module and a structure of a steam turbine power generation module of a portable floating storage power plant according to a first embodiment of the present invention;
2 is a schematic view showing a combined-cycle thermal power generation module of the present invention
3 is a view showing a structure of a steam turbine power generation module and a structure of a steam turbine power generation module of a portable floating storage power plant according to a second embodiment of the present invention.
4 is a view showing an engine power module arrangement structure of a portable floating storage power plant according to a third embodiment of the present invention;

Hereinafter, a steam turbine power generation module and a steam turbine power generation module arrangement structure of a portable floating storage power plant according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a structure of an arrangement of a steam turbine power generation module and a steam turbine power generation module of a portable floating storage power plant according to a first embodiment of the present invention.

Referring to FIG. 1, a portable floating storage power plant 100 according to a first embodiment of the present invention includes a thermal power generation module 110 for generating electric power using liquefied natural gas as fuel, a propulsion unit 120).

The propeller 120 may be a thruster or a propeller. The propeller 120 may be driven by electric power produced by a gas turbine and / or an engine generator (hereinafter referred to as a gas generator unit 111) or another drive source, which will be described later.

A residence 130 is disposed on the forward side of the offshore structure 150. Here, the sea structure 150 is defined as a concept including a floating storage re-gasification unit (FSRU).

The vaporizer of the floating storage regeneration facility vaporizes the LNG supplied from the storage tank 120 using natural gas such as seawater or steam and converts it into natural gas to be supplied to the gas generator unit 111. For example, Or on the main deck D of the vehicle.

The thermal power generation module 110 and the habitat 130 are installed on the upper space of the sea structure 150 having the liquefied natural gas storage window 140, that is, on the main deck D.

The thermal power generation module 110 may be disposed at the stern side of the sea structure 150 and the habitat 130 may be disposed at the forward side of the sea structure 150.

The liquefied natural gas storage window 140 is disposed below the main deck D of the offshore structure 150 in which the thermal power generation module 110 is installed.

A machinery space 160 may be disposed below the main deck D of the offshore structure 150 in which the lower portion of the residence 130 is installed. The engine room 160 may be equipped with various equipment such as a cooling water facility, an utilities facility, and a lubrication facility.

In the case of a floating storage power generation plant in which a floating storage re-gasification unit (FSRU) that moves is combined with a combined-cycle power plant, the control room for the sailing is installed in the residence so that the placement of the residence is greatly influenced. Side arrangement structure of the engine 130 allows the visibility to be ensured in the control chamber 133 of the accommodation hole 130 and the approach distance to the engine room 160 to be shortened to the shortest distance.

In the steam turbine power generation module, steam generated in the steam turbine 113 is condensed by the condenser 114, and the condensed water pump 115 supplies the condensed water to the waste heat recovery unit (HRSG) 112 again. The condenser 114 draws and cools the sea water using a seawater pump P to cool the hot steam.

The support plate 170 is installed at a predetermined height from the upper surface of the main deck D of the sea resisting structure 150 and the steam turbine 113 is installed on the support plate 170 .

Another support plate 171 is installed at a lower position than the support plate 170 and a condenser 114 of a downstream discharge type is installed in the support plate 171 at a relatively lower height than the steam turbine 113. A condensate pump 115 is installed at the bottom of the steam turbine room.

The support plate 170 is arranged to be connected to the A deck of the dwelling unit 130 so as to maximize the accessibility to the steam turbine chamber at the control room 133 and the dwelling unit 130, Path shown).

2 is a configuration diagram showing the thermal power generation module of the present invention.

2, the thermal power generation module 110 includes a gas generation unit 111, a waste heat recovery unit (HRSG) 112, a steam turbine power generation module, a power converter, and other equipment.

Here, the gas generating unit 111 may use a gas turbine and an engine together, or may use a gas turbine and an engine, respectively.

Examples of engines include MDT's 2 Stroke low-speed high-pressure gas injection engine (MEGI), Bachilla's medium-speed 4-stroke DFDE engine and Bachila's 2 Stroke low-speed gas injection engine.

The gas generating unit 111 may be composed of a gas turbine, a gas engine, a gas turbine, and a gas engine, among which a combined-cycle power generation of a gas turbine and a gas engine is preferable.

The engine may use MDT's 2 Stroke low-speed high-pressure gas injection engine (MEGI), Bachila's medium-speed 4-stroke DFDE engine, and Bachila's 2 Stroke low-speed gas injection engine.

The gas generating unit 111 vaporizes the liquefied natural gas in a vaporizer (not shown) and produces electricity using the vaporized gaseous fuel, and a waste heat recovery unit (HRSG) ) To generate steam of high temperature and high pressure.

