Marine engine fuel supply system for compression-ignitable and low-flashpoint green fuel

Abstract

A marine engine fuel supply system for compression-ignitable and low-flashpoint green fuel, comprising a low-flashpoint fuel module, a diesel fuel module, a purge module, a detection module, and an engine (11), wherein both the low-flashpoint fuel module and the diesel fuel module are connected to the engine (11), and both the purge module and the detection module are connected to the low-flashpoint fuel module. In the supply system, a low-flashpoint fuel module and a diesel fuel module are arranged, so that diesel can be supplied to an engine (11) when damage or leakage occurs to the low-flashpoint fuel module, thereby reducing the shutdown time of the engine (11); and a detection module and a purge module are arranged to respectively monitor the fuel leakage in the low-flashpoint fuel module and clean in time the residual low-flashpoint fuel when the leakage failure occurs to the low-flashpoint fuel module, thereby ensuring the intrinsic safety of low-flashpoint fuel and ensuring that the marine engine (11) does not lose power due to accidents.

Description

Marine engine fuel supply system for pressurized combustion, low flash point green fuel TECHNICAL FIELD

[0001] The present application relates to the technical field of marine engines, in particular to a marine engine fuel supply system for pressurized combustion, low flash point green fuel. BACKGROUND

[0002] Pressurized combustion, low flash point green fuel (such as dimethyl ether, polymethoxy dimethyl ether or a certain proportion of mixture thereof with methanol, etc.) can be directly pressurized without the need for pilot oil, so they can be used as alternative fuels for diesel engines. Moreover, since these fuels can be synthesized by green hydrogen and green carbon, they can also be used as key fuels to meet the national low-carbon and zero-carbon strategic development. However, these fuels have the characteristics of low flash point and low vapor pressure, and are gaseous at normal temperature and pressure, volatile, and liquid after pressurization or cooling. Gaseous low flash point fuel leaks in the air can easily explode, so if they are used as marine engine fuel, the "intrinsic safety" and "marine engine not losing power due to accidental loss" must be ensured.

[0003] Therefore, the present application provides a supply system for pressurized combustion, low flash point fuel for marine low-speed engines, which meets the stable operation requirements of marine engines. SUMMARY

[0004] The technical problem to be solved by the present application is to ensure the intrinsic safety of fuels with low flash points such as dimethyl ether when used as marine engine fuel and to ensure that the marine engine does not lose power due to accidental loss.

[0005] To solve the above technical problems, the technical solution of the present application is to provide a marine engine fuel supply system for pressurized combustion, low flash point green fuel, comprising a low flash point fuel module, a diesel fuel module, a purging module, a detection module and an engine, the low flash point fuel module and the diesel fuel module are connected to the engine, the purging module and the detection module are connected to the low flash point fuel module, wherein,

[0006] The low flash point fuel module is used to supply low flash point fuel to the engine and recover, comprising a low flash point fuel tank containing low flash point fuel, the temperature of the low flash point fuel tank is lower than the saturated vapor pressure temperature of the internal low flash point fuel;

[0007] The diesel fuel module is used to supply diesel fuel to the engine;

[0008] The purging module is used to purge the residual fuel in the low flash point fuel module;

[0009] The detection module is used to monitor whether the low flash point fuel leaks.

[0010] Optionally, the low flash point fuel module further comprises a low flash point fuel delivery pump, a low flash point fuel booster pump, a low flash point fuel heat exchanger and a low flash point fuel filter, the low flash point fuel tank, the low flash point fuel delivery pump, the low flash point fuel booster pump, the low flash point fuel heat exchanger and the low flash point fuel filter are sequentially connected by low flash point fuel pipelines, the low flash point fuel filter is connected with the low flash point fuel inlet of the engine, and a gate valve is arranged between the low flash point fuel filter and the low flash point fuel inlet of the engine, the low flash point fuel outlet of the engine is connected with the low flash point fuel tank, and a gate valve is arranged between the low flash point fuel outlet of the engine and the low flash point fuel tank.

[0011] Optionally, bypass valves are arranged between the low flash point fuel delivery pump and the low flash point fuel booster pump and between the low flash point fuel booster pump and the low flash point fuel heat exchanger, and the bypass valves are connected to the low flash point fuel tank.

