KR101873780B1 - Fuel supply system of ship - Google Patents

Abstract

Disclosed is a fuel supply system of a ship that is capable of preventing a fuel supply pipe from being exploded, thereby performing efficient fuel gas supply through the fuel supply pipe. According to the present invention, the fuel supply system of a ship includes: a storage tank for supplying fuel; a fuel supply part for transforming the fuel received from the storage tank into fuel satisfying fuel supply conditions of an engine; a valve unit for supplying the transformed fuel to the engine; an inert gas supply part for supplying inert gas; and a double pipe for connecting the engine and the valve unit to each other, wherein the double pipe has an inner pipe to which the fuel flows, an outer pipe spaced apart from the inner pipe by a given distance to surround the inner pipe, and a plurality of partition walls disposed between the inner pipe and the outer pipe.

Description

[0001] FUEL SUPPLY SYSTEM OF SHIP [0002]

The present invention relates to a fuel supply system for a ship.

The International Maritime Organization (IMO) regulates harmful gases such as nitrogen oxides and sulfur oxides in the gas discharged to the outside of the ship.

Especially, in case of Emission Control Area (ECA), gas emission standards are very strict compared with the general sea area. Therefore, for ships passing through the exhaust emission restriction area, the fuel oil should be used instead of heavy fuel oil (HFO).

On the other hand, in the case of a ship using vaporized liquefied gas as a fuel, there is a risk that when the fuel gas leaks from the fuel supply pipe, the combustible component may explode. Accordingly, various techniques have been disclosed in the past to prevent the above-described explosion hazard. As a related art, refer to Korean Patent Laid-Open No. 10-2015-0137812 (published on Dec. 12, 2015).

Korean Patent Laid-Open No. 10-2015-0137812 (Dec. 09, 2015)

An embodiment of the present invention seeks to provide a fuel supply system of a ship that prevents an explosion hazard of the fuel supply pipe and allows an efficient fuel gas supply to be made through the fuel supply pipe.

According to an aspect of the present invention, there is provided a fuel cell system including: a storage tank for supplying fuel; A fuel supply unit for converting the fuel supplied from the storage tank to a fuel supply condition of the engine; A valve unit for supplying the converted fuel to the engine; An inert gas supply unit for supplying an inert gas; And a double pipe connecting the engine and the valve unit, wherein the double pipe includes an inner pipe through which the fuel flows and an outer pipe surrounding the inner pipe with a certain space, and the inner pipe and the outer pipe The inert gas is supplied to the first space among the spaces defined by the partition walls and the fuel of the ship through which the heating medium flows in the second space for heat exchange with the fuel flowing in the inner tube, A supply system may be provided.

A sensor portion provided in the double pipe and sensing fuel leaked between the inner pipe and the outer pipe; and a sensor portion provided in the double pipe through the inert gas supply portion when the leaked fuel is detected by the sensor portion And a catalytic reacting unit that receives the leaked fuel pushed by the pressure of the inert gas supplied to the first space and reacts with the catalyst to convert the leaking fuel into a harmless component.

The fuel supply system of the ship according to the embodiment of the present invention prevents the danger of explosion of the fuel supply pipe and enables efficient fuel gas supply through the fuel supply pipe.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a cross-sectional view showing a fuel supply system of a ship according to an embodiment of the present invention.
2 is a plan view of a dual pipe included in the fuel supply system of FIG.
Fig. 3 is a perspective view showing another example of the double pipe shown in Fig. 2. Fig.
Fig. 4 is a perspective view showing another example of the double pipe shown in Fig. 2. Fig.
5 is a cross-sectional view showing a fuel supply system of a ship according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

Referring to FIGS. 1 and 2, a fuel supply system 100 for a ship according to an embodiment of the present invention includes a first storage tank 111 for supplying a first fuel toward the engine E, A fuel supply unit 120 for converting the first fuel supplied from the fuel supply unit 111 according to the fuel supply condition of the engine E and a second fuel supply unit 120 for supplying the first fuel via the fuel supply unit 120 to the engine E, (E) by a first double pipe (P1) including an inner pipe (P ') through which the fuel flows and an outer pipe (P' ') surrounding the inner pipe (P' Unit 130, as shown in FIG.

