KR20190060559A - Lng bunkering station module and lng fueled ship having the same - Google Patents

Abstract

The present invention relates to an LNG bunkering station module for a small ship, comprising: a casing forming an appearance of the LNG bunkering station module for a small ship; an LNG supply line supplying LNG, supplied from the outside, to an LNG fuel tank arranged in the ship; a first cryogenic valve installed on the LNG supply line to adjust the flow rate of the LNG; an LNG evaporation gas collecting line discharging LNG evaporation gas generated from the LNG fuel tank to the outside; a second cryogenic valve installed on the LNG evaporation gas collecting line to adjust the flow rate of the collected evaporation gas; and a nitrogen purge line injecting a nitrogen gas into the LNG supply line or the LNG evaporation gas collecting line and purging the nitrogen gas, wherein the first cryogenic valve is a first double block and bleed valve composed of a first shutoff valve, a second shutoff valve, and a first bleed valve, the second cryogenic valve is a second double block and bleed valve composed of a third shutoff valve, a fourth shutoff valve, and a second bleed valve, and the first bleed valve of the first double block and bleed valve is connected to an LNG drain pipeline. The present invention increases LNG shutoff performance and leakage safety during LNG bunkering even though being made compact.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a LNG bunker station module for a small-sized ship, and a small-sized LNG bunker station module having the same,

The present invention relates to an LNG bunker station module for ships and an LNG bunker station module having the LNG bunker station module. More particularly, the present invention relates to an LNG bunkering station module configured to be compact for small ships and to increase the barrier and leak safety of LNG, LNG fuel-propelled small ship.

The demand for reduction of SOx, NOx and CO2 generated during the operation of ships is increasing internationally. As the price of oil increases, the ship which can reduce the operation cost of the ship by using LNG instead of the existing oil as propellant is developed .

On the other hand, the International Sulfur Cap 2020 was confirmed at the MPEC 70th meeting, making it impossible to use existing fuel oil with IFO 380, 180 (sulfur content 3.5%). Accordingly, orders for domestic and overseas vessels for LNG-fueled vessels are expected to increase starting from 2020.

It is essential to inject and supply LNG used as fuel in LNG fuel propulsion vessel. LNG bunkering is a technique to supply LNG from outside the vessel to the LNG fuel tank inside the vessel. The LNG bunkering station is an intermediate device that is safely supplied to the fuel tank in the ship, ie, located between the LNG supply source and the LNG fuel tank, from the outside for injection and supply.

Since the LNG bunkering station corresponds to a dangerous facility that directly receives LNG, it is required to comply with the international safety standards of international gas propulsion vessels. The International Gas Propulsion Standards reflect the essential safety requirements for the operation of LNG-fueled vessels, and include the requirements that take into account the risks posed by liquefied gas compared to conventional liquid fuels, particularly as regards the flammability of fuels. Dual tubing of fuel pipes to prevent gas leakage, double shutoff and discharge valves, air lock between safe and dangerous areas, and fugaling requirements of gas pipes.

On the other hand, most vessels operating within coastal areas are small vessels less than 500 tons in size. Therefore, it is not easy to directly apply LNG bunkering station facilities considering the size of conventional LNG bunkering station facilities.

Korean Patent No. 1338811

SUMMARY OF THE INVENTION It is an object of the present invention to provide a small vessel LNG bunkering station module suitable for small vessels propelled by LNG fuel.

It is also an object of the present invention to provide a compact LNG bunkering station module suitable for small ships.

It is also an object of the present invention to provide a small marine LNG bunkering station module with increased LNG barrier and leakage safety during LNG bunkering.

It is also an object of the present invention to provide an LNG bunkering station that is packaged (skidded) for easy application even in the case of converting an existing ship into an LNG fuel propulsion vessel.

