CN115092331A

CN115092331A - Dual-fuel container ship

Info

Publication number: CN115092331A
Application number: CN202210770351.5A
Authority: CN
Inventors: 李腾飞; 路玉娟; 张志文; 罗军; 王大志
Original assignee: Guangzhou Shipyard International Co Ltd
Current assignee: Guangzhou Shipyard International Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-09-23

Abstract

The invention belongs to the technical field of ships and particularly discloses a dual-fuel container ship. The dual-fuel container ship comprises a ship body, wherein the ship body is provided with an upper building, a container stacking area and an engine; a fuel supply system for supplying fuel to the engine; the methanol fuel supply system comprises a filling station, a methanol storage cabin and a methanol fuel processing cabin which are sequentially communicated by adopting pipelines, wherein a methanol lightering pump, a methanol daily cabin, a methanol supply device and a methanol valve bank which are sequentially connected by pipelines are arranged in the methanol fuel processing cabin, the methanol fuel processing cabin is positioned outside the cabin and below a container stacking area, the methanol storage cabin is positioned below an upper-layer building, the filling station is positioned above a main deck and on the side part of the upper-layer building, and isolation empty cabins are arranged on the peripheries of the methanol storage cabin and the methanol fuel processing cabin. The dual-fuel container ship disclosed by the invention can reduce the sulfur emission of the dual-fuel container ship and ensure the packing capacity of the dual-fuel container ship.

Description

Dual-fuel container ship

Technical Field

The invention belongs to the technical field of ships, and particularly relates to a dual-fuel container ship.

Background

The ship is a common marine transportation means, and the conventional ship is generally driven by fuel oil and generally has the defects of high oil consumption cost, high pollution and the like. With the increasing importance of people on the marine environment and the effective 'sulfur-limiting order' issued by the international maritime organization, clean energy capable of reducing the sulfur content is more and more widely applied to ships to replace fuel oil.

The alternative fuels for ships are various, and mainly include methanol, LNG, biofuel, hydrogen, etc., wherein methanol is gradually used for supplying fuel to ships due to advantages of high yield, convenient storage and transportation, low use cost, etc. However, the methanol fuel supply system occupies a large space, and the container ship has a high requirement on the container capacity, so that the available area of the deck is limited, and the methanol fuel supply system cannot be applied to the container ship in a conventional oil tanker, and the existing container ship is difficult to use methanol as fuel.

Therefore, there is a need for a dual fuel container ship to solve the above problems.

Disclosure of Invention

The invention aims to provide a dual-fuel container ship, which is used for realizing the application of methanol fuel on the container ship while reducing the occupation of the container capacity of the container ship, and can flexibly select the fuel supply mode of the container ship and reduce the sulfur emission of the container ship.

In order to achieve the purpose, the invention adopts the following technical scheme:

a dual fuel container ship comprising:

the ship body is provided with an upper building and a container stacking area above a main deck respectively, the container stacking area is positioned at the rear side of the upper building, the tail part of the ship body is provided with a propeller, and an engine for driving the propeller to rotate is arranged in a cabin at the tail part of the ship body;

the fuel oil fuel supply system is connected with the engine and used for supplying fuel oil fuel to the engine;

methanol fuel supply system, including filling station, methyl alcohol storage compartment and the methyl alcohol fuel processing cabin that adopts the pipeline to communicate in proper order, be provided with the methyl alcohol lightering pump, the daily cabin of methyl alcohol, methyl alcohol supply apparatus and the methyl alcohol valves that connect gradually through the pipeline in the methyl alcohol fuel processing cabin, the methyl alcohol lightering pump connect in methyl alcohol storage compartment with between the daily cabin of methyl alcohol, methyl alcohol supply apparatus passes through the methyl alcohol valves with the engine is connected, methyl alcohol fuel processing cabin is located the cabin outside is located the container is put things in good order the district below, methyl alcohol storage compartment is located superstructure below, filling station is located main deck top just is located superstructure is followed one side at least of ship width direction, methyl alcohol storage compartment reaches the periphery in methyl alcohol fuel processing cabin all is provided with the isolation vacant lot.

