KR101436972B1 - Apparatus for Extinguishing Fire of the Surface of the Sea and Method for Extinguishing Fire Using the Same - Google Patents

Abstract

The present invention relates to a sea surface fire extinguishing apparatus for an offshore plant which promptly and reliably extinguishes a fire on a lower sea surface side of the offshore plant such as a drill ship during an early stage of the fire to prevent physical and human damage to the offshore plant attributable to the sea surface fire; and a fire extinguishing method using the same. According to the present invention, the sea surface fire extinguishing apparatus for an offshore plant includes: a barrier wall body disposed to be capable of moving upwards and downwards in the offshore plant, and is moved to an upper side or a lower side in the event of a fire on a sea surface on a lower side of the offshore plant to surround and seal the sea surface on the lower side of the offshore plant; a fire extinguishing nozzle which ejects a fire extinguishing agent to the sea surface surround by the barrier wall body; lifting/lowering means to lift/lower the barrier wall body with respect to the offshore plant; and fire extinguishing agent supply means to supply the fire extinguishing agent to the fire extinguishing nozzle.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an off-shore fire suppression apparatus for an offshore plant and a fire suppression method using the same,

FIELD OF THE INVENTION The present invention relates to an apparatus and method for suppressing a fire generated from a sea surface under an offshore plant, and more particularly, to an apparatus and method for suppressing a fire generated from a sea surface of an offshore plant such as a petroleum drill rig or gas drill ship, The present invention relates to an apparatus for suppressing a sea surface fire of an offshore plant and a fire suppression method using the same.

The drilling rig equipped with various drilling equipment to drill oil and gas existing in the basement of the sea floor can develop a more stable well as the fluctuation and position change due to algae, wind direction, wind speed and digging are smaller, When a well is developed in a remote place where it can not actively receive support from the user, a system should be established to safely protect various equipment and workers from the risk of unexpected fire, flooding, and gas explosion.

Accordingly, various offshore plants such as drill ships have fire extinguishing systems that can prepare for various fires occurring in the offshore plant itself.

On the other hand, when flammable or flammable fluid (crude oil or natural gas) is ejected from the sea floor to the sea surface due to various factors such as drilling pipe leaking or drilling drill error during drilling, this flammable fluid may cause static electricity or mechanical sparks, In some cases, a source of ignition is generated by a heat source generated during operation, resulting in a fire. Such a sea surface fire causes various problems as follows.

1. There is a danger that the flame will spread over the entire offshore plant due to sea surface fire and collapse into the sea floor.

2. If the fire spreads throughout the facility and the rescue helicopter does not come,

3. Significant property loss when submerged (minimum of 5 trillion won for drill ship)

4. For anthropogenic firefighting, operators must go to the sea surface and operate a fire extinguishing agent (FOAM) that is adaptive to oil fires to suppress the fire. In this case, there is a risk of fire suppression procedures and a risk of falling into the sea during preparation

Worldwide, serious fires in this fire occurred on April 20, 2010 in Deepwater Horizon fires in the Gulf of Gulf, USA, where hydrocarbon steam formed by jetting out from the seabed wellbore and blowout preventer (BOP) , The POOL fire was formed on the surface of the sea. However, 11 people were killed and 17 people were injured due to the lack of fire fighting equipment. The fire lasted for 36 hours and the drill ship sank into the sea.

Conventional offshore plants are only constructed with fire extinguishing systems that can prepare themselves for fire. However, as described above, there is no fire extinguishing system capable of suppressing the fire generated from the lower sea surface of the offshore plant. there is a problem. Especially in the sea, because of the water flow, the fire area expands rapidly, so it is impossible for a person to approach the fire source directly and to suppress the fire.

Japanese Patent Application Laid-Open No. 6-277310: Marine fire extinguishing system

In order to accomplish the above object, the present invention is to prevent the damage of the offshore plant due to the fire of the sea surface and the loss of human life by quickly and reliably extinguishing the fire in the early stage when a fire occurs in the lower sea surface of an offshore plant such as an oil drilling ship. And a fire suppression method using the same.

