Arrangement structure of gas pipeline on large double-island type dual-fuel container ship

Abstract

The utility model discloses an arrangement structure of a gas pipeline on a large-scale double-island type dual-fuel container ship. The arrangement structure comprises a gas preparation pipeline and a gas supply pipeline. The fuel gas preparation pipeline adopts a single-wall pipe, is led out from the fuel cabin, upwards enters a fuel cabin joint, and rightwards enters the fuel gas preparation room; the gas supply pipeline comprises a main engine gas supply pipe, a generator gas supply pipe and a boiler gas supply pipe which extend backwards to the front wall of the engine room along the hatch coaming on the main deck after being led out of the gas preparation room; for a high-pressure main engine, after reaching the front wall of the engine room, a main engine gas supply pipe firstly enters a gas main valve room, and then enters the engine room through a double-wall pipe to be connected with the main engine; for a low-pressure main engine, a main engine gas supply pipe, a generator gas supply pipe and a boiler gas supply pipe, after reaching the front wall of the engine room, the main engine gas supply pipe, the generator gas supply pipe and the boiler gas supply pipe respectively enter the engine room through double-wall pipes, then are connected with the three gas main valve units in a one-to-one correspondence mode and then are connected to the corresponding main engine, generator and boiler. The utility model not only is convenient for construction, but also can reduce danger and investment.

Description

Technical Field

[0001] This utility model relates to the arrangement structure of gas pipelines on a large twin-island dual-fuel container ship. Background Technology

[0002] The engine room 20 and the main gas valve room 20A of the large twin-island dual-fuel container ship are located below the aft island 200 at the stern. The fuel tank 10 and the gas preparation room 12 are located below the forward island 100 amidships, with the gas preparation room located on the starboard side. The entire gas pipeline runs from the fuel tank 10, passes through the equipment in the gas preparation room 12, and then supplies gas to the gas users in the engine room 20 for combustion. The gas users are the main engine 21, generator 22, and boiler 23. Due to the long distance between the forward island 100 and the aft island 200, the safety issues and layout of the gas pipeline crossing the area between the forward island 100 and the aft island 200 have attracted much attention.

[0003] Gas pipelines typically originate from fuel pumps in fuel tank 10, are pressurized / vaporized by relevant equipment in gas preparation room 12, and then enter gas buffer tanks. From gas preparation room 12, the gas pipelines flow through main engine gas main valve room 20A to engine room 20 and then to main engine 21 (high-pressure main engine), or to gas main valve unit 20B in engine room 20 and then to main engine 21 (low-pressure main engine), or directly into engine room 20 to generator 22 and boiler 23. For complete gas pipelines, double-walled pipes are typically used in engine room 20, while single-walled pipes are generally used between fuel tank 10 and fuel preparation room 12.

[0004] The conventional arrangement for the gas supply lines 210, 220, and 230, which extend from the fuel preparation room 12 into the engine room 20, is to extend them along the isolation compartment 10A below the fuel tank 10 into the double bottom pipe tunnel 10B of the ship, and then into the engine room 20. Because the gas supply lines are located in the enclosed area of ​​the double bottom pipe tunnel 10B, according to classification society regulations, the gas supply lines crossing the double bottom pipe tunnel 10B area need to adopt a double-walled pipe structure, and due to the hazardous nature of the gas supply lines, butt-welded connections are used.

[0005] In terms of construction: the pipes in the double-layered bottom pipe alley are dense and the space is relatively small, which not only makes it inconvenient to lay and weld gas supply pipes, but also makes it inconvenient to inspect the welds by radiography.

[0006] In terms of economics: the double-walled pipe structure requires a ventilator 30 for forced ventilation; considering the smaller annular space of the double-walled pipe and the greater airflow resistance, the pressure and capacity selection parameters of the ventilator 30 need to be increased, thereby increasing the energy consumption of the ship's electrical grid. Furthermore, the double-walled pipe structure itself is more expensive. In case of ventilator failure, shutdown and maintenance are required, increasing the risk of malfunction during operation and affecting gas users.

[0007] In terms of safety: In the event of a leak in a double-walled pipe, it is relatively difficult to handle hazardous gases in the enclosed area, and natural compensation is also relatively difficult. Using expansion joints for compensation increases the risk of leakage. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gas pipeline layout structure for a large double-island dual-fuel container ship, which not only facilitates construction but also reduces danger and investment.

[0009] The purpose of this utility model is achieved as follows: a gas pipeline layout structure for a large twin-island dual-fuel container ship, including an engine room located below the main deck of the aft island at the stern of the hull, gas users located in the engine room, and a fuel tank located below the main deck of the fore island in the middle of the hull; the gas users include main engines, generators, and boilers; a fuel tank connection location located amidships and a gas preparation room located on the main deck at the bottom of the fore island are provided; for low-pressure main engines, three gas main valve units are provided in the engine room; for high-pressure main engines, a gas main valve room is provided on the main deck at the bottom of the aft island, and two gas main valve units are provided in the engine room;

[0010] The gas pipeline includes a gas pipeline construction system and a user gas supply pipeline; wherein...