[0012] Optionally, the detection module comprises an engine inlet double-wall pipe and an engine outlet double-wall pipe, the low flash point fuel module is connected with the low flash point fuel inlet of the engine through the engine inlet double-wall pipe and is connected with the low flash point fuel outlet of the engine through the engine outlet double-wall pipe, the inner wall of the engine inlet double-wall pipe and the engine outlet double-wall pipe is used for fuel flow, the outer pipe between the inner wall and the outer wall is in communication, the outer pipe of the engine outlet double-wall pipe is filled with air, the outer pipe of the engine inlet double-wall pipe is provided with a ventilation pipeline in communication with the outside, and a fan and a hydrocarbon monitoring sensor are arranged on the ventilation pipeline.

[0013] Optionally, a rotary valve is arranged at the low flash point fuel inlet and the low flash point fuel outlet of the engine.

[0014] Optionally, the purge module comprises a nitrogen source and a gas-liquid separator, the nitrogen source is connected between the low flash point fuel filter and the engine inlet double-wall pipe through a purge pipeline, the gas-liquid separator is connected between the low flash point fuel filter and the engine inlet double-wall pipe, between the low flash point fuel tank and the engine outlet double-wall pipe and between the low flash point fuel heat exchanger and the low flash point fuel filter through purge pipelines respectively, gate valves are arranged on the purge pipelines, and a ventilation opening is arranged above the gas-liquid separator.

[0015] Optionally, a nitrogen discharge pipeline is arranged on the low flash point fuel tank, and a gate valve is arranged on the nitrogen discharge pipeline.

[0016] Optionally, the diesel fuel module comprises a diesel fuel tank, a diesel delivery pump, a diesel return tank, a fuel booster pump and a diesel heat exchanger, the diesel fuel tank, the diesel delivery pump, the diesel return tank, the fuel booster pump and the diesel heat exchanger are sequentially connected by diesel pipelines, the diesel heat exchanger is connected with the diesel inlet of the engine, the diesel outlet of the engine is connected with the diesel return tank, and gate valves are arranged on the diesel inlet and outlet pipelines of the engine.

[0017] Optionally, a diesel coarse filter is arranged between the diesel delivery pump and the diesel return tank, and a diesel fine filter is arranged between the diesel heat exchanger and the engine.

[0018] Optionally, a bypass valve is arranged between the diesel delivery pump and the diesel coarse filter, and the bypass valve is connected to the diesel fuel tank.

[0019] In summary, the low-flashpoint fuel module and the diesel fuel module are arranged, the engine can be supplied with diesel fuel when the low-flashpoint fuel module is damaged or leaks, the engine downtime is reduced, the purge module and the detection module are arranged, the fuel leakage in the low-flashpoint fuel module is monitored, the residual low-flashpoint fuel is cleaned in time after the low-flashpoint fuel module leaks, the intrinsic safety of the low-flashpoint fuel is ensured, and the marine engine is ensured not to lose power due to accidents. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a structural principle diagram of the system of the present application.

[0021] In the figure: 1, low-flashpoint fuel tank; 2, low-flashpoint fuel delivery pump; 3, low-flashpoint fuel booster pump; 4, low-flashpoint fuel heat exchanger; 5, low-flashpoint fuel filter; 6, first gate valve; 7, second gate valve; 8, eighth gate valve; 9, engine inlet double-wall pipe; 10, engine outlet double-wall pipe; 11, engine; 12, air blower; 13, third gate valve; 14, fourth gate valve; 15, fifth gate valve; 16, sixth gate valve; 17, seventh gate valve; 18, gas-liquid separator; 19, first bypass valve; 20, second bypass valve; 21, diesel fuel tank; 22, diesel delivery pump; 23, diesel coarse filter; 24, diesel return tank; 25, fuel booster pump; 26, diesel heat exchanger; 27, diesel fine filter; 28, eleventh gate valve; 29, ninth gate valve; 30, nitrogen source; 31, third bypass valve; 32, tenth gate valve; 33, hydrocarbon monitoring sensor; 34, thirteenth gate valve; 35, twelfth gate valve. DETAILED DESCRIPTION

[0022] The present application will be further described in detail below in combination with Fig. 1.

[0023] The present application discloses a marine engine fuel supply system for compressible and low-flashpoint green fuel, referring to Fig. 1, comprising a low-flashpoint fuel module, a diesel fuel module, a purge module, a detection module and an engine 11, the low-flashpoint fuel module and the diesel fuel module are connected to the engine 11, the purge module and the detection module are connected to the low-flashpoint fuel module, wherein,

[0024] The low-flashpoint fuel module is used for supplying and recovering low-flashpoint fuel for the engine 11, comprising a low-flashpoint fuel tank 1 for carrying low-flashpoint fuel, the temperature of the low-flashpoint fuel tank 1 is lower than the saturated vapor pressure temperature of the internal low-flashpoint fuel, so as to ensure that the internal low-flashpoint fuel is liquid;

[0025] The diesel fuel module is used to supply diesel fuel for the engine 11;

[0026] The purge module is used to purge the residual fuel in the low flash point fuel module;

[0027] The detection module is used to monitor whether the low flash point fuel leaks.