As an optional technical scheme of the dual-fuel container ship, each isolation empty cabin is internally provided with a methanol detection device and a ventilation system, the methanol detection device is used for detecting the concentration of methanol in the isolation empty cabin, and the ventilation system is used for ventilating the isolation empty cabin.

As an optional technical scheme of a dual-fuel container ship, the methyl alcohol lighterage pump through the methyl alcohol lighterage pipeline with the cabin intercommunication is stored to the methyl alcohol, the methyl alcohol lighterage pipeline is double-barrelled wall pipeline and passes through the pipe tunnel of hull bottom.

As an optional technical scheme of a dual-fuel container ship, the dual-fuel container ship still includes the generator, the methyl alcohol valves includes first valves and second valves, methyl alcohol supply apparatus through first methyl alcohol supply line with the engine is connected, methyl alcohol supply apparatus through second methyl alcohol supply line with the generator is connected, be provided with on the first methyl alcohol supply line first valves, be provided with on the second methyl alcohol supply line the second valves.

As an optional technical scheme of the dual-fuel container ship, the first methanol supply pipeline and the second methanol supply pipeline respectively comprise a double-pipe-wall pipe section and a single-pipe-wall pipe section which are connected, the single-pipe-wall pipe section is located inside the methanol fuel processing cabin, the double-pipe-wall pipe section is located outside the methanol fuel processing cabin and is connected with the engine or the generator, and the first valve group and the second valve group are both arranged on the corresponding single-pipe-wall pipes.

As an optional technical scheme of the dual-fuel container ship, the methanol storage tank comprises a methanol equipment tank and a methanol daily tank which are arranged side by side along the ship length direction, the methanol supply equipment and the methanol valve bank are arranged in the methanol equipment tank, and the methanol equipment tank is positioned at the rear side of the methanol daily tank.

As an optional technical scheme of the dual-fuel container ship, the filling stations are arranged on two sides of the superstructure in the ship width direction, and each filling station is connected with the methanol storage tank.

As an optional technical scheme of the dual-fuel container ship, the distance between the outer cabin wall of the isolation empty cabin and the corresponding cabin wall of the methanol storage cabin or the methanol fuel processing cabin is 800-2000 mm.

As an optional technical solution for the dual-fuel container ship, the dual-fuel container ship further comprises an inert gas inerting purging system, and the inert gas inerting purging system is used for inerting and/or purging the methanol daily tank, the methanol storage tank, and the methanol supply device.

As an optional technical scheme of the dual-fuel container ship, a nitrogen equipment room is arranged in the engine room, the inert gas inerting and purging system comprises a nitrogen generating device and a nitrogen storage device which are arranged in the nitrogen equipment room, the nitrogen generating device is connected with the nitrogen storage device, and the nitrogen storage device is respectively communicated with the methanol daily cabin, the methanol storage cabin and the methanol supply equipment through an inerting pipeline and a purging pipeline.

The invention has the beneficial effects that:

according to the dual-fuel container ship provided by the invention, the methanol fuel supply system and the fuel oil fuel supply system are arranged, so that two optional fuels can be provided for the operation of the dual-fuel container ship, the requirement on endurance can be met, the sulfur emission content is reduced, and the requirement on environmental protection is met; meanwhile, the methanol storage cabin is arranged below the superstructure, the filling station is arranged on the side part of the superstructure, and the methanol fuel processing cabin is arranged below the container stacking area and on the outer side of the cabin, so that the arrangement of the methanol storage cabin and the arrangement of the methanol fuel processing cabin can avoid linear contraction areas of the bow and the stern of a ship, the space is utilized to the maximum extent, a larger cabin capacity is obtained, the container loading amount is not lost, and the layout of a methanol fuel supply system can better meet the use requirement of a container ship; through setting up the isolation cabin, can store cabin and methanol fuel processing cabin with the methyl alcohol and keep apart with other cabins, when being favorable to methyl alcohol to leak protection detection, also avoid methyl alcohol to leak to other cabins and influence the safety in utilization in other cabins.