[0011] The gas preparation pipeline is a single-walled pipe that extends from the fuel tank and enters the fuel tank connection point, then turns right into the gas preparation room, where the gas preparation room prepares the gas required by the main unit, generator and boiler.

[0012] The user gas supply pipeline includes a main engine gas supply pipeline, a generator gas supply pipeline, and a boiler gas supply pipeline extending from the gas preparation room. These pipelines extend aft along the hatch cofferdam on the main deck to the forward wall of the engine room. For high-pressure main engines, after reaching the forward wall of the engine room, the main engine gas supply pipeline first enters the main gas valve room, then uses a double-walled pipe to enter the engine room and connects to the main engine. Similarly, after reaching the forward wall of the engine room, the generator gas supply pipeline and the boiler gas supply pipeline each use double-walled pipes to directly enter the engine room, then connect to two corresponding main gas valve units, and finally to the corresponding generator and boiler. For low-pressure main engines, after reaching the forward wall of the engine room, the main engine gas supply pipeline, generator gas supply pipeline, and boiler gas supply pipeline each use double-walled pipes to enter the engine room, then connect to three corresponding main gas valve units, and finally to the corresponding main engine, generator, and boiler.

[0013] The gas pipeline layout structure of the aforementioned large twin-island dual-fuel container ship includes a main engine gas preparation unit and a generator boiler gas preparation unit located in the gas preparation room.

[0014] In the above-mentioned arrangement of gas pipelines on a large twin-island dual-fuel container ship, the main gas valve room for the high-pressure main engine is located on the right side of the hull.

[0015] The above-mentioned gas pipeline layout structure of the large twin-island dual-fuel container ship includes the main engine gas supply pipe and the generator gas supply pipe extending rearward along the right side hatch cofferdam of the main deck to the forward wall of the engine room; the boiler gas supply pipe extending rearward along the left side hatch cofferdam of the main deck to the forward wall of the engine room, and then extending to the right to enter the engine room. The main engine gas supply pipe, generator gas supply pipe and boiler gas supply pipe on the main deck are single-wall pipes.

[0016] In the above-mentioned layout of gas pipelines on large twin-island dual-fuel container ships, the number of generators among the gas users is 1 to 4.

[0017] The gas pipeline layout structure of this utility model on a large double-island dual-fuel container ship has the following characteristics:

[0018] 1. Changing the user air supply pipe between the fore island and the aft island from a double-walled pipe to a single-walled pipe reduces investment, production and installation costs, and eliminates the need for a ventilator. This reduces investment costs for ventilation configurations and lowers the power consumption costs of the ship's subsequent operation, thus improving economic efficiency.

[0019] 2. The gas supply pipeline between the fore and aft islands was moved from being located within the pipe tunnel to being located on the main deck, increasing the convenience of construction. Furthermore, the gas supply pipeline on the main deck is more flexible and adaptable to the ship's hatch coaming structure, improving the pipeline's flexibility through natural compensation and optimizing the layout structure. In the event of a gas leak in the pipeline, it can spread rapidly, reducing the danger. Attached Figure Description

[0020] Figure 1 This is a side view of the gas pipeline layout structure on a large, twin-island, dual-fuel container ship in the prior art;

[0021] Figure 1a This is a top view of the gas pipeline layout structure on a large, twin-island, dual-fuel container ship in the existing technology.

[0022] Figure 1b yes Figure 1 AA direction view in the middle;

[0023] Figure 2 This is a side view of the gas pipeline layout structure on a large, twin-island, dual-fuel container ship, which is a utility model.

[0024] Figure 3 This is a top view of the gas pipeline layout structure on a large, twin-island, dual-fuel container ship, which is a utility model.

[0025] Figure 4 yes Figure 2 BB view in the middle. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Please see Figures 2 to 4 The present invention discloses the gas pipeline layout structure of a large twin-island dual-fuel container ship, comprising an engine room 20 located below the main deck of the aft island 200 at the stern, gas users located within the engine room 20, and a fuel tank 10 located below the main deck of the fore island 100 amidships. The gas users include a main engine 21, a generator 22, and a boiler 23, with one to four generators. A fuel tank connection point 11 located amidships and a gas preparation room 12 located on the starboard side of the main deck at the bottom of the fore island 100 (above the fuel tank 10) are provided. For low-pressure main engines, three gas main valve units 24 are provided within the engine room 20; for high-pressure main engines, a gas main valve room 25 is provided on the main deck at the bottom of the aft island 200 (above the engine room 20), located on the starboard side of the hull, and two gas main valve units 24 are provided within the engine room 20. The gas main valve units 24 are fully enclosed modular structures; the gas main valve room 25 is an exposed structure.

[0028] Gas pipelines include the construction of gas pipelines and the gas supply pipelines to users; among which,

[0029] After the gas preparation pipeline is led out from the fuel tank 10, it goes up into the fuel tank connection location 11, and then to the right into the gas preparation room 12. The gas required by the main engine gas preparation unit 121 in the gas preparation room 12 is prepared by the main engine 21, and the gas required by the generator boiler gas preparation unit 122 in the gas preparation room 12 is prepared by the generator 22 and the boiler 23.