In order to accomplish the above object, according to the present invention, there is provided a sea surface fire suppression device for an offshore plant, which is installed on a marine plant so as to be movable up and down, moves from the lower sea surface of a marine plant to an upper side or a lower side, A wall enclosing and enclosing the sea surface; A fire extinguishing nozzle for discharging the fire extinguishing agent to the sponge surrounded by the wall; A lifting means for lifting the wall body up and down with respect to the offshore plant; And an extinguishing agent supply means for supplying the extinguishing agent to the extinguishing nozzle.

Also, the method for suppressing the fire of a marine plant according to the present invention comprises the steps of: (a) detecting a fire on a lower surface of an offshore plant; (b) releasing the extinguishing agent onto the sponge; (c) moving the wall to the sea surface so as to surround the lower sea surface of the offshore plant.

According to the present invention, when a fire occurs in the lower sea surface of an offshore plant, a fire extinguishing agent in the form of foam is discharged through the fire extinguishing nozzle to the inside of the wall wall, and the wall wall moves to the sea surface, The fire can be suppressed quickly and effectively.

In addition, since the wall serves as an oil fence, the oil does not flow out to the outside by the wall, thereby preventing environmental pollution due to oil leakage.

1 is a front view schematically showing a sea surface fire suppression apparatus of an offshore plant according to a first embodiment of the present invention.
2 is a front view showing an operation example of the sea surface fire suppression apparatus of FIG.
3 is a plan view of the sea surface fire suppression device of FIG.
4 is a block diagram showing the configuration of extinguishing agent supply means constituting the sponge fire suppression apparatus of the present invention.
5 is a flowchart illustrating a method of suppressing a sea surface fire according to the present invention.
6 is a front view schematically showing a sea surface fire suppression apparatus of a marine plant according to a second embodiment of the present invention.
7 is a front view schematically showing a sea surface fire suppression apparatus of a marine plant according to a third embodiment of the present invention.
8 is a front view schematically showing a sea surface fire suppression device of a marine plant according to a fourth embodiment of the present invention.
9 is a front view schematically showing a sea surface fire suppression device of a marine plant according to a fifth embodiment of the present invention.
10 is a front view schematically showing a sea surface fire suppression apparatus for an offshore plant according to a sixth embodiment of the present invention.
11 and 12 are front views schematically showing a sea surface fire suppression apparatus of an offshore plant according to a seventh embodiment of the present invention.
13 is a front view schematically showing a sea surface fire suppression device of an offshore plant according to a seventh embodiment of the present invention.
14 is a front view showing an operation example of the sea surface fire suppression apparatus of FIG.
Fig. 15 is a longitudinal sectional view showing a substantial part of the wall structure of the sea surface fire suppression device of Fig. 13;
16 is a front view showing a modified embodiment of the sea surface fire suppression device of the offshore plant of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show a first embodiment of a sea surface fire suppression apparatus for an offshore plant according to the present invention. 1 to 3, the sponge fire suppression apparatus of this embodiment is installed on the offshore plant 1 so as to be movable up and down, moves upward on the lower sea surface of the offshore plant 1, A fire extinguishing nozzle 20 installed in the offshore plant 1 for discharging fire extinguishing agent to the sea surface surrounded by the wall 10, And a fire extinguishing agent supply means for supplying fire extinguishing agent to the fire extinguishing nozzle 20. The fire extinguishing means 20 includes a fire extinguishing means 20,

In this embodiment, the wall 10 has a circular ring shape in which upper and lower surfaces are opened. Of course, in this embodiment, the wall 10 is illustrated as a circular ring, but it may be a polygonal ring such as an ellipse, a rectangle, or a hexagon. The wall 10 is made of an excellent fire-resistant material capable of enduring fire, for example, a metal material, or a nonflammable or flame-retardant plastic.

As shown in FIG. 2, when the fire is generated, the wall 10 is elevated to a predetermined height by the elevating means, and the lower side of the marine plant 1 It completely shields the sea surface, shields the flow of seawater, blocks the spread of the fire to the outer area of the offshore plant, and concentrates the extinguishing agent inside the wall 10. In addition, since the wall 10 functions as an oil fence, the oil does not flow out to the outside by the wall, so that it is possible to prevent environmental pollution due to oil leakage.