Drawings

FIG. 1 is a front view of a dual fuel container ship provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

fig. 3 is a side view of a dual fuel container ship provided by an embodiment of the present invention.

The figures are labeled as follows:

1. a hull; 11. a nacelle; 12. pipe tunneling; 13. building the upper layer; 14. a container stacking area; 15. a nitrogen equipment room; 16. isolating the empty cabin;

2. a methanol fuel supply system; 21. a methanol storage tank; 22. a methanol supply device; 23. a methanol daily cabin; 24. a methanol transfer pump; 25. a methanol valve bank; 251. a first valve block; 252. a second valve block; 26. a methanol filling system; 261. a filling station; 262. a filling pipeline; 27. a methanol lightering pipeline; 28. a first methanol supply line; 281. a first double-walled pipe section; 282. a first single pipe wall section; 29. a second methanol supply line; 291. a second double pipe wall section; 292. a second single pipe wall section; 210. a methanol plant room; 220. a first methanol delivery line; 230. a second methanol delivery line;

3. a propeller; 4. an engine; 5. an electric generator.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used based on the orientations or positional relationships shown in the drawings for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 3, the embodiment provides a dual-fuel container ship, which includes a fuel oil fuel supply system and a methanol fuel supply system, and can flexibly select fuel required by ship operation, meet the requirement of ship sulfur emission, and achieve the effects of ship energy conservation and emission reduction.

Specifically, the dual-fuel container ship comprises a ship body 1 and a power system, wherein the power system comprises a propeller 3, a generator 5, a fuel oil fuel supply system and a methanol fuel supply system 2, and the propeller 3 is arranged at the stern of the ship body 1 and used for realizing the propulsion of the ship and meeting the navigation requirements of the ship; the fuel oil fuel supply system and the methanol fuel supply system 2 are respectively connected with the engine 4 to supply fuel for the engine 4 to work; the engine 4 is connected with the propeller 3, and the engine 4 is used for driving the propeller 3 to rotate so as to realize propulsion.

The ship body 1 comprises a hull forming a main ship body structure and a main deck horizontally arranged, a cabin space located below the main deck is formed by the hull and the main deck in a surrounding mode, the cabin space is divided into a plurality of independent cabins through a transverse cabin partition plate and a longitudinal cabin partition plate, the cabins comprise cabins 11 located at the tail portion of the ship body 1, and the engine 4 is arranged in the cabins 11. An upper building 13 is arranged above the main deck and close to the bow, and the upper building 13 is used as a living area of the dual-fuel ship; the main deck top still is provided with the container of being located superstructure 13 rear side and puts things in good order district 14, and container puts in good order district 14 and is provided with the hoist device who is used for hoisting the container.

The methanol fuel supply system 2 includes a methanol storage tank 21, a methanol fuel processing tank, a methanol filling system 26, and a methanol piping system. A methanol storage tank 21 is provided below the main deck and below the superstructure 13, the methanol storage tank 21 being used to store a large volume of methanol to enable methanol supply; the methanol fuel processing cabin is positioned below the container stacking area 14 and is positioned at the outer side of the cabin 11 and close to the front wall of the cabin 11, a methanol transfer pump 24, a methanol daily cabin 23, a methanol supply device 22 and a methanol valve bank 25 which are sequentially connected through pipelines are arranged in the methanol fuel processing cabin, the methanol transfer pump 24 is connected between the methanol storage cabin 21 and the methanol daily cabin 23, and the methanol supply device 22 is connected with the engine 4 through the methanol valve bank 25; the methanol filling system 26 includes a filling station 261, the filling station 261 being disposed above the methanol storage tank 21 and on at least one side of the superstructure 13 in the ship width direction, the filling station 261 being for replenishing the methanol storage tank 21 with methanol.