The LNG bunker station module for a small ship according to the present invention comprises: a casing forming an appearance of an LNG bunker station module for a small ship; An LNG supply line for supplying the LNG supplied from the outside to the LNG fuel tank provided in the ship; A first cryogenic valve installed on the LNG supply line to regulate the flow rate of the supplied LNG; An LNG evaporative gas recovery line for discharging the LNG evaporated gas generated from the LNG fuel tank to the outside; A second cryogenic valve installed on the LNG evaporative gas recovery line for regulating the flow rate of the recovered evaporative gas; And a nitrogen purge line for purifying the nitrogen gas by injecting nitrogen gas into the LNG supply line or the LNG vapor gas recovery line, wherein the first cryogenic valve comprises a first shut-off valve, a second shut-off valve and a first double- Wherein the second cryogenic valve is a second double-block valve device comprising a third shut-off valve, a fourth shut-off valve and a second bleed valve, wherein the first bleed valve of the first double- And the valve is connected to the LNG drain pipe.

The LNG bunkering station module for a small ship according to the present invention may further include a fire detector for detecting a fire inside or around the casing; And a fire fighting facility (Fire Fighting) to suppress the fire.

Specifically, it may further include a fire-fighting storage tank in which fire-extinguishing materials of fire-fighting facilities are stored.

In addition, the fire detector may include at least one of a flame detector or a flammable gas detector, and the fire fighting equipment may include a nozzle spray to fire the fire.

The small vessel LNG bunkering station module according to the present invention may further include a leak detector for detecting LNG or evaporated gas leaking on the LNG supply line or the LNG evaporated gas recovery line.

The LNG bunker station module for a small marine vessel according to the present invention further includes a first pressure transmitter connected to the LNG supply line and sensing the pressure of the LNG supply line; A first temperature transmitter coupled to the LNG supply line to sense the temperature of the LNG supply line; A second pressure transmitter connected to the LNG evaporative gas recovery line for sensing the pressure of the LNG evaporative gas recovery line; And a second temperature transmitter connected to the LNG vaporized gas recovery line to sense the temperature of the LNG vaporized gas recovery line.

The small marine LNG bunkering station module according to the present invention also receives a sensing signal from a fire sensor, a leak detector, a first pressure transmitter, a first temperature transmitter, a second pressure transmitter and a second temperature transmitter, And may further include a programmable logic controller (PLC) for controlling the fire fighting system, the first double-block valve device or the second double-block valve device.

The LNG bunkering station module for a small ship according to the present invention may be provided with a drip tray under the LNG supply line.

In addition, the small marine LNG bunkering station module according to the present invention may include an inert fluid spray which protects the hull from LNG by spraying fluid to form a curtain.

The present invention also provides a small vessel for propelling LNG fuel equipped with the LNG bunker station module for a small ship.

Specifically, the LNG bunkering station module may be provided in an upper deck or a pilot station hatch.

In addition, the LNG fuel propulsion vessel according to the present invention may be less than 500 tons.

With the above configuration, the present invention can provide a compact LNG bunkering station module suitable for a small ship.

Also, it is possible to provide a small marine LNG bunkering station module in which the LNG bunkering and the leakage safety are increased despite being compact.

In addition, a compact fire-extinguishing storage tank to be supplied to the fire-fighting equipment can be further packaged, and even if the existing ship is to be converted into an LNG fuel propulsion vessel, it can be packaged (skid) Lt; RTI ID = 0.0 > LNG bunkering station. ≪ / RTI >

1 is a schematic view of a small marine LNG bunkering station module according to an embodiment of the present invention.
2 is a perspective view showing the outer shape of the double-block valve device.
3 is a cross-sectional view showing an internal shape of the double-block valve device.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic diagram of a small marine LNG bunkering station module according to an embodiment of the present invention. Referring to FIG. 1, the LNG bunker station module includes an LNG supply line 200, an LNG evaporation station 200, and an LNG supply line 200. The LNG bunker station module includes an LNG supply line 200, A gas recovery line 300 and a nitrogen purge line 400. The LNG bunker station module includes a casing 1000 forming an exterior of the LNG bunker station module, an LNG supply line 200 for supplying the LNG supplied from the outside to the LNG fuel tank T provided in the ship, an LNG supply line 200 A first cryogenic valve disposed on the first supply line to regulate the flow rate of the LNG supplied along the supply line, an LNG evaporative gas recovery unit for discharging LNG evaporation gas (BOG) generated from the LNG fuel tank T to the outside A second cryogenic valve installed on the LNG evaporative gas recovery line 300 for regulating the flow rate of the recovered evaporative gas and a second cryogenic valve for regulating the flow rate of the recovered nitrogen gas to the LNG supply line 200 or the LNG evaporative gas recovery line 300, And a nitrogen purge line 400 for purifying nitrogen by injecting nitrogen.