In this embodiment, the elevating means comprises a plurality of chains 31, one end of which is connected to the wall 10, and the other end of the chain 10, A plurality of chain spools 32 rotatably installed on the respective chain spools 32 to wind the chains 31 and a driving motor 33 for rotating the respective chain spools 32. When the elevating means is constituted by the chain 31, the chain spool 32 and the drive motor 33 as in this embodiment, there is an advantage that the wall 10 can be quickly and easily lifted and lowered with a simple structure .

The fire extinguishing nozzle 20 may be arranged at any position of the offshore plant 1 in accordance with the structure of the offshore plant 1 and may be arranged under the platform 2 of the offshore plant 1 as in this embodiment One or more of which may be vertically extended downwardly to emit an extinguishing agent directly into the lower chamber.

As shown in FIG. 4, the fire extinguishing agent supply means for supplying fire extinguishing agent to the fire extinguishing nozzle 20 when a fire occurs includes a seawater pump 43 for pumping seawater, a foam storage tank 43 containing foam stock solution for fire extinguishing, A foam pump 45 for pumping the foam stock solution of the foam storage tank 44 by the seawater pump 43 and the foam pump 45 by means of the foam pump 45, And a mixer 46 for mixing the foam stock solution supplied from the mixer 46. The mixer 46 is connected to the fire extinguishing nozzle 20 through a supply pipe to supply the foam-seawater mixed liquid to the fire extinguishing nozzle 20.

The controller 42 activates the seawater pump 43 and the foam pump 45 to supply the seawater and the foam stock solution to the mixer 46 And the mixed liquid mixed in the mixer 46 is supplied to the fire extinguishing nozzle 20. In this case,

If the extinguishing agent supply means is constructed as in this embodiment, the foam can be generated by using the seawater, so there is an advantage that the seawater can be used immediately without having to separately provide the extinguishing water.

The fire detection unit 41 may be constructed by applying a known fire detection sensor, a temperature sensor, a sealed sprinkler, or the like. The fire detection unit 41 may be installed in a structure of the marine platform 2 close to the sea surface, for example, a support column 3.

The method of suppressing the fire of the sea surface using the sea surface fire suppression device of the present invention constructed as above will be described with reference to FIG.

Normally, the wall 10 maintains a locked state at a predetermined level below the sea surface. When a fire occurs in the lower sea surface of the offshore plant 1 for some reason during the drilling process, the fire detection unit 41 senses a fire and transmits it to the controller 42 (step S1).

The controller 42 activates the extinguishing agent supply means to supply the seawater and the foam stock solution to the mixer 46 (step S2). The mixed seawater-foam mixture in the mixer 46 is supplied to the extinguishing nozzle 20, and the extinguishing agent in the form of foam is discharged to the sea surface through the extinguishing nozzle 20 to extinguish the fire.

At this time, the controller 42 automatically applies power to the driving motor 33 of the elevating means to rotate the chain spool 32, or notifies the crew of the occurrence of the fire, so that the crew manually operates the elevating means The motor 33 is operated to rotate the chain spool 32. When the chain spool 32 rotates and the chain 31 is wound on the chain spool 32, the wall 10 ascends and surrounds the lower sea surface of the offshore plant (step S4). In this way, when the wall 10 surrounds the sea surface in the event of a sea surface fire, the extinguishing agent discharged from the fire extinguishing nozzle 20 is concentrated on the inside of the wall 10 without spreading, so that the fire can be suppressed quickly and reliably. After the fire suppression, the fire extinguishing agent and oil released on the sea surface stay inside the wall 10, so that the fire extinguishing agent and the oil can be easily removed.

In the embodiment described above, the fire extinguishing nozzle 20 is installed so as to extend directly below the center portion of the platform 2 of the offshore plant 1. However, as shown in another embodiment in Fig. 6, It may be configured to be inclined downwardly inward at the edge portion of the wall 10 to release the extinguishing agent in an inclined direction toward the sea surface inside the wall 10.

Or as shown in Fig. 7, the fire extinguishing nozzle 20 is formed in a substantially 'J' shape and is installed to extend downwardly to the platform 2 of the offshore plant 1 while the lower end is submerged below the sea surface The tip may be located adjacent the sponge and configured to release the extinguishing agent onto the sponge via the tip. The fire extinguishing nozzle 20 may be installed at any position such as a central portion and / or a corner portion of the offshore plant 1.

