CN116279974A

CN116279974A - Fuel storage cabin and container ship

Info

Publication number: CN116279974A
Application number: CN202310055568.2A
Authority: CN
Inventors: 柳梦源; 梁秋凤; 蔡乾亚; 朱岚劼; 缪爱琴; 郑双燕; 余洋
Original assignee: Jiangnan Shipyard Group Co Ltd
Current assignee: Jiangnan Shipyard Group Co Ltd
Priority date: 2023-01-16
Filing date: 2023-01-16
Publication date: 2023-06-23

Abstract

The invention provides a fuel storage cabin and a container ship, wherein the fuel storage cabin is divided into a plurality of cabins along the ship width direction by a corrugated partition board, the fuel storage cabin can select one of methanol and fuel oil for storage, different fuels can be loaded according to the actual demand of a shipper, and the flexibility of the fuel storage cabin is improved. The corrugated partition plate has a continuous corrugated structure in the ship length direction, thereby enhancing the structural strength of the corrugated partition plate. For a container ship, the methanol fuel filling station is arranged above the fuel storage cabin, so that the filling path of the methanol fuel is shortened as much as possible; the methanol fuel equipment room is arranged above the fuel storage cabin, so that the space inside and the middle deck of the container ship are fully utilized; the daily cabin of the methanol fuel and the methanol fuel treatment room are arranged above the cabin area, so that the pipeline arrangement from the fuel treatment room to the cabin area where the main propulsion system is positioned is optimized, the safety of the cabin is improved, and meanwhile, the construction cost of the ship is saved.

Description

Fuel storage cabin and container ship

Technical Field

The invention relates to the technical field of ship construction, in particular to a fuel storage cabin and a container ship.

Background

With the increasing urgency of emission reduction pressure of ships in the years, the shipping industry speeds up exploration of clean fuel application, and methanol fuel has become a focus of attention in the shipping industry due to the advantages of environmental protection, economy, availability and the like. The International Maritime Organization (IMO) formally passed the safety guidelines for methanol as a marine fuel in 2020, which is the second approved alternative fuel following LNG in the field of low flash point fuels. Methanol is a clean, efficient and low-carbon liquid fuel, is easy to store and transport, does not need to be provided with an expensive low-temperature fuel storage tank and a natural gas treatment system, is lower in construction cost than an LNG ship, is used for marine fuel, positively adjusts the existing energy structure to a great extent, and is beneficial to achieving the aim of reducing greenhouse gas emission.

Therefore, there is a need to propose a storage tank and container ship for methanol storage.

Disclosure of Invention

The invention aims to provide a fuel storage cabin capable of storing methanol fuel and a container ship total arrangement structure, which provide a new thought for the total arrangement structure of a dual-fuel ship, are suitable for different route voyage requirements of the container ship, optimize the structure and arrangement of the fuel storage cabin, effectively utilize the inner space of the container ship, realize the diversification of the loading of the fuel storage cabin and not lose cargo space.

To achieve the above and other related objects, the present invention provides a fuel storage tank divided by a corrugated partition plate into a plurality of tanks arranged in a ship width direction;

the fuel storage cabin is used for storing methanol or fuel oil; when the fuel storage cabin is used for storing fuel, the inner surface of the cabin wall is also covered with a fuel cabin inner membrane, and a heating device is also arranged in the cabin;

the inner wall of the fuel storage cabin further comprises an anti-corrosion coating which can directly store methanol, and the fuel storage cabin is surrounded by the isolation empty cabin in an inverted U shape so as to protect the fuel storage cabin.

Preferably, the corrugated partition plate is provided with a continuous corrugated structure along the ship length direction, so that the structural strength of the corrugated partition plate is enhanced, the cross section of each wave crest and each wave trough of the corrugated structure is trapezoidal, the wave crests and the wave troughs are connected with a longitudinal strong structure at the bottom of the ship body, and the structural strength of the corrugated partition plate is further improved.