[0028] In a further embodiment, the low flash point fuel module further comprises a low flash point fuel delivery pump 2, a low flash point fuel booster pump 3, a low flash point fuel heat exchanger 4 and a low flash point fuel filter 5, the low flash point fuel tank 1, the low flash point fuel delivery pump 2, the low flash point fuel booster pump 3, the low flash point fuel heat exchanger 4 and the low flash point fuel filter 5 are connected in sequence through low flash point fuel pipes, the low flash point fuel filter 5 is connected with the low flash point fuel inlet of the engine 11, and a gate valve is arranged therebetween, the low flash point fuel outlet of the engine 11 is connected with the low flash point fuel tank 1, and a gate valve is arranged between the low flash point fuel outlet of the engine 11 and the low flash point fuel tank 1, bypass valves are arranged between the low flash point fuel delivery pump 2 and the low flash point fuel booster pump 3 and between the low flash point fuel booster pump 3 and the low flash point fuel heat exchanger 4, and the outlet of the bypass valves is connected to the low flash point fuel tank 1;

[0029] Specifically, the low flash point fuel delivery pump 2 and the low flash point fuel booster pump 3 pressurize the low flash point fuel to meet the engine supply pressure requirement, the low flash point fuel heat exchanger 4 can reduce the temperature of the pressurized low flash point fuel, the low flash point fuel filter 5 can meet the precision requirement of the low flash point fuel into the engine, the first gate valve 6 and the second gate valve 7 are arranged between the low flash point fuel filter 5 and the low flash point fuel inlet of the engine 11 for the on-off of the low flash point fuel into the engine, the third gate valve 13 and the fourth gate valve 14 are arranged between the low flash point fuel outlet of the engine 11 and the low flash point fuel tank 1 for the backflow of the low flash point fuel, the first bypass valve 19 is arranged between the low flash point fuel delivery pump 2 and the low flash point fuel booster pump 3, the second bypass valve 20 is arranged between the low flash point fuel booster pump 3 and the low flash point fuel heat exchanger 4, and the first bypass valve 19 and the second bypass valve 20 are both connected to the low flash point fuel tank 1 for controlling the flow of the low flash point fuel back to the low flash point fuel tank 1 to control the flow or pressure of the low flash point fuel into the engine.

[0030] In further embodiments, the detection module comprises an inlet double-wall pipe 9 and an outlet double-wall pipe 10, the low flash point fuel module is connected to the low flash point fuel inlet of the engine 11 through the inlet double-wall pipe 9 and to the low flash point fuel outlet of the engine 11 through the outlet double-wall pipe 10, the inner wall of the inlet double-wall pipe 9 and the outlet double-wall pipe 10 is used for fuel flow, the outer pipe between the inner wall and the outer wall is in communication with each other, and the outer pipe of the outlet double-wall pipe 10 is filled with air, the outer pipe of the inlet double-wall pipe 9 is provided with a ventilation pipe in communication with the outside, the ventilation pipe is provided with a fan 12 and a hydrocarbon monitoring sensor 33, and the low flash point fuel inlet and the low flash point fuel outlet of the engine 11 are provided with a rotary valve, wherein,

[0031] The inlet double-wall pipe 9 is used for low flash point fuel or diesel engine inlet, and the outlet double-wall pipe 10 is used for low flash point fuel engine outlet, the inner pipe of the two is used for fuel flow, the outer pipe is used for air extraction and low flash point fuel leakage monitoring to ensure engine intrinsic safety, the inlet double-wall pipe 9 and the outlet double-wall pipe 10 of the engine 11 are not connected in normal operation of the low flash point fuel mode, and are respectively used for low flash point fuel inlet and outlet, and in the case of failure of the low flash point fuel mode, the rotary valve in the engine 11 makes the inlet double-wall pipe 9 and the outlet double-wall pipe 10 communicate.