Also, the first cryogenic valve and the second cryogenic valve may be Double Block and Bleed valves (DBB valves) 210 and 310.

A double block valve device is a combination of a double ball valve and a bleed valve. In general, a valve is a device for shutting off the flow of fluid in various industrial pipes or controlling the flow rate and pressure of the fluid. Various kinds of valves are selectively used depending on the conditions of the piping and the required functions in the piping. Of the various valves currently in use, the ball valve has excellent sealing, durability, and operability, and has low fluid resistance characteristics, and is widely used for shutting off the fluid flow in the piping. On the other hand, since pipes such as offshore plant facilities, petroleum industry facilities, and cryogenic fluid handling facilities handle fluids such as petroleum and gas, it is particularly important to prevent fluid leakage and leakage in piping. And it is required to be thoroughly managed. For this reason, a double block valve device, which is a combination of a double ball valve and a bleed valve, can be utilized to enhance the piping blockage and leakage stability.

Fig. 2 shows the outer shape of the double-block valve device, and Fig. 3 shows the internal shape of the double-block valve device.

As shown in Figs. 2 and 3, the double-block valve device comprises a valve body 10, a first shut-off valve 1, a second shut-off valve 2 and a bleed valve 3. The valve body 10 is connected to a pipe (not shown) and has an inlet 11a for introducing the fluid to one side and a discharge port 11b for discharging the fluid introduced into the inlet 11a. The first shut-off valve 1 and the second shut-off valve 2 are each constituted by a ball valve and are installed in the upstream side and the downstream side of the valve body 10 in order, Thereby double-blocking or opening the fluid. The bleed valve 3 is provided between the first shut-off valve 1 and the second shut-off valve 2 so that when the first and second shut-off valves 1 and 2 are closed, the fluid leaks from the high pressure side to the low pressure side And to remove the residual pressure therein.

Normally, such a double-block valve device is operated so that the first shut-off valve 1 and the second shut-off valve are opened and the bleed valve 3 is closed when the fluid is caused to pass. When the fluid is shut off, the first shutoff valve 1 and the second shutoff valve 2 are locked at the same time, and the bleed valve 3 is operated to open. Therefore, even if the first shut-off valve 1 is opened or accidentally opened, the flow of the fluid can be blocked by the second shut-off valve 2. The fluid seeped between the first and second isolation valves 1 and 2 due to the leakage of the first isolation valve 1 or the like is reliably vented through the bleed valve 3 so that the two valves 1, It is possible to more securely manage the pressure.

In the LNG bunker station module for a small marine vessel according to an embodiment of the present invention, the bleed valve of the first double block valve device 210 is connected to the LNG drain pipe 211, and the first shutoff valve and the second shutoff valve The fluid located between the first shut-off valve and the second shut-off valve can be discharged to the drain pipe 211 through the bleed valve. In addition, since the fluid permeated between the first and second shutoff valves is also discharged to the LNG drain pipe 211 through the bleed valve, it is possible to prevent an increase in pressure between the first and second shutoff valves, The blocking ability and the leakage stability can be enhanced.

The small vessel LNG bunkering station module according to an embodiment of the present invention includes a fire detector 600 for detecting a fire inside or around the casing 1000 and a fire fighting facility 100 for suppressing a fire .

The fire detector 600 may be a flame detector or a flammable gas detector, and all of the fire detection related devices may be included and are not limited to those listed above.

The fire fighting system 100 may include a nozzle for spraying a fire from a pipe through which the fire extinguishing material moves and a pipe. A fire is a raw material for extinguishing a fire, and various fire extinguishing materials such as powder, foam, inert gas and the like can be used and are not limited to those listed above.

The small marine LNG bunkering station module according to an embodiment of the present invention may further include a small fire storage tank 120. In the case of a conventional LNG bunkering station module, a space for storing the extinguishing material, that is, a storage tank is disposed outside the module, and a small-fire storage tank and a fire-fighting facility of the LNG bunker station module are connected to each other. The module can be packaged by placing such a fire-fighting storage tank 120 in the module. This is achieved by disposing the double block valve devices 210 and 310 without installing a large number of valves on the LNG supply line 200 and the LNG evaporative gas recovery line 300, 120 can be disposed in a compact package.