The present invention also provides a container ship comprising:

a main deck below which the fuel storage tank of any of claims 1-2 is located at the hull forward section;

the cabin is arranged below the main deck and positioned at the rear section of the ship body and is used for providing power;

the cabin shed is arranged above the main deck and is used for ventilating the cabin;

the methanol fuel daily cabin and the methanol fuel treatment room are adjacently arranged and are positioned above the cabin, methanol from the fuel storage cabin is sequentially conveyed to the methanol fuel daily cabin and the methanol fuel treatment room through a methanol fuel pipeline, the methanol fuel in the fuel storage cabin is required to be pumped out through a methanol fuel pump, reaches the methanol fuel daily cabin through a methanol fuel pipeline system and rotates, and is conveyed to the cabin where the main propulsion system is positioned along the methanol fuel pipeline after being treated by the methanol fuel treatment room.

The fuel daily cabin is positioned at the inner front part of the cabin, when the fuel storage cabin is used for storing fuel, the fuel in the fuel storage cabin reaches the fuel daily cabin through the fuel pipeline system, and the fuel in the fuel daily cabin is conveyed to the main propulsion system in the cabin along the fuel pipeline.

Preferably, the container ship further comprises a methanol fuel equipment room, the methanol fuel equipment room is arranged above the fuel storage cabin, the nitrogen generation room is arranged near the methanol fuel equipment room and above the fuel storage cabin, methanol fuel filling stations are respectively arranged on the left side and the right side of the methanol fuel equipment room and the nitrogen generation room, and the methanol fuel filling stations are used for conveying methanol fuel from a wharf or a floating device to the ship in the fuel storage cabin.

Preferably, the methanol fuel pipeline is divided into a single-pipe wall section and a double-pipe wall section, wherein the single-pipe wall section passes through a region below a hatch coaming of a main deck from the top of the fuel storage cabin to reach a methanol fuel daily-use cabin and a methanol fuel treatment room above the cabin; the double-pipe wall pipe section is positioned outside the methanol fuel processing room and connected with the engine or the generator in the engine compartment.

Preferably, the upper structure of the methanol fuel equipment room is provided with standard container feet, and the container can be directly loaded above the standard container feet, so that the cargo stacking amount is maximized.

Preferably, the fuel storage cabin is arranged below the middle deck, the methanol fuel equipment room and the methanol fuel filling station are arranged on the middle deck and below the main deck, wherein the middle deck is arranged below the main deck in parallel, and the superstructure is arranged on the main deck and above the fuel storage cabin.

Preferably, the fuel storage cabin is arranged below the main deck, the methanol fueling station and the methanol fuel equipment are uniformly distributed above the main deck, and the top wall of the fuel storage cabin is closely adjacent to the main deck so as to maximally improve the capacity of the fuel storage cabin.

Preferably, the methanol fuel storage cabin further comprises a pressure ventilation device, the pressure ventilation device at least comprises a communication pipeline and a pressure ventilation valve, the communication pipeline is communicated with the fuel storage cabin, the pressure in the methanol fuel storage cabin changes along with volatilization of methanol, and after the pressure in the methanol fuel storage cabin rises to a preset pressure range, the pressure ventilation valve is opened, so that the pressure in the methanol fuel storage cabin is reduced.

Preferably, the pressure ventilation device is arranged at three positions, and is respectively arranged above a binding bridge behind a ship superstructure, above a compass deck of the superstructure and on a front mast of a ship head.

As described above, the present invention provides a fuel storage tank and a container ship, in which the fuel storage tank is divided into a plurality of tanks along the width direction by corrugated partition plates, and the fuel storage tank is capable of storing one of methanol and fuel oil, and loading different fuels according to the actual demand of the shipper, thereby improving the flexibility of the fuel storage tank. The corrugated partition plate is provided with a continuous corrugated structure along the ship length direction, so that the structural strength of the corrugated partition plate is enhanced, more preferably, the cross section of each wave crest and each wave trough of the corrugated structure is trapezoidal, and the cross sections of the wave crests and the wave troughs are connected with a longitudinal strong structure at the bottom of the ship body, so that the structural strength of the corrugated partition plate is further improved.

For a container ship, the methanol fuel filling station is arranged above the fuel storage cabin, so that the filling path of the methanol fuel is shortened as much as possible; the methanol fuel equipment room is arranged above the fuel storage cabin, the space inside the container ship and the space on the middle deck are fully utilized on the premise of meeting the arrangement requirement of the fuel storage cabin, and standard container feet are arranged on the upper structure of the fuel equipment room, so that the maximization of the container loading space is realized, and the single-container transportation cost of the container ship is reduced; the daily cabin of the methanol fuel and the methanol fuel treatment room are arranged above the cabin area, so that the pipeline arrangement from the fuel treatment room to the cabin area where the main propulsion system is positioned is optimized, the safety of the cabin is improved, and meanwhile, the construction cost of the ship is saved.