Here, the pipe structure included in the valve unit 130 may be provided as a second double pipe P2 having the same shape as the first double pipe P1. In FIG. 1, for the sake of clarity, the valve unit 130 is shown wrapped around the valve unit 130. And the second double pipe P 2 is in communication with the first double pipe P 1.

The fuel supply system 100 is provided with an inert gas supply unit 140 for supplying an inert gas and at least one of the first and second double pipes P1 and P2 so that the first and second double pipes P1, Sensor portions 151 and 152 for sensing the first fuel leaking into the space S between the inner pipe P 'and the outer pipe P' of the first and second fuel lines P1 and P2 and the leakage of the first fuel by the sensor portions 151 and 152 And a control unit 160 for supplying an inert gas to the space S through the inert gas supply unit 140 when it is sensed.

The fuel supply system 100 is also operated by the pressure of the inert gas supplied to the space S between the inner pipe P 'of the first and second double pipes P1 and P2 and the outer pipe P' And a catalytic reaction unit 170 that receives the leaking first fuel and converts it into a harmless component by reacting with the catalyst.

In addition, the fuel supply system 100 of the vessel may include a second storage tank 112 for storing the second fuel. At this time, when the first fuel leaks, the second fuel can be supplied to the engine E in place of the first fuel.

Hereinafter, each component of the fuel supply system 100 will be described in detail.

The first storage tank 111 is connected to the fuel supply unit 120 and the valve unit 130 by the first fuel supply line L1 and is connected to the engine 120 via the first and second double pipes P1 and P2. E). ≪ / RTI > The first fuel is stored in the first storage tank 111 in a liquefied state. The first fuel may be, for example, a low sulfur fuel, and may include methanol, ethanol, LPG, and the like.

Here, the engine E may be a dual fuel engine. In this case, the fuel supply system 100 of the ship can supply the above-described first fuel as the main fuel to the engine E and the second fuel stored in the second storage tank 112 as the auxiliary fuel. The second fuel may include, for example, diesel oil or the like, and may be supplied to the engine E via the second fuel supply line L5.

The fuel supply unit 120 may convert the pressure, temperature, state, etc. of the first fuel supplied from the first storage tank 111 according to the fuel supply condition of the engine E. In addition, when the second fuel is supplied from the second storage tank 112, the fuel supply unit 120 may convert the pressure, temperature, and the state of the second fuel according to the fuel supply condition of the engine E.

To this end, the fuel supply unit 120 may include various means such as a plurality of compressors, a cooler, and a heat exchanger. The configuration and operation contents of the means for changing the pressure, temperature, state, etc. of the fuel according to the fuel supply conditions of the engine are variously disclosed in the conventional publications, and thus detailed description thereof will be omitted. The fuel that has passed through the fuel supply unit 120 can be converted into a gaseous state.

The valve unit 130 supplies the first fuel through the fuel supply unit 120 to the engine E and controls the flow rate of the fuel to meet the fuel supply conditions of the engine E, Path control, and the like.

When the first fuel leaks into the space S between the inner pipe P 'and the outer pipe P' of the first and second double pipes P1 and P2, the inert gas supply unit 140 supplies inert gas And supplies the inert gas to the space S through the supply line L2. This is to prevent explosion due to flammable components of the first fuel leaking into the space S between the inner tube P 'and the outer tube P "of the first and second double pipes P1 and P2 to be. The inert gas may include nitrogen and the like. The gas component of the first fuel pushed by the pressure of the supercharged inert gas is transferred to the catalytic reaction part 170. The liquid component of the first fuel is supplied to the drain tank 113, Lt; / RTI >

One or more of the sensor units 151 and 152 may be provided in the first and second double pipes P1 and P2 and the inner pipe P ' And the first fuel leaking into the space S between the fuel cells P " The first sensor unit 151 may be provided on the first double pipe P1 connecting the valve unit 130 and the engine E and the second sensor unit 152 may be provided on the valve unit 130 And may be provided in the second double pipe P2.

The sensor units 151 and 152 are connected to the sensor unit 151 and 152 so as to sense the first fuel leaking into the space S between the inner pipe P 'and the outer pipe P' of the first and second double pipes P1 and P2, May be provided so as to protrude toward the space S in a state in which a part of the outer tube P "is fixed to the outer tube P".