The low-pressure and high-pressure steam of the waste heat recovery unit (HRSG) 112 is supplied to the steam turbine 113, and the steam turbine 113 is configured to produce electricity using such steam.

The generator G is powered by the gas generator unit 111 and the steam turbine 113 and is constructed in a single structure or is supplied with power from the gas generator unit 111 and the steam turbine 113 A plurality of structures may be provided. The power generated by the generator can be supplied to the land power demand through a power cable (not shown).

The operation and effect of the steam turbine power generation module and the steam turbine power generation module arrangement structure of the portable floating storage power plant according to the first embodiment of the present invention will be described as follows.

The portable floating storage power plant 100 of the present invention stays in any one of the sea areas to vaporize the liquefied natural gas stored in the liquefied natural gas storage window 140 and produce electricity using the vaporized fuel gas, ) To move to another location.

The thermal power generation module 110 of the present invention generates electric power using vaporized fuel gas and includes the gas generation unit 111, the waste heat recovery unit (HRSG) 112, the steam turbine power generation module, A converter (T), other equipment, and the like.

The gas generating unit 111 vaporizes liquefied natural gas in a vaporizer (not shown) and uses the vaporized gaseous fuel to produce electricity, and a waste heat recovery unit (HRSG) To generate steam of high temperature and high pressure.

The steam turbine power generation module receives high temperature and high pressure steam from a waste heat recovery unit (HRSG) 112 to produce electric power. The steam generated in the steam turbine 113 is condensed by the condenser 114, 115 again supplies the condensed water to the waste heat recovery unit (HRSG)

The steam turbine 113 is installed on a support plate 170 installed on the main deck D of the sea structure 150. The condenser 114 is installed on the support plate 171 and the condensate pump 115 Is installed at the bottom of the steam turbine room and is arranged relatively lower than the steam turbine 113 to ensure the effective suction head NPSHa. This eliminates the need for unnecessarily long hull length, thereby reducing the drying cost.

The support plate 170 is disposed so as to be connected to the A deck of the housing 130 so as to maximize the accessibility to the steam turbine room in the adjusting chamber 133 and the housing 130, It is very convenient to wear equipment.

In addition, the adjustment room 133, the residence 130, and the engine room 160 equipped with various equipments can be disposed at optimum positions to improve the visibility and operational efficiency during the operation.

In addition, since the liquefied natural gas storage window 140 is disposed at the greatest distance from the residence 130, the present invention has the effect of minimizing the risk of personal injury due to gas explosion.

It also minimizes the risks associated with site work by avoiding product and environmental problems and maximizing yard drying and commissioning yards.

In addition, when constructing a gas power plant in a country without a gas infrastructure, it is necessary to integrate the offshore gas storage facility and the gas combined power plant separately into one facility and to build it in a ship form in the shipyard, Cost can be reduced drastically.

In addition, it will minimize the construction of the sites required for the facilities and enable the gas power infrastructure to be supplied in a short time in areas without gas infrastructure.

FIG. 3 is a diagram illustrating a structure of a steam turbine power generation module and a steam turbine power generation module of a portable floating storage power plant according to a second embodiment of the present invention.

Referring to FIG. 3, the portable floating storage power plant 200 according to the second embodiment of the present invention includes a thermal power generation module 210 for generating electric power using liquefied natural gas as fuel, a propeller 220).

The thermal power generation module 210 and the habitat 230 are installed on the upper space of the sea structure 250 having the liquefied natural gas storage window 240, that is, on the main deck D.

The thermal power generation module 210 may be disposed at the stern side of the sea structure 250 and the habitat 230 may be disposed at the forward side of the sea structure 250. The liquefied natural gas storage window 240 is disposed below the main deck D of the offshore structure 250 in which the thermal power generation module 210 is installed.

A machinery space 260 may be disposed under the main deck D of the offshore structure 250 in which the lower portion of the housing 230 is installed.

The support plate 270 is installed at a predetermined height from the upper surface of the main deck D of the marine structure 250 and the steam turbine 213 is installed on the support plate 270 .

A condensate discharge type condenser 214 is installed in the support plate 270 at a relatively lower height than the steam turbine 213 and a condensate pump 215 is installed at the bottom of the steam turbine room.

The support plate 270 is disposed to be connected to the A deck of the dwelling unit 230 so as to maximize accessibility to the steam turbine chamber at the control room 233 and the dwelling unit 230, Path shown).

The steam turbine power generation module and the steam turbine power generation module arrangement structure of the portable floating storage power plant according to the second embodiment of the present invention are provided with the axial flow discharge type condenser 214, Can be arranged relatively lower than the condenser (114).

In the present invention, since the condensate pump 215 is disposed relatively lower than the steam turbine 213 to ensure the effective suction head NPSHa, there is no need to unnecessarily increase the length of the hull, thereby reducing the drying cost.