The total layout structure of the dual-fuel container ship provided by the invention can use methanol fuel as marine fuel, the particulate matters generated by combustion are 99% lower than heavy oil, the ship uses methanol without fossil fuel, the emission of greenhouse gases can be obviously reduced, the host for combusting methanol reduces the emission of carbon dioxide (CO 2) by 8% compared with an engine for combusting heavy oil, the emission of Sulfide (SOX) by 97% and the emission of Nitrogen Oxides (NOX) by 60%. The methanol is in a liquid state at normal temperature and normal pressure, compared with LNG, the methanol fuel storage cabin does not need heat insulation and low-temperature storage, so that the methanol fuel storage cabin does not need an independent cabin or a film cabin, the ship body steel plate structural cabin is directly adopted, the construction is simple, the investment cost is low, the weight of an empty ship is not increased, and the cargo capacity of the ship can be effectively ensured.

Drawings

FIG. 1 is a top view of a fuel storage compartment according to the present invention.

Fig. 2 shows an enlarged schematic view of region C in fig. 1.

Fig. 3 is a sectional view showing a structure in which the fuel storage tank is placed in the hull of the ship according to the present invention.

Fig. 4 is a side view of a structure of a container ship according to the present invention.

Fig. 5 is an enlarged schematic view of the area a in fig. 4.

Fig. 6 is an enlarged schematic view of the area B in fig. 4.

Fig. 7 is a top view of the container ship according to the present invention.

Fig. 8 is an enlarged schematic view of the region D in fig. 7.

Fig. 9 is an enlarged schematic view of the area E in fig. 7.

Fig. 10-12 show 3 arrangements of fuel storage tanks.

Description of element reference numerals

1. Main deck

2. Intermediate deck

3. Cabin

4. Fuel storage tank

5. Methanol fuel filling station

6. Methanol fuel equipment room

7. Corrugated partition plate

8. Nitrogen generating room

9. Isolation air cabin

10. Daily cabin for methanol fuel

11. Methanol fuel treatment room

12. Pressure ventilation device

13. Daily fuel tank

14. Strong structure

15. Superstructure

16. Cabin canopy

17. Fuel tank inner membrane

18. Heating device

401. First cabin

402. Second cabin

403. Third cabin

404. Fourth cabin

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.

As described in detail in the embodiments of the present invention, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of explanation, and the schematic drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

For ease of description, spatially relative terms such as "under", "below", "beneath", "above", "upper" and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these spatially relative terms are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Furthermore, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or one or more intervening layers may also be present. As used herein, "between … …" is meant to include both endpoints.

In the context of this application, a structure described as a first feature being "on" a second feature may include embodiments where the first and second features are formed in direct contact, as well as embodiments where additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be changed at will, and the layout of the components may be more complex.

As shown in fig. 1 to 3, the present invention provides a fuel storage tank 4, the fuel storage tank 4 being partitioned by a corrugated partition plate 7 into a plurality of tanks arranged in the ship width direction;

the fuel storage cabin 4 is used for storing methanol or fuel; when the fuel storage cabin 4 is used for storing fuel, the inner surface of the cabin wall is also covered with a fuel cabin inner membrane 17, and a heating device 18 is also arranged in the cabin;

further, the inner wall of the fuel storage tank 4 also comprises an anti-corrosion coating, so that methanol can be directly stored. The isolation air cabin 9 surrounds the fuel storage cabin 4 in an inverted U shape, so that the fuel storage cabin 4 is effectively protected.

Specifically, the number of the chambers may be 4 or more, and include, for example, a first chamber 401, a second chamber 402, a third chamber 403, and a fourth chamber 404. The peaks and valleys of the corrugated partition plate 7 are respectively connected with the bottom longitudinal strong structures 14, so that the load on the corrugated bulkhead is transferred to the side and the bottom of the ship, and meanwhile, the corrugated partition plate structure can reduce the liquid shaking load in the ship when the ship swings to a certain extent. In addition, the corrugated partition plate 7 has a continuous corrugated structure in the ship length direction, that is, the fore-and-aft direction, thereby enhancing the structural strength of the corrugated partition plate 7, more preferably, each peak and each trough of the corrugated structure has a trapezoid cross section, and the peaks and the troughs are connected with the longitudinal strong structure 14 of the hull bottom, further enhancing the structural strength of the corrugated partition plate 7. The corrugated partition plate 7 is 10% -20% lighter than the flat plate partition plate in weight under the same strength, has a smooth surface, is convenient to clean, does not reduce the cabin capacity, and is beneficial to maintenance and corrosion prevention.