The control unit 160 may control each component of the fuel supply system 100. For example, the control unit 160 may control the amount of the water in the space S between the inner pipe P 'and the outer pipe P' of the first and second double pipes P1 and P2 by one or more of the sensor units 151 and 152 1 fuel is detected, the inert gas supply unit 140 may be operated so that the inert gas is supplied to the space S. At this time, the controller 160 opens the valve 140a on the inert gas supply line L2. The inert gas supplied to the space S between the inner pipe P 'and the outer pipe P' of the first double pipe P1 and the second double pipe P2 is supplied to the corresponding space S The explosion due to the combustible component of the leaking first fuel can be prevented.

The control unit 160 controls the amount of air flowing between the inner pipe P 'and the outer pipe P' of the first and second double pipes P1 and P2 of the first double pipe P1 and the second double pipe P2, The valve 170a on the vapor phase discharge line L3 and the valve 113a on the liquid phase discharge line L4 can be opened for the treatment of the leaking first fuel into the space S of the liquid phase discharge line L3. The gas component of the first fuel pushed by the pressure of the inert gas can be transferred to the catalytic reaction part 170 and the liquid component of the first fuel can be transferred to the drain tank 113.

The control unit 160 closes the valve 111a on the first fuel supply line L1 and opens the valve 112a on the second fuel supply line L5 when the first fuel is leaked as described above . Whereby the second fuel stored in the second storage tank 112 is supplied to the engine E so that propulsion of the ship can be continuously performed.

At this time, the second fuel processed through the fuel supply unit 120 may be supplied to the engine E via the valve unit 135 on the second fuel supply line L5. The valve unit 135 may include means for regulating the flow rate of the fuel in accordance with the fuel supply condition of the engine E, for blocking or allowing fuel, for controlling the flow path of the fuel, and the like.

The catalytic reaction part 170 is supported by the pressure of the inert gas supplied to the space S between the inner pipe P 'of the first and second double pipes P1 and P2 and the outer pipe P' The gas component of the leaking first fuel is supplied through the vapor discharge line (L3) and reacted with the catalyst to convert it into a harmless component.

For example, the catalytic reactor 170 may oxidize the gas component of the first fuel using a catalyst to convert it into a harmless component to the human body. In addition, for example, the catalytic reactor 170 can reduce the nitrogen oxide contained in the gas component of the first fuel to a harmless component to the human body by using hydrocarbon as a reducing agent. The gas passing through the catalytic reaction unit 170 can be discharged outboard through the discharge pipe 173.

The liquid component of the first fuel can be collected in the drain tank 113 through the liquid discharge line L4. The liquid component of the first fuel collected in the drain tank 113 can then be discharged outboard.

3, a plurality of partitions 212 may be provided between the inner pipe P 'and the outer pipe P' of the first and second double pipes P1 and P2 described above as another example . At this time, the inert gas supplied from the inert gas supply unit 140 may be supplied to the first space S1 among the spaces defined by the barrier ribs 212. At this time, the inert gas can be continuously supplied while circulating.

As another example, the inert gas may be supplied to the first space S1 only when leakage of the first fuel is suspected. 1, the sensor units 151 and 152 are configured to separate the first fuel leaking between the inner pipe P 'and the outer pipe P' of the first and second double pipes P1 and P2 Detection.

Next, the controller 160 controls the leakage of the first fuel between the inner pipe P 'and the outer pipe P' of the first and second double pipes P1 and P2 by at least one of the sensor units 151 and 152 The inert gas supply unit 140 may be operated to supply the inert gas to the first space S1.

Next, the gas component of the first fuel pushed by the pressure of the inert gas is transferred to the catalytic reaction part 170, and the catalytic reaction part 170 receives the leaking first fuel and reacts with the catalyst to form a harmless component It can be converted and discharged to the outside.

This can prevent, for example, an explosion which may occur when the first fuel leaks between the inner pipe (P ') and the outer pipe (P'), for example, due to cracks in the inner pipe (P '). In addition, the leaked first fuel can be converted into harmless components and discharged safely.