The LNG supply line 200 is provided with a leak detector 240 capable of detecting leaked LNG, a first pressure transmitter 220 detecting the pressure of the LNG supply line, a first temperature sensor 240 detecting the temperature of the LNG supply line, And may include a transmitter 230. Similarly, on the LNG evaporated gas recovery line 300, there are provided a leak detector 440 capable of detecting the leaking evaporative gas, a second pressure transmitter 320 detecting the pressure of the LNG evaporative gas recovery line, And a second temperature transmitter 330 for sensing the temperature of the fire extinguishing system 100. The fire extinguishing system 100, the first double-block valve apparatus 210, or the second double- And a PLC (Programmable Logic Controller) 700 for controlling the controller 310.

More specifically, the leak detectors 240 and 440 provided on the LNG supply line 200 and the LNG evaporative gas recovery line 300 are connected to the LNG supply line 200 or the LNG evaporative gas recovery line 300, And transmit the detection signal to the PLC 700. [ The first pressure transmitter 220 and the first temperature transmitter 230 provided on the LNG supply line 200 can detect the pressure and the temperature on the LNG supply line 200 and transmit the detected pressure and temperature to the PLC 700. [ The second pressure transmitter 320 and the second temperature transmitter 330 provided on the LNG vapor recovery line 300 can detect the pressure and the temperature on the LNG vapor recovery line 300 and transmit it to the PLC 700 have. Data of the PLC 700 can be transmitted to a HMI (Human Machine Interface) PC 800 and a DCS (Distributed Control System) 900. An administrator can use the HMI PC 800 to transmit data to the HMI screen 810 or the DCS 900 to monitor and control the condition in the LNG bunkering station module and to monitor the operation of the fire fighting system 100 or the operation of the first double block valve apparatus 210 Or the opening / closing of the second double-block valve device 310 can be controlled. In addition, by making such control logic, it is possible to diagnose the monitoring state according to a predetermined level range and automatically operate the fire fighting equipment 100 or to open / close the first double-block valve device 210 or the second double- Or the degree of opening can be controlled.

The small vessel LNG bunker station module according to an embodiment of the present invention may include the PLC 700, the HMI PC 800, the HMI 810, or the fire tank 120, have. That is, when a more compact LNG bunkering station module is required, the LNG bunkering station can be miniaturized except for the fire tank 120, and there is a demand for a packaged LNG bunkering station The PLC 700, the HMI PC 800, and the HMI 810, as shown in FIG.

The small ship LNG bunkering station module according to an embodiment of the present invention includes a drip tray 500 disposed below the casing 1000, preferably below the LNG supply line 200 and below the LNG evaporative gas recovery line 300 . The trip tray 500 is designed to prevent damages to the ship. The trap tray 500 is connected to the piping, preferably the LNG supply line 200 or the LNG evaporative gas recovery line 300, due to the LNG corresponding to the cryogenic temperature during bunkering or fuel movement. And may be provided at a predicted point where water is formed or a fluid is dropped, such as a lower portion to which the LNG supply line 200 or the LNG vapor recovery line 300 is connected.

The small marine LNG bunkering station module according to an embodiment of the present invention may include an inert fluid spray (not shown). An inert fluid spray is a structure that protects the hull bulkhead by spraying water or an inert fluid such as nitrogen to the hull bulkhead. For example, if the fuel leaks during the bunkering operation and the cryogenic fuel moves to the hull bulkhead, As a result of safety accidents, fluid is sprayed from the inert fluid spray to the hull bulkhead to form a curtain shape to protect the hull bulkhead.

The small ship LNG bunkering station module described above can be mounted on an LNG fuel propulsion vessel. In addition, since it is modularized (packaged and skid-ized), it is possible to easily mount and adapt the new vessels as well as modified vessels modified by LNG fuel propulsion.

The small ship referred to herein preferably includes a ship of less than 500 ton class. In the case of such a small ship, a large-sized LNG bunkering station module mounted on a medium-sized ship can not be installed as it is, so a miniaturized module is required, and the LNG bunkering station module according to the present invention can meet such a demand.