The fuel storage cabin 4 can select one of methanol and fuel oil for storage, different fuels can be loaded according to the actual demand of the shipper, and the flexibility of the fuel storage cabin 4 is improved. The inner wall surface of the fuel storage cabin 4 is specially coated with corrosion resistance, so that methanol can be directly stored; however, when the market price of methanol fuel is too high and the price of fuel is economical, the fuel storage tank 4 can be used to store fuel by thoroughly cleaning the tank and covering the inner surface of the fuel storage tank 4 with a fuel tank inner membrane 17 and installing a modular detachable heating device 18. When the storage cabin is changed from storing fuel oil to storing methanol, the inner film 17 of the fuel oil cabin can be torn off, and the heating device 18 can be integrally detached, so that the problem that the conveying pipeline is blocked due to chemical reaction between residual methanol and fuel oil when the fuel oil is mixed can be avoided.

Based on the above-mentioned fuel storage tanks 4, the present invention also provides a container ship, as shown in fig. 4 to 6, comprising:

a main deck 1, wherein the fuel storage cabin 4 is arranged below the main deck 1 and positioned on the front section of the ship body;

a nacelle 3, the nacelle 3 being located below the main deck 1 and at the rear section of the hull for providing power;

a cabin shed 16 arranged above the main deck 1 for ventilating the cabin 3;

the methanol fuel daily cabin 10 and the methanol fuel treatment room 11 which are adjacently arranged are positioned above the cabin 3, methanol from the fuel storage cabin 4 is sequentially conveyed to the methanol fuel daily cabin 10 and the methanol fuel treatment room 11 through a methanol fuel pipeline, the methanol fuel in the fuel storage cabin 4 needs to be pumped out through a methanol fuel pump, reaches the methanol fuel daily cabin 10 through a methanol fuel pipeline system and is rotated, and after being treated by the methanol fuel treatment room 11 (meeting the combustion condition of a methanol fuel main engine), the methanol fuel is conveyed to equipment such as the methanol fuel main engine, a methanol fuel generator, a methanol fuel boiler and the like in the cabin 3 where the main propulsion system is positioned along the methanol fuel pipeline. The methanol fuel processing room 11 is arranged above the area close to the engine room 3 where the main propulsion system is arranged, so that the length of a methanol fuel pipeline from the fuel processing room to the engine room 3 area is shortened as much as possible, the methanol fuel pipeline arrangement is optimized, and the ship construction cost is saved.

Specifically, the methanol fuel pipeline is divided into a single-pipe wall section and a double-pipe wall section, and the single-pipe wall methanol pipeline passes through a region below a hatch coaming of a main deck from the top of the fuel storage cabin 4 to reach a methanol fuel daily-use cabin 10 and a methanol fuel treatment room 11 above the cabin; the double pipe wall section is located outside the methanol fuel processing compartment 11 and is connected to the engine or the generator in the nacelle 3.

The fuel daily-use cabin 13 is positioned at the inner front part of the cabin 3, when the fuel storage cabin 4 is used for storing fuel, the fuel in the fuel storage cabin 4 reaches the fuel daily-use cabin 13 through a fuel pipeline system, and the fuel in the fuel daily-use cabin 13 is conveyed to a main engine, a generator, a boiler and other equipment in the cabin 3 where the main propulsion system is positioned along the fuel pipeline.

Further, the device also comprises a methanol fuel device room 6 which is arranged above the fuel storage cabin 4, wherein the methanol fuel device room 6 comprises a pump, a valve, various detection instruments and the like; the methanol fuel system further comprises a nitrogen generation room 8 which is arranged near (such as on the front side of) the methanol fuel equipment room 6 and is positioned above the fuel storage cabin 4, and methanol fuel filling stations 5 are arranged on the left side and the right side of the methanol fuel equipment room 6 and the nitrogen generation room 8, and the methanol fuel filling stations 5 are used for conveying methanol fuel from a wharf or a floating device to the fuel storage cabin 4 on the ship as shown in fig. 9.