According to the dual-fuel container ship provided by the embodiment, the methanol fuel supply system 2 and the fuel oil fuel supply system are arranged, so that two optional fuels can be provided for the operation of the dual-fuel container ship, the endurance requirement can be met, the sulfur emission content can be reduced, and the environmental protection requirement can be met; meanwhile, the methanol storage tank 21 is arranged below the superstructure 13, the filling station 261 is arranged at the side part of the superstructure 13, and the methanol fuel processing tank is arranged below the container stacking area 14 and outside the engine room 11, so that the arrangement of the methanol storage tank 21 and the arrangement of the methanol fuel processing tank can avoid linear contraction areas of the bow and the stern of a ship, the space is utilized to the maximum extent, a large tank capacity is obtained, the packing amount is not lost, and the layout of the methanol fuel supply system 2 can better meet the use requirement of a container ship.

Due to the characteristic of flammability of methanol, the areas of the methanol storage tank 21 and the methanol fuel processing tank are dangerous areas, the use safety of the methanol fuel supply system 2 and the dual-fuel container ship is improved, the peripheries of the methanol storage tank 21 and the methanol fuel processing tank are both provided with an isolation empty tank 16, and the isolation empty tank 16 is used for isolating the methanol storage tank 21 and the methanol fuel processing tank from other tanks, so that the methanol leakage prevention detection is facilitated, and the influence of the methanol leakage to other tanks on the use safety of other tanks is avoided. It will be appreciated that the above-mentioned division of the hazardous area is mainly in compliance with the relevant regulations of the standard IEC-60092-502 for liquid cargo vessels carrying flammable liquids with flash points not exceeding 60 deg..

In the present embodiment, the methanol storage tank 21 and the methanol fuel processing tank are provided with isolation empty tanks 16 at the front, rear, left, right, upper and lower sides thereof, so as to realize the omni-directional isolation of the methanol storage tank and the methanol fuel processing tank. The distance between the outer bulkhead of the isolation empty chamber 16 and the corresponding bulkhead of the methanol storage chamber 21 or the methanol fuel processing chamber is 800 mm-2000 mm, so that the isolation effect is ensured, and the isolation empty chamber 16 is prevented from occupying a large space. The optimum spacing is 900mm to 1100 mm.

The methanol filling system 26 comprises a filling station 261 and a filling pipeline 262, wherein the filling station 261 is communicated with the methanol storage cabin 21 through the filling pipeline 262, and the filling station 261 is used for filling methanol into the methanol storage cabin 21 through the filling pipeline 262 by external methanol, so that the methanol capacity in the methanol storage cabin 21 is ensured. Preferably, there are two filling stations 261, two filling stations 261 are respectively disposed on two sides of the superstructure 13 in the ship width direction, and the two filling stations 261 are respectively communicated with the methanol storage tank 21 through filling pipes 262.

In order to control the time of filling the methanol, a liquid level detection device is arranged in the methanol storage cabin 21 to detect the content of the methanol in the filling station 261, control the time of filling the methanol, and cut off the methanol supply of the methanol fuel supply system 2 to the engine 4 in time when the methanol capacity is insufficient, so as to ensure the normal use of the engine 4.

The methanol fuel processing cabin comprises a methanol equipment room 210 and a daily methanol cabin 23 which are arranged side by side, the methanol supply equipment 22, the methanol valve bank 25 and the methanol transfer pump 24 are all arranged in the methanol equipment room 210, the methanol storage cabin 21 is connected with the methanol transfer pump 24 through a methanol transfer pipeline 27, the methanol transfer pump 24 is connected with the daily methanol cabin 23 through a first methanol conveying pipeline 220, and the daily methanol cabin 23 is connected with the methanol supply equipment 22 through a second methanol conveying pipeline 230. The methanol daily tank 23 is a small-volume storage tank for methanol, and is used for storing a small amount of methanol for daily use and as a methanol storage tank for recycling in a ship. The methanol valve group 25 is used for controlling the on-off of a methanol fuel supply pipeline so as to realize the supply and cut-off of the methanol fuel to the engine 3.