The small vessel LNG bunkering station module according to the present invention may be provided on an upper deck of the vessel, preferably on the upper side of the upper deck. The LNG bunkering station module for a small marine vessel according to the present invention may be installed on both sides of the ship, preferably in a pilot station hatch.

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 exemplary embodiments, It will be appreciated that embodiments are possible. Accordingly, the true scope of the present invention should be determined by the appended claims.

100: Fire fighting equipment 200: LNG supply line
300: LNG evaporative gas recovery line 400: nitrogen purge line
500: Drip tray 600: Fire detector
700: PLC 800: HMI PC
900: DCS 1000: casing

Claims (12)

In a small marine LNG bunkering station module,
A casing 1000 forming an appearance of the small marine LNG bunkering station module;
An LNG supply line 200 for supplying the LNG supplied from the outside to the LNG fuel tank T provided in the ship;
A first cryogenic valve installed on the LNG supply line 200 to regulate a flow rate of the supplied LNG;
An LNG evaporative gas recovery line 300 for discharging the LNG evaporated gas generated from the LNG fuel tank T to the outside;
A second cryogenic valve installed on the LNG evaporative gas recovery line (300) to regulate the flow rate of the recovered evaporative gas; And
And a nitrogen purge line (400) for purifying nitrogen gas by injecting nitrogen gas into the LNG supply line (200) or the LNG evaporative gas recovery line (300)
The first cryogenic valve is a double block and bleed valve (210) comprising a first shut-off valve, a second shut-off valve and a first bleed valve,
The second cryogenic valve is a second double-block valve device 310 comprising a third shut-off valve, a fourth shut-off valve and a second bleed valve
And the first bleed valve of the first double-block valve device (210) is connected to the LNG drain pipe (211). The method according to claim 1,
A fire detector 600 for detecting a fire in or around the casing 1000; And
And a fire fighting facility (Fire Fighting, 100) for extinguishing the fire. 3. The method of claim 2,
And a small fire storage tank (120) in which the fire extinguishing material of the fire fighting equipment (100) is stored. The method of claim 3,
The fire detector 600 may include one or more of a flame sensor or a flammable gas sensor,
Characterized in that the fire fighting equipment comprises a nozzle spray for spraying a fire. ≪ RTI ID = 0.0 > 15. < / RTI > 3. The method of claim 2,
And a leakage detector (240, 440) for detecting LNG or evaporative gas leaking on the LNG supply line (200) or the LNG evaporative gas recovery line (300). 6. The method of claim 5,
A first pressure transmitter (220) connected to the LNG supply line (200) and sensing a pressure of the LNG supply line (200);
A first temperature transmitter (230) connected to the LNG supply line (200) and sensing the temperature of the LNG supply line (200);
A second pressure transmitter (320) connected to the LNG evaporative gas recovery line (300) to sense the pressure of the LNG evaporative gas recovery line (300); And
And a second temperature transmitter (330) connected to the LNG evaporative gas recovery line (300) for sensing a temperature of the LNG evaporative gas recovery line (300). The method according to claim 6,
The fire detector 600, the leakage detectors 240 and 440, the first pressure transmitter 220, the first temperature transmitter 230, the second pressure transmitter 320 and the second temperature transmitter 330 And a PLC (programmable logic controller) 700 for controlling the fire fighting equipment 100, the first double-block valve device 210 or the second double-block valve device 310 is connected to the received sensing signal The LNG bunker station module for a small marine vessel. The method according to claim 1,
And a drip tray (500) is provided below the LNG supply line (200) or below the LNG evaporative gas recovery line (300). The method according to claim 1,
And spraying fluid to form a curtain shape to protect the hull from the LNG. ≪ RTI ID = 0.0 > [0002] < / RTI > An LNG fuel propulsion small vessel equipped with a small vessel LNG bunker station module according to any one of claims 1 to 9. 11. The method of claim 10,
Wherein the LNG bunker station module is provided on an upper deck or in a pilot station hatch. 11. The method of claim 10,
The LNG fuel-propelled small-sized vessel is less than 500 tons in size.

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