The heating medium may flow in the second space S2 among the spaces defined by the partition walls 212 for heat exchange with the first fuel flowing in the inner pipe P '. At this time, the heating medium of the set temperature may flow in the second space S2 in order to adjust the temperature of the fuel in accordance with the fuel supply condition of the engine E. The heating medium may include, for example, exhaust gas generated by combustion equipment such as propulsion engines for ships, engines for power generation, boilers, and incinerators.

The first space S1 and the second space S2 may be alternately arranged. Thus, the risk of explosion of the first and second double pipes P1 and P2 is prevented and efficient fuel gas supply is performed through the first and second double pipes P1 and P2.

4, the heating wire 214 is wound around the outer surface of the inner pipe P 'of the first and second double pipes P1 and P2 as described above as the fuel supply condition of the engine E The fuel flowing in the inner pipe P 'can be heated accordingly. In this case, the partition wall 212 of FIG. 3 may be omitted, and an inert gas supplied from the inert gas supply unit 140 may be supplied between the inner pipe P 'and the outer pipe P ".

Although not shown, the heat medium flow pipe is provided on the outer surface of the inner pipe P 'of the first and second double pipes P1 and P2 and the high-temperature The heating medium can be flowed through the heat medium flow tube. Similarly, in this case, the partition wall 212 of FIG. 3 may be omitted, and an inert gas supplied from the inert gas supply unit 140 may be supplied between the inner pipe P 'and the outer pipe P ".

On the other hand, a generator 180 connected to the branch line L7 branched from the first double pipe P1 and generating electric power by the first fuel may be provided. The generator 180 can produce electricity by rotating the power shaft using the first fuel supplied to the branch line L7. The generated electricity can be stored or utilized in various facilities of the ship. The branch line L7 may be provided in the form of a double pipe like the first double pipe P1.

At least one of the first and second storage tanks 111 and 112, the fuel supply unit 120, the valve unit 130, and the inert gas supply unit 140 may be disposed on the ship deck, Can be utilized.

5, a fuel supply system 100 for a ship according to another embodiment of the present invention is connected to at least one of the first and second double pipes P1 and P2 through a steam line L8, Temperature steam is supplied to the space S between the inner pipe P 'and the outer pipe P' of the first and second double pipes P1 and P2 at the time of leakage of the fuel, And a steam supply unit 190 for vaporizing the steam. At this time, the valve 190a on the steam line L8 is opened by the control unit 160, and the first fuel vaporized by the high temperature steam is supplied to the catalytic reacting unit 170 and converted into a harmless component to the human body And then discharged outboard. By providing high temperature steam to vaporize and process the leaking first fuel, the drain tank 113 and related configurations L4 and 113a of FIG. 1 described above can be omitted.

The foregoing has shown and described specific embodiments. However, it is to be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the scope of the technical idea of the present invention described in the following claims It will be possible.

111: first storage tank 112: second storage tank
113: drain tank 120: fuel supply unit
130, 135: valve unit 140: inert gas supply unit
151, 152: a sensor unit 160:
170: catalytic reacting section 180: generator
190: steam supply part 212: partition wall
214:

Claims (2)

A storage tank for supplying fuel;
A fuel supply unit for converting the fuel supplied from the storage tank to a fuel supply condition of the engine;
A valve unit for supplying the converted fuel to the engine;
An inert gas supply unit for supplying an inert gas; And
And a double pipe connecting the engine and the valve unit,
Wherein the double pipe includes an inner pipe through which the fuel flows and an outer pipe surrounding the inner pipe with a certain space,
A plurality of partition walls are provided between the inner tube and the outer tube,
The inert gas is supplied from the inert gas supply unit to the first space of the space divided by the partition wall when fuel leaks from the inner tube to the space between the inner tube and the outer tube, Wherein the heat medium flows in the second space of the space for heat exchange with the fuel flowing in the inner tube. The method according to claim 1,
A sensor unit provided in the double pipe and sensing fuel leaked between the inner pipe and the outer pipe,
A control unit for supplying the inert gas to the first space through the inert gas supply unit when the leaked fuel is detected by the sensor unit,
And a catalytic reacting unit that receives the leaked fuel pushed by the pressure of the inert gas supplied to the first space and reacts with the catalyst to convert the leaking fuel into harmless components.

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