The preferred pipe tunnel 12 that passes through hull 1 bottom of methyl alcohol lighterage pipeline 27 to improve the security that the pipeline arranged, reduce the space and occupy, and reduce the probability that methyl alcohol reveals to the cabin. The methanol lightering pipeline 27 is preferably a double-pipe-wall pipeline, so that the safety of methanol conveying can be effectively improved.

The methanol lightering pipeline 27 can be a negative pressure ventilation double-pipe wall or a vacuum double-pipe wall. In this embodiment, the methanol lightering pipeline 27 includes an inner pipe, an outer pipe, and a bracket disposed between the inner pipe and the outer pipe, and the outer pipe is sleeved in the inner pipe. The outer tube and the inner tube are preferably resiliently disposed to absorb vibrations of the inner tube caused by changes in fluid pressure. Preferably, a double-pipe wall ventilation system is provided between the inner and outer pipes for pumping away methanol vapor that may escape between the inner and outer pipes to ventilate the space between the inner and outer pipes to prevent the risk of evidence of vapor accumulation after methanol leakage. Further, set up methyl alcohol gas sensor between inner tube and the outer tube to the methyl alcohol content between monitoring inner tube and the outer tube can in time be discover when methyl alcohol reveals, improves the safety in utilization of methyl alcohol lighterage pipeline 27.

Since the first methanol delivery pipe 220 and the second methanol delivery pipe 230 are both disposed in the methanol fuel processing compartment, it is preferable that the first methanol delivery pipe 220 and the second methanol delivery pipe 230 are both single-walled pipes to reduce costs.

The dual-fuel container ship further comprises a generator 5, the methanol valve group 25 comprises a first valve group 251 and a second valve group 252, the methanol supply device 22 is connected with the engine 4 through a first methanol supply pipeline 28, the methanol supply device 22 is connected with the generator 5 through a second methanol supply pipeline 29, the first valve group 251 is arranged on the first methanol supply pipeline 28, and the second valve group 252 is arranged on the second methanol supply pipeline 29. That is, in the present embodiment, the methanol fuel supply system 2 supplies methanol not only to the engine 4 so that the methanol fuel can be used for ship propulsion, but also to the generator 5 so that the generator 5 can generate electricity using the methanol fuel to supply electric power to other electric devices on the ship, thereby improving the cruising ability of the ship.

Preferably, the first methanol supply pipeline 28 and the second methanol supply pipeline 29 each comprise a double-wall pipe section and a single-wall pipe section connected to each other, the single-wall pipe section is located inside the methanol fuel processing cabin, the double-wall pipe section is located outside the methanol fuel processing cabin and is connected to the engine 4 or the generator 5, and the first valve set 251 and the second valve set 252 are both disposed on the corresponding single-wall pipe. In other words, in this embodiment, the methanol supply pipeline inside the methanol fuel processing chamber is a single-wall pipeline, and the pipeline outside the methanol fuel processing chamber is a double-wall pipeline, so that the pipeline arrangement cost can be effectively reduced while the safety of methanol delivery is ensured.

Specifically, the first methanol supply pipeline 28 includes a first double-pipe-wall pipe segment 281 and a first single-pipe-wall pipe segment 282, two ends of the first double-pipe-wall pipe segment 281 are respectively connected with the first single-pipe-wall pipe segment 282 and the engine 4, the first single-pipe-wall pipe segment 282 is connected with the methanol supply device 22, and the first valve group 251 is disposed on the first single-pipe-wall pipe segment 282. The second methanol supply line 29 includes a second double-pipe-wall pipe segment 291 and a second single-pipe-wall pipe segment 292, the second double-pipe-wall pipe segment 291 is connected at two ends to the second single-pipe-wall pipe segment 292 and the generator 5, the second single-pipe-wall pipe segment 292 is connected to the methanol supply device 22, and the second valve group 252 is disposed on the second single-pipe-wall pipe segment 292.

Preferably, the first double-walled pipe segment 281 and the second double-walled pipe segment 291 may be a negative pressure ventilation double-walled pipe or a vacuum double-walled pipe, which is not limited in the present invention.