[0030] The user gas supply pipeline includes a main engine gas supply pipe 210, a generator gas supply pipe 220, and a boiler gas supply pipe 230 extending from the gas preparation room 12. The main engine gas supply pipe 210 and the generator gas supply pipe 220 extend rearward along the starboard hatch coaming 30 on the main deck to the forward wall 20A of the engine room; the boiler gas supply pipe 230 extends rearward along the left hatch coaming 30 on the main deck to the forward wall 20A of the engine room; the main engine gas supply pipe 210, the generator gas supply pipe 220, and the boiler gas supply pipe 230 on the main deck are single-walled pipes.

[0031] For the high-pressure main unit, after the main unit gas supply pipe 210 reaches the front wall 20A of the nacelle, it first enters the gas main valve room 25, and then enters the nacelle 20 through a double-wall pipe and connects to the main unit 21. After the generator gas supply pipe 220 reaches the front wall 20A of the nacelle, it enters the nacelle 20 through a double-wall pipe. After the boiler gas supply pipe 230 reaches the front wall 20A of the nacelle, it extends to the right and then enters the nacelle 20 through a double-wall pipe. Then the generator gas supply pipe 220 and the boiler gas supply pipe 230 are connected to the two gas main valve units 24 one by one, and then connected to the corresponding generator 22 and boiler 23.

[0032] For the low-pressure main unit, after the main unit gas supply pipe 210 and the generator gas supply pipe 220 reach the front wall 20A of the nacelle, they each enter the nacelle 20 through double-wall pipes. After the boiler gas supply pipe 230 reaches the front wall 20A of the nacelle, it extends to the right and then enters the nacelle 20 through double-wall pipes. Then, the main unit gas supply pipe 210, the generator gas supply pipe 220 and the boiler gas supply pipe 230 are connected to the three gas main valve units 24 one by one, and then connected to the corresponding main unit 21, generator 22 and boiler 23.

[0033] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A gas pipeline layout structure for a large twin-island dual-fuel container ship, comprising an engine room located below the main deck of the aft island at the stern of the hull, gas users located within the engine room, and a fuel tank located below the main deck of the fore island amidships; the gas users include a main engine, a generator, and a boiler; a fuel tank connection location located amidships and a gas preparation room located on the main deck below the fore island are provided; for low-pressure main engines, three gas main valve units are provided in the engine room; for high-pressure main engines, a gas main valve room is provided on the main deck below the aft island, and two gas main valve units are provided in the engine room; The gas pipeline includes a gas pipeline preparation line and a user gas supply line; characterized in that... The gas preparation pipeline is a single-walled pipe that extends from the fuel tank and enters the fuel tank connection point, then turns right into the gas preparation room, where the gas preparation room prepares the gas required by the main unit, generator and boiler. The user gas supply pipeline includes a main engine gas supply pipeline, a generator gas supply pipeline, and a boiler gas supply pipeline extending from the gas preparation room. These pipelines extend aft along the hatch cofferdam on the main deck to the forward wall of the engine room. For high-pressure main engines, after reaching the forward wall of the engine room, the main engine gas supply pipeline first enters the main gas valve room, then uses a double-walled pipe to enter the engine room and connects to the main engine. Similarly, after reaching the forward wall of the engine room, the generator gas supply pipeline and the boiler gas supply pipeline each use double-walled pipes to directly enter the engine room, then connect to two corresponding main gas valve units, and finally to the corresponding generator and boiler. For low-pressure main engines, after reaching the forward wall of the engine room, the main engine gas supply pipeline, generator gas supply pipeline, and boiler gas supply pipeline each use double-walled pipes to enter the engine room, then connect to three corresponding main gas valve units, and finally to the corresponding main engine, generator, and boiler.

2. The arrangement structure of gas pipelines on a large twin-island dual-fuel container ship according to claim 1, characterized in that, The gas preparation room is equipped with a main engine gas preparation unit and a generator boiler gas preparation unit.

3. The gas pipeline layout structure on a large twin-island dual-fuel container ship according to claim 1, characterized in that, For the high-pressure main engine, the gas main valve room is located on the starboard side of the hull.

4. The arrangement structure of the gas pipeline on a large twin-island dual-fuel container ship according to claim 1, characterized in that, The main engine gas supply pipe and the generator gas supply pipe extend rearward along the right side of the main deck hatch cofferdam to the forward wall of the engine room; the boiler gas supply pipe extends rearward along the left side of the main deck hatch cofferdam to the forward wall of the engine room, and then extends to the right and enters the engine room. The main engine gas supply pipe, the generator gas supply pipe and the boiler gas supply pipe on the main deck are single-wall pipes.

5. The arrangement structure of the gas pipeline on a large twin-island dual-fuel container ship according to claim 1, characterized in that, The number of generators in the gas users is between 1 and 4.

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