The methanol fuel filling station 5 is arranged above the fuel storage cabin 4 and on the left and right sides of the nitrogen generating room 8, and is close to the ship side, so that when a container ship is berthed at a wharf or is berthed with a filling ship, methanol fuel is filled into the fuel storage cabin 4 on the ship by an onshore liquid tank or a filling ship liquid tank, and the pipeline from the methanol fuel filling station 5 to the fuel storage cabin 4 is shortened by the arrangement, and the methanol fuel filling time is saved; in addition, a nitrogen generating room 8 is arranged above the fuel storage tank 4 to facilitate the supply of nitrogen to the fuel storage tank 4 for inerting.

The upper structure of the methanol fuel equipment room 6 is provided with standard container feet, and the container can be directly loaded above the standard container feet, so that the cargo stacking capacity is maximized.

Further, a superstructure 15 is provided on the main deck 1 above the fuel storage tanks 4. There are various arrangements for the specific locations of the fuel storage tanks 4, the methanol fuel plant room 6, the superstructure 15, the methanol fueling station 5, etc.

As one arrangement, as shown in fig. 6, the fuel storage tank 4 is disposed below the middle deck 2, and the methanol fuel cell 6 and the methanol fueling station 5 are disposed on the middle deck 2 and below the main deck 1, wherein the middle deck 2 is disposed in parallel below the main deck 1. The methanol fuel cell 6 and the methanol fuel filling station 5 cover the fuel storage tank 4 in the ship length direction, and the superstructure 15 is positioned on the main deck 1 and is correspondingly positioned right above the methanol fuel filling station 5. At this time, the fuel storage tank 4 is disposed below the intermediate deck 2, away from the superstructure 15, improving crew safety.

As still another arrangement scheme, as shown in fig. 10, the fuel storage tanks 4 are arranged below the main deck 1, and the methanol fuel filling stations 5 and the methanol fuel devices 6 are uniformly distributed on the main deck 1, so that the top wall of the fuel storage tanks 4 is closely adjacent to the main deck 1, and the tank capacity of the fuel storage tanks 4 is increased, so that the fuel storage tanks are suitable for application scenes with longer airlines and larger consumption requirements on fuel in the transportation process. At this time, the methanol fuel equipment room 6 and the methanol fuel filling station 5 are both positioned above the rear section of the fuel storage cabin 4; an superstructure 15 is located on the main deck 1, and correspondingly above the front section of the fuel storage tanks 4.

As still another arrangement, as shown in fig. 11, where the route is short, the fuel consumption during transportation is small, the hold capacity of the fuel storage tank 4 can be appropriately reduced, thereby increasing the boxing area in the cargo tank, and the front and rear bulkheads of the fuel storage tank 4 do not exceed the area of the superstructure 15, i.e., are located directly below the superstructure 15. The methanol fuel cell 6 and the methanol fuel filling station 5 are positioned below the main deck 1 and cover the fuel storage tank 4 in the ship length direction, and the superstructure 15 covers the methanol fuel cell 6 and the methanol fuel filling station 5 in the ship length direction.

As still another arrangement, as shown in fig. 12, the methanol fuel compartment 6 and the methanol fueling station 5 are located above the main deck 1 and cover the fuel storage tank 4 in the ship's length direction, and the superstructure 15 covers the methanol fuel compartment 6 and the methanol fueling station 5 in the ship's length direction.

Further, the container ship further comprises a pressure ventilation device 12, the pressure ventilation device 12 at least comprises a communication pipeline and a pressure ventilation valve, the communication pipeline is communicated with the fuel storage cabin 4, along with volatilization of methanol, the pressure in the methanol fuel storage cabin 4 can change, and after the pressure in the methanol fuel storage cabin 4 rises to a preset pressure range, the pressure ventilation valve is opened, so that the pressure in the methanol fuel storage cabin 4 is reduced. As a preferable scheme, the pressure ventilation device 12 is arranged at three positions, namely above a binding bridge behind the superstructure of the ship, above a compass deck of the superstructure 15 and on a front mast of the head of the ship.