The dual-fuel container ship also comprises a ventilation system and a methanol detection device, wherein the methanol detection device is used for detecting the content of methanol in the air in the cabin of the ship so as to detect whether the methanol leaks, and the ventilation system is used for ventilating so as to pump and discharge the methanol in the cabin to the outside of the dual-fuel container ship. In this embodiment, it is preferable that each of the isolated empty compartments 16 is provided with a methanol detecting device and a ventilation system, so as to check whether methanol leaks from the methanol storage compartment 21 and/or the methanol fuel processing compartment, and ventilate in time to reduce the methanol content in the isolated empty compartment 16. Furthermore, a ventilation system and a methanol detection device are arranged in the methanol fuel processing cabin and the engine room 11, so that the detection and ventilation of methanol at each place where the methanol is easy to leak are realized, the effective detection of the methanol once leaking is effectively ensured, and the use safety of the dual-fuel container ship is effectively improved.

In order to improve the safety of the dual-fuel container ship, the dual-fuel container ship further comprises an inert gas inerting purging system, and the inert gas inerting purging system is used for inerting and purging the methanol daily tank 23, the methanol storage tank 21, the methanol supply equipment 22 and relevant connecting pipelines. Specifically, the inert gas inerting purging system comprises a gas source supply assembly, an inert gas purging system and an inert gas inerting system, wherein the gas source supply assembly is respectively connected with the inert gas purging system and the inert gas inerting system. The gas source supply assembly comprises a nitrogen generating device and a nitrogen storage device, the nitrogen generating device is connected with the nitrogen storage device, and the nitrogen storage device is connected with an inert gas purging system and an inert gas inerting system respectively through an inerting pipeline and a purging pipeline. In the present embodiment, a nitrogen plant room 15 is provided in the nacelle 11, and a nitrogen generation device and a nitrogen storage device are provided in the nitrogen plant room 15.

The inert gas purging system is communicated with the methanol storage tank 21, the methanol daily tank 23, the methanol supply device 22, the filling station 261, the first methanol supply line 28, the second methanol supply line 29, the methanol transfer line 27 and the like through purging lines to realize inert gas blowing so as to blow methanol vapor in the lines and the device back to the methanol storage tank 21 and the methanol daily tank 23. When the inert gas purging system is used for methanol filling, fuel switching of the engine 4, stopping of the engine 4 and maintenance of the engine 4 and supply equipment, pressurized nitrogen is introduced into the pipeline, residual methanol in the pipeline and the equipment is blown back to the methanol daily-use cabin 23, and the methanol is prevented from being released into the air, so that the safety of maintenance personnel is ensured, and the danger of fire and explosion is avoided.

The nitrogen inerting system is used for filling nitrogen into the methanol storage tank 21 and the methanol daily-use tank 23 through an inerting pipeline, and ensures that the methanol storage tank 21 and the methanol daily-use tank 23 are in an inerting environment under the condition that the liquid level in the tank shakes in the navigation process of a ship by combining the ventilation of a PV valve (high-speed ventilation valve) and the automatic nitrogen supply, so that the danger of explosion caused by air mixing is avoided. The inerting is to fill nitrogen gas into the methanol fuel storage tank and the methanol day tank 23 to reduce the concentration of oxygen in the methanol storage tank 21 and the methanol day tank 23, thereby preventing the methanol storage tank 21 and the methanol day tank 23 from being ignited or exploded.

In a preferred embodiment, the dual-fuel container ship further includes a fire detection system, a monitoring system, an emergency stop system, a fire protection system, etc., and the settings of the fire detection system, the monitoring system, the emergency stop system, and the fire protection system may refer to the settings on other ships using methanol, which are not described herein again.