8, the fire extinguishing nozzle 20 may be installed in the support column 3 provided at the four corners of the offshore plant 1. [

As described above, the fire extinguishing nozzle 20 is installed in any structure of the offshore plant 1 and emits the fire extinguishing agent onto the sea surface surrounded by the shell 10 to suppress the sea surface fire.

However, as shown in FIG. 9, the fire extinguishing nozzle 20 may be installed in the wall 10 to release the extinguishing agent toward the inside space of the wall 10. In this embodiment, the fire extinguishing nozzle 20 is connected to the header 47 provided at the upper end of the wall 10 to receive the extinguishing agent in foam form from the extinguishing agent supply means through the flexible supply pipe 48.

Meanwhile, in the above-described embodiments, the sponge fire suppression devices of the above-described embodiments are constructed such that the wall 10 is installed below the sea surface and rises when the fire occurs to surround the sea surface. Alternatively, however, It is installed on the upper side, and when fire occurs, it may be lowered to the level of the sea surface, and the sea surface may be surrounded and shielded.

For example, as shown in yet another embodiment in Fig. 10, the wall 10 is installed just below the platform 2 of the offshore plant 1, and when the fire occurs, Is lowered to the level of the sea surface to shield the sea surface.

In this embodiment, the elevating means comprises a plurality of chains 31, one end of which is connected to the wall 10, as in the above-described embodiments, and a plurality of chains 31, which are rotatably installed on the offshore plant 1, A plurality of chain spools 32 for winding the respective chain spools 32 and a driving motor 33 for rotating the respective chain spools 32.

Alternatively, as shown in Figs. 11 and 12, the wall 10 is suspended by the fastening means 35, just below the platform 2 of the offshore plant 1, When the separation wall 10 is separated, it may fall down to the sea surface to fall freely and surround the lower sea surface of the offshore plant. At this time, it is preferable to additionally provide a bucket 60 for providing buoyancy to the wall 10 so that the bucket 10 does not sink below the sea level.

Of course, in this embodiment, the ring 35 is illustrated as the fixing means for detachably fixing the wall 10 to the offshore plant 1. Alternatively, the ring 35 may be formed of a magnetic material such as a magnet, a clamp, You can do it.

13 to 15 illustrate another embodiment in which the wall 10 is installed on the upper side of the offshore plant 1. In this embodiment, the wall 10 is constructed such that the upper and lower ends thereof are rotatable relative to each other And a plurality of shutter plates 11 connected to each other and capable of being folded and folded vertically up and down on the four edges of the platform 2 of the offshore plant 1. [ The elevating means for elevating and lowering each of the wall blocks 10 constituted by the shutter plate 11 is a cylindrical type in which the shutter plate 11 is rotatably installed at each edge portion of the offshore plant 1 A shutter spool 15, and a drive motor (not shown) for rotating the shutter spool 15.

Accordingly, when the shutter spool 15 is rotated by the operation of the driving motor 33, the shutter plate 11 is released from the shutter spool 15 and descends to surround and cover the sponge (see FIG. 14).

16, in order to smoothly move up and down the wall 10 when the wall 10 of the shutter structure is raised and lowered, four corners of the platform 2 of the offshore plant 1 A guide member 50 for guiding the movement of the wall 10 may be installed so as to extend vertically. The guide member 50 has guide grooves 51 in which both end portions of the wall 10 are inserted and guided.

Accordingly, when the wall 10 is lowered, both end portions of the wall 10 are guided by the guide member 50 and smoothly descend.

The fire extinguishing nozzle 20 can be installed in the off-shore plant 1 in the same manner as in the embodiments shown in Figs. 1, 6 to 9, even when the wall 10 is constructed on the upper side of the off- Or a structure of the wall 10.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

1: Offshore Plant 2: Platform
3: Support column 10:
11: shutter plate 15: shutter spool
20: fire extinguishing nozzle 31: chain
32: chain spool 33: drive motor
41: fire detection unit 42: controller
43: Seawater pump 44: Foam storage tank
45: foam pump 46: mixer
50: guide member 51: guide groove

Claims (15)