The support plate 270 is disposed so as to be connected to the A deck of the habitat 230 so as to maximize accessibility to the steam turbine room in the adjustment chamber 233 and the habitat 230, It is very convenient to wear equipment.

4 is a view showing an engine power module arrangement structure of a portable floating storage power plant according to a third embodiment of the present invention.

Referring to FIG. 4, the portable floating storage power plant 300 according to the third embodiment of the present invention includes a thermal power generation module that generates power using liquefied natural gas as fuel.

The thermal power generation module of the present invention produces electric power using vaporized fuel gas and includes an engine 311, a refractor 312, a steam turbine power generation module, and the like.

The engine 311 generates electricity using vaporized liquefied natural gas as fuel and the archer 312 generates steam using waste heat discharged from the engine 311. The steam generated by the economizer 312 is configured to be supplied to the steam turbine power generation module.

The engine 311 and the silk-screening machine 312 are installed inside the engine compartment of the main deck under the hull to reduce the center of gravity of the hull, thereby enhancing the structural stability.

The steam generated by the steam turbine 313 is condensed by the condenser 314 and the condensed water pump 315 is condensed by the condenser 314. The steam generated by the steam turbine 313 is condensed by the condenser 314, And supplies the water to the picker 312 again.

The steam turbine 313 is installed on a support plate 370 installed on the main deck D of the sea structure 350 and the condenser 314 of the downstream discharge type is installed on another support plate 371, The condensate pump 315 is installed at the bottom of the steam turbine room and is arranged relatively lower than the steam turbine 313 to ensure the effective suction head NPSHa so that the length of the hull is not required to be unnecessarily long, It is effective.

The support plate 370 is disposed so as to be connected to the A deck of the accommodation port 330 so as to maximize accessibility to the steam turbine room at the accommodation chamber 333 and the accommodation port 330, , It is very convenient to remove equipment.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and variations are possible within an even range.

100: Portable floating storage power plant
110: Thermal power module
111: Gas generating unit
112: waste heat recovery device
113: Steam turbine
114: condenser
115: Condensate pump
120: propeller
130: Residential District
133: Coordination room
140: Liquefied natural gas storage
150: Offshore structures
160: Engine room
170, 171: Support plate
D: Main deck

Claims (11)

The steam turbine is installed on a support plate installed on the main deck of the sea structure, and a condenser is installed on the lower part of the steam turbine. And the condensed water pump is installed at the bottom of the steam turbine room and is disposed relatively lower than the steam turbine. A thermal power generation module and a residence are installed in a marine structure, the thermal power generation module is disposed at a stern side of the marine structure, the residence is disposed at a forward side of the marine structure,
The thermal power generation module includes a gas power generation unit for generating electricity using vaporized liquefied natural gas as fuel gas, a waste heat recovery device for producing high temperature and high pressure steam by using the waste heat of the gas power generation unit, And a steam turbine for generating electricity using the steam supplied thereto,
A support plate is installed at a predetermined height from the upper surface of the main deck of the marine structure, the steam turbine is installed on the support plate, a condenser is installed on the lower part of the steam turbine, and a condensate pump is installed on the bottom of the steam turbine room Steam turbine power generation module of portable floating storage power plant. The method according to claim 1 or 2,
Wherein the condenser comprises any one of a downstream discharge type condenser and an axial flow discharge type condenser. The method according to claim 1 or 2,
And the support plate is disposed to be connected to the A deck of the dwelling unit. The method according to claim 1 or 2,
Wherein the liquefied natural gas storage window is disposed under the thermal power generation module and a Machinery Space is disposed under the residence. The method of claim 5,
Wherein the steam turbine power generation module has a structure in which a visibility can be secured in a steering chamber in the residence, and an approach distance from the engine room is shortened, by operating the arrangement structure on the fork side of the residence. The method according to claim 1 or 2,
And a propeller is disposed at a stern of the marine structure. The method according to claim 1 or 2,
Wherein the offshore structure includes a floating storage regeneration facility. Wherein the steam turbine is disposed at a relatively higher position than the condenser and the condensate pump in order to secure an effective suction head (NPSHa). The method of claim 9,
Wherein the condenser comprises any one of a downstream discharge type condenser and an axial flow discharge type condenser. The steam turbine of the thermal power generation module for generating electricity to the offshore structure is installed on the upper part of the sea structure, and the burner for producing steam using the engine of the thermal power generation module and the waste heat of the engine is installed inside the hull A support plate is installed at a predetermined height from the upper surface of the main deck of the marine structure, the steam turbine is installed on the support plate, a condenser is installed below the steam turbine, and a condensate pump is installed at the bottom of the steam turbine room Wherein the steam turbine power generation module is installed in a movable floating storage power plant.

Images