[0032] In further embodiments, the purge module comprises a nitrogen source 30 and a gas-liquid separator 18, the nitrogen source 30 is used to provide nitrogen required for low flash point fuel purge, the purge pressure of the nitrogen source 30 is greater than or equal to the pressure in the low flash point fuel tank 1 + 5 bar, the nitrogen source 30 is connected between the low flash point fuel filter 5 and the inlet double-wall pipe 9 through a purge pipe, the gas-liquid separator 18 is connected between the low flash point fuel filter 5 and the inlet double-wall pipe 9, between the low flash point fuel tank 1 and the outlet double-wall pipe 10, and between the low flash point fuel heat exchanger 4 and the low flash point fuel filter 5 through a purge pipe, and the purge pipe is provided with a gate valve, the gas-liquid separator 18 is provided with a ventilation opening above, the low flash point fuel tank 1 is provided with a nitrogen discharge pipe, and the nitrogen discharge pipe is provided with a gate valve;

[0033] Specifically, the nitrogen source 30 is provided with two outlets, one of which is connected between the low flash point fuel filter 5 and the first gate valve 6 through a purge pipeline, and the purge pipeline is provided with a ninth gate valve 29, and the other outlet is connected between the second gate valve 7 and the out-machine double-wall pipe 9 through a purge pipeline, and the purge pipeline is provided with an eighth gate valve 8, and the ninth gate valve 29 and the eighth gate valve 8 are used for nitrogen purge cut-off, and the gas-liquid separator 18 is provided with four inlets, which are respectively connected between the low flash point fuel heat exchanger 4 and the low flash point fuel filter 5, the first gate valve 6 and the second gate valve 7, the out-machine double-wall pipe 10 and the third gate valve 13, and the third gate valve 13 and the fourth gate valve 14 through purge pipelines, and the seventh gate valve 17, the thirteenth gate valve 34, the fifth gate valve 15 and the sixth gate valve 16 are respectively arranged on the respective purge pipelines, and the nitrogen discharge pipeline on the low flash point fuel tank 1 is provided with a tenth gate valve 32.

[0034] In a further embodiment, the diesel fuel module comprises a diesel fuel tank 21, a diesel delivery pump 22, a diesel return tank 24, a fuel booster pump 25 and a diesel heat exchanger 26, which are sequentially connected through diesel pipelines, the diesel heat exchanger 26 is connected with the diesel inlet of the engine 11, the diesel outlet of the engine 11 is connected with the diesel return tank 24, and the diesel inlet and outlet pipelines of the engine 11 are both provided with gate valves, the diesel delivery pump 22 and the diesel return tank 24 are provided with a diesel coarse filter 23, the diesel heat exchanger 26 and the engine 11 are provided with a diesel fine filter 27, and the diesel delivery pump 22 and the diesel coarse filter 23 are provided with a bypass valve, which is connected with the diesel fuel tank 21.

[0035] Specifically, the diesel fine filter 27 and the diesel inlet of the engine 11 are provided with an eleventh gate valve 28, the diesel outlet of the engine 11 and the diesel return tank 24 are provided with a twelfth gate valve 35, the diesel delivery pump 22 and the diesel coarse filter 23 are provided with a third bypass valve 31, which is connected with the diesel fuel tank 21, and the third bypass valve 31 is used to control the diesel flow back to the diesel fuel tank 21 to control the diesel inlet flow or pressure of the engine 11, and the diesel return tank 24 is used to collect the diesel return of the engine 11 and is connected with the diesel delivered by the diesel delivery pump 22.

[0036] In the present application, all the gate valves can be driven by liquid or air. When the low flash point fuel module is in normal use, the diesel fuel module is kept in standby state. Diesel fuel flows out of the diesel fuel tank 21, passes through the diesel fuel delivery pump 22, the diesel fuel coarse filter 23, the diesel fuel return tank 24, the diesel fuel booster pump 25, the diesel fuel heat exchanger 26, and the diesel fuel fine filter 27 in sequence to the eleventh gate valve 28. The eleventh gate valve 28 and the twelfth gate valve 35 are closed, so that diesel fuel cannot enter the engine. The eighth gate valve 8 and the ninth gate valve 29 are closed to prevent nitrogen from entering the low flash point fuel pipeline. The fifth gate valve 15, the sixth gate valve 16, the seventh gate valve 17, and the thirteenth gate valve 34 are closed to prevent fuel from flowing into the gas-liquid separator 18. The first gate valve 6 and the second gate valve 7 are opened.

[0037] The opening or closing of the fourth gate valve 14 and the third gate valve 13 depends on the fuel injector design of the engine 11. If there is backflow when the fuel injector of the engine 11 injects low flash point fuel, the fourth gate valve 14 and the third gate valve 13 are opened. If there is no backflow when the fuel injector of the engine 11 injects low flash point fuel, the fourth gate valve 14 and the third gate valve 13 are closed.