Specifically, the pressure ventilation device 12 is arranged above the binding bridge behind the ship superstructure, so that the pressure ventilation device 12 has a certain height from the upper plate surface of the main deck 1, and the volatilized methanol floats backwards during navigation, so that the safety of the ship operators is not affected; the pressure ventilation device 12 is arranged above the compass deck of the superstructure 15, so that the pressure ventilation device 12 has enough height from the main deck 1 and the superstructure 15, and the safety of the shipboard operators is not affected; the pressure ventilation device 12 is arranged on the front mast of the head of the ship, so that the pressure ventilation device 12 has a certain height from the upper plate surface of the main deck 1 and a sufficient distance from the superstructure 15, and the safety of the shipboard operators is not affected.

In summary, the present invention provides a fuel storage tank and a container ship, in which the fuel storage tank is divided into a plurality of tanks along the width direction by corrugated partition plates, and the fuel storage tank can select one of methanol and fuel for storage, and can load different fuels according to the actual demand of the shipper, thereby improving the flexibility of the fuel storage tank. The corrugated partition plate is provided with a continuous corrugated structure along the ship length direction, so that the structural strength of the corrugated partition plate is enhanced, more preferably, the cross section of each wave crest and each wave trough of the corrugated structure is trapezoidal, and the cross sections of the wave crests and the wave troughs are connected with a longitudinal strong structure at the bottom of the ship body, so that the structural strength of the corrugated partition plate is further improved.

Meanwhile, the ship fuel storage cabin arrangement structure effectively reduces the emission of ship pollutants by arranging the fuel storage cabin on the ship for transporting the non-methanol cargoes so as to propel the ship. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A fuel storage tank, characterized in that the fuel storage tank is partitioned by a corrugated partition plate into a plurality of tanks arranged in a ship width direction;

2. The fuel storage tank of claim 1, wherein the corrugated partition plate has a continuous corrugated structure along the length direction of the ship, thereby enhancing the structural strength of the corrugated partition plate, the cross section of each peak and each trough of the corrugated structure is trapezoidal, and the peaks and the troughs are connected with a longitudinal strong structure at the bottom of the ship, further enhancing the structural strength of the corrugated partition plate.

3. A container ship, characterized in that it comprises:

4. A container ship according to claim 3, characterized in that the container ship further comprises a methanol fuel unit room arranged above the fuel storage tank, a nitrogen generation room arranged near the methanol fuel unit room and above the fuel storage tank, and methanol fuel filling stations provided on both the left and right sides of the methanol fuel unit room and the nitrogen generation room, which methanol fuel filling stations transport methanol fuel from a quay or floating device into the fuel storage tank on the ship.

5. A container ship according to claim 3, wherein the methanol fuel pipeline is divided into a single-pipe wall section and a double-pipe wall section, the single-pipe wall section passing from the top of the fuel storage compartment through the area below the main deck hatch to the methanol fuel day tank and the methanol fuel treatment room above the compartment; the double-pipe wall pipe section is positioned outside the methanol fuel processing room and connected with the engine or the generator in the engine compartment.

6. A container ship according to claim 3, wherein the upper structure of the methanol fuel unit room is provided with standard container feet, over which containers can be directly loaded, to maximize the cargo capacity.

7. A container ship according to claim 3, wherein the fuel storage tanks are arranged below an intermediate deck, the methanol-fuelling station and the methanol-fuelling station being located on the intermediate deck and below the main deck, wherein the intermediate deck is located parallel below the main deck, and the superstructure is located on the main deck and above the fuel storage tanks.

8. A container ship according to claim 3, wherein the fuel storage tanks are arranged below the main deck, and the methanol fueling station and the methanol fueling equipment are arranged above the main deck, and the top wall of the fuel storage tanks is immediately adjacent to the main deck to maximize the capacity of the fuel storage tanks.

9. A container ship according to claim 3, further comprising a pressure ventilation device, wherein the pressure ventilation device comprises at least a communication pipeline and a pressure ventilation valve, the communication pipeline is communicated with the fuel storage tank, the pressure in the methanol fuel storage tank changes along with volatilization of methanol, and when the pressure in the methanol fuel storage tank rises to a preset pressure range, the pressure ventilation valve is opened, so that the pressure in the methanol fuel storage tank is reduced.

10. The container ship according to claim 9, wherein the pressure ventilation means are arranged at three positions, respectively above a lashing bridge behind the superstructure of the ship, above the compass deck of the superstructure, on the front mast of the ship's head.