Metal or non-flammable or flame-retardant plastic and is formed into a circular or polygonal ring shape with open upper and lower surfaces and is provided to be movable up and down on the offshore plant 1, (10) which moves upward or downward when a fire occurs and surrounds the lower sea surface of the offshore plant and shields the same;
An extinguishing nozzle (20) for discharging the extinguishing agent to the sponge surrounded by the wall (10);
Lifting means for lifting the wall 10 up and down with respect to the offshore plant 1;
And an extinguishing agent supply means for supplying the extinguishing agent to the extinguishing nozzle (20). 2. The marine vessel as claimed in claim 1, wherein the wall (10) is normally submerged below the sea surface of the offshore plant (1) and ascends to the sea surface by the elevating means Fire suppression device. [3] The apparatus according to claim 2, wherein the lifting means comprises a plurality of chains (31) one end of which is connected to the wall (10), and a plurality of chains Comprises a plurality of chain spools (32), and a drive motor (33) for rotating the respective chain spools (32). 2. The marine plant according to claim 1, characterized in that the wall (10) is normally spaced apart from the sea surface at the upper side of the offshore plant (1) and descends to the sea surface by the elevating means Of the sea surface fire suppression device. The apparatus as claimed in claim 4, wherein the barrier wall (10) is composed of a plurality of shutter plates (11) capable of folding and connecting the upper end portion and the lower end portion so as to be rotatable relative to each other. The apparatus according to claim 5, wherein the elevating means comprises: a cylindrical shutter spool (15) rotatably installed at each edge of the offshore plant (1) and on which the shutter plate (11) And a drive motor for rotating the marine plant. [3] The water treatment system according to claim 1, wherein vertically extending portions are provided at four corners of the offshore plant (1), and each corner of the wall body (10) is movably connected to guide the wall body And a guide member (50) for guiding the fire of the marine plant. [Claim 2] The fire extinguisher according to claim 1, wherein the fire extinguishing nozzle (20) is formed in a 'J' shape and extends downwardly to the offshore plant (1) so that the lower end is submerged below the sea surface and the distal end is positioned adjacent to the sea surface Wherein the fire extinguishing agent is discharged onto the surface of the sea through the tip of the fire extinguisher. The apparatus as claimed in claim 1, wherein the fire extinguishing nozzle (20) is installed on the wall (10). The method according to claim 9, further comprising: a foam storage tank (44) containing the extinguishing agent supply means, a foam stock solution for fire extinguishing, and a foam raw material supplied from the foam storage tank (44) A mixer 46 and a header 47 connected to the fire extinguishing nozzle 20 and receiving foam-seawater mixture from the mixer 46 through a supply pipe 48 installed in the wall 10 Wherein the control unit is operable to control the operation of the control unit. 2. The apparatus according to claim 1, wherein the extinguishing agent supply means comprises: a foam storage tank (44) containing a foam stock solution for fire extinguishing; and a foam stock solution tank (44) And a mixer (46) for making the surface of the offshore plant. Metal or non-flammable or flame-retardant plastic and is formed into a circular or polygonal ring shape having open top and bottom faces and is freely dropable on the offshore plant 1, (10) for shielding the lower surface of the offshore plant while surrounding the lower surface of the offshore plant;
An extinguishing nozzle (20) for discharging the extinguishing agent to the sponge surrounded by the wall (10);
Fixing means for detachably fixing the wall 10 to an upper side of the offshore plant 1;
And an extinguishing agent supply means for supplying the extinguishing agent to the extinguishing nozzle (20). The apparatus as claimed in claim 12, further comprising a port (60) provided on the wall (10) to provide buoyancy to prevent the wall (10) . 14. A method of suppressing a sea surface fire in an offshore plant using a sea surface fire suppression device of an offshore plant according to any one of claims 1 to 13,
(a) detecting a fire on the underside of the offshore plant;
(b) releasing the extinguishing agent onto the sponge;
(c) covering the bottom wall of the offshore plant while shielding the wall 10 in the form of a circular or polygonal ring with its top and bottom openings moving upward or downward, Method of suppressing the sea surface fire of a plant. 15. The method of claim 14, wherein the step (c) comprises mixing the foamed stock solution for digestion with the seawater at a preset ratio, pumping the mixed foam-seawater mixture to the digestion nozzle (20) ≪ / RTI > further comprising the steps of:

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