[0038] In this mode, low flash point fuel flows out of the low flash point fuel tank 1, passes through the low flash point fuel delivery pump 2, the low flash point fuel booster pump 3, the low flash point fuel heat exchanger 4, the low flash point fuel filter 5, the first gate valve 6, and the second gate valve 7 in sequence to enter the engine double-wall pipe 9, and then enters the engine 11 for injection and combustion. If there is backflow when the fuel injector of the engine 11 injects low flash point fuel, the backflowing low flash point fuel flows back to the low flash point fuel tank 1 through the third gate valve 13 and the fourth gate valve 14 in sequence. The fan 12 is continuously opened, and whether there is low flash point fuel leakage is detected by the hydrocarbon monitoring sensor 33 in the ventilation pipeline.

[0039] If the low flash point fuel module fails or the hydrocarbon monitoring sensor 33 detects low flash point fuel leakage, the first gate valve 6 and the second gate valve 7 are immediately closed, the fourth gate valve 14 and the third gate valve 13 are closed, the engine 11 is switched to diesel operation mode, the eleventh gate valve 28 and the twelfth gate valve 35 are opened, the engine double-wall pipe 9 and the out-engine double-wall pipe 10 are connected in the engine 11, the fuel injector only injects diesel, then the eighth gate valve 8 and the fifth gate valve 15 are opened, the pipeline of the engine double-wall pipe 9 and the out-engine double-wall pipe 10 is nitrogen purged, the residual low flash point fuel is blown out of the engine 11 and the related pipeline of the supply system, then the eighth gate valve 8 is closed, the ninth gate valve 29 and the seventh gate valve 17 are opened, the low flash point fuel engine related pipeline is nitrogen purged, then the seventh gate valve 17 is closed, the first gate valve 6 and the thirteenth gate valve 34 are opened, the fifth gate valve 15 is closed, the third gate valve 13 and the sixth gate valve 16 are opened, and the related pipeline is purged.

[0040] After the above purging is completed, the low flash point fuel supply pipeline all gate valves are closed, the tenth gate valve 32 is opened, the nitrogen purged into the low flash point fuel tank 1 is discharged, the low flash point fuel supply pipeline is free of residual gaseous fuel, and the purpose of ensuring intrinsic safety is achieved.

[0041] The present application can also use the diesel fuel module for normal operation, at which time, the low flash point fuel module supply pipeline all gate valves are closed, the eleventh gate valve 28 and the twelfth gate valve 35 are opened, and the fuel injector only injects diesel, and the engine 11 can enter the diesel operation mode.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A marine engine fuel supply system for a pressurizable, low flash point green fuel, characterized in that The application relates to a low-flashpoint fuel module, a diesel fuel module, a purging module, a detection module and an engine (11), wherein the low-flashpoint fuel module and the diesel fuel module are connected with the engine (11), the purging module and the detection module are connected with the low-flashpoint fuel module, wherein, the low-flashpoint fuel module is used for supplying low-flashpoint fuel to the engine (11) and recycling, and comprises a low-flashpoint fuel tank (1) for carrying low-flashpoint fuel, the temperature of the low-flashpoint fuel tank (1) is lower than the saturated vapor pressure temperature of the internal low-flashpoint fuel; the diesel fuel module is used for supplying diesel fuel to the engine (11); the purging module is used for purging residual fuel in the low-flashpoint fuel module; the detection module is used for monitoring whether the low-flashpoint fuel leaks.

2. Marine engine fuel supply system for pressurizable, low flash point green fuel according to claim 1, characterized in that the low-flashpoint fuel module further comprises a low-flashpoint fuel delivery pump (2), a low-flashpoint fuel booster pump (3), a low-flashpoint fuel heat exchanger (4) and a low-flashpoint fuel filter (5), the low-flashpoint fuel tank (1), the low-flashpoint fuel delivery pump (2), the low-flashpoint fuel booster pump (3), the low-flashpoint fuel heat exchanger (4) and the low-flashpoint fuel filter (5) are sequentially connected through a low-flashpoint fuel pipeline, the low-flashpoint fuel filter (5) is connected with a low-flashpoint fuel inlet of the engine (11), and a gate valve is arranged between the low-flashpoint fuel filter (5) and the low-flashpoint fuel inlet of the engine (11), a low-flashpoint fuel outlet of the engine (11) is connected with the low-flashpoint fuel tank (1), and a gate valve is