It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A dual fuel container ship, comprising:

the ship comprises a ship body (1), wherein an superstructure (13) and a container stacking area (14) are respectively arranged above a main deck of the ship body (1), the container stacking area (14) is positioned at the rear side of the superstructure (13), a propeller (3) is arranged at the tail part of the ship body (1), and an engine (4) for driving the propeller (3) to rotate is arranged in a cabin (11) at the stern part of the ship body (1);

the fuel oil fuel supply system is connected with the engine (4) and is used for supplying fuel oil fuel to the engine (4);

methanol fuel feeding system (2), including filling station (261), methyl alcohol storage tank (21) and the methyl alcohol fuel processing cabin that adopt the pipeline to communicate in proper order, be provided with in the methyl alcohol fuel processing cabin and refute pump (24), the daily cabin of methyl alcohol (23), methyl alcohol supply apparatus (22) and methyl alcohol valves (25) that connect gradually through the pipeline, methyl alcohol refute pump (24) connect in methyl alcohol storage tank (21) with between the daily cabin of methyl alcohol (23), methyl alcohol supply apparatus (22) pass through methyl alcohol valves (25) with engine (4) are connected, methyl alcohol fuel processing cabin is located the cabin (11) outside is located container stowage area (14) below, methyl alcohol storage tank (21) are located superstructure (13) below, filling station (261) is located the main deck top just is located superstructure (13) is along at least one side of ship width direction, and isolation empty chambers (16) are arranged at the peripheries of the methanol storage chamber (21) and the methanol fuel processing chamber.

2. The dual fuel container ship as claimed in claim 1, characterized in that a methanol detection device for detecting the concentration of methanol in the isolated empty tank (16) and a ventilation system for ventilating the isolated empty tank (16) are provided in each isolated empty tank (16).

3. The dual fuel container ship of claim 1, wherein the methanol transfer pump (24) is in communication with the methanol storage tank (21) through a methanol transfer line (27), the methanol transfer line (27) being a double tube wall line and passing through a tube tunnel (12) at the bottom of the hull (1).

4. The dual fuel container ship as claimed in claim 1, further comprising a generator (5), wherein the methanol valve block (25) comprises a first valve block (251) and a second valve block (252), wherein the methanol supply device (22) is connected to the engine (4) via a first methanol supply line (28), wherein the methanol supply device (22) is connected to the generator (5) via a second methanol supply line (29), wherein the first valve block (251) is arranged on the first methanol supply line (28), and wherein the second valve block (252) is arranged on the second methanol supply line (29).

5. The dual fuel container ship as claimed in claim 4, characterized in that the first methanol supply line (28) and the second methanol supply line (29) each comprise a connected double-walled pipe section and a single-walled pipe section, the single-walled pipe section being located inside the methanol fuel processing tank, the double-walled pipe section being located outside the methanol fuel processing tank and being connected to the engine (4) or the generator (5), the first valve block (251) and the second valve block (252) each being arranged on a corresponding single-walled pipe.

6. The dual fuel container ship as claimed in claim 1, wherein the methanol storage tank (21) includes a methanol facility tank and the methanol day tank (23) which are arranged side by side in a ship length direction, and the methanol supply device (22) and the methanol valve group (25) are both arranged in the methanol facility tank, and the methanol facility tank is located at a rear side of the methanol day tank (23).

7. The dual fuel container ship as claimed in any of claims 1-6, characterized in that the superstructure (13) is provided with the filling stations (261) on both sides in the ship width direction, each filling station (261) being connected to the methanol storage tank (21).

8. The dual fuel container ship as claimed in any of claims 1-6, characterized in that the distance between the outer tank wall of the insulated empty tank (16) and the corresponding wall of the methanol storage tank (21) or the methanol fuel processing tank is 800-2000 mm.

9. The dual fuel container ship as claimed in any of the claims 1-6, characterized in that it further comprises an inerting purge system for inerting and/or purging the methanol day tank (23), the methanol storage tank (21) and the methanol supply device (22).

10. The dual-fuel container ship as claimed in claim 9, wherein a nitrogen equipment room (15) is arranged in the engine room (11), the inerting purging system comprises a nitrogen generating device and a nitrogen storage device which are arranged in the nitrogen equipment room (15), the nitrogen generating device is connected with the nitrogen storage device, and the nitrogen storage device is respectively communicated with the methanol daily tank (23), the methanol storage tank (21) and the methanol supply device (22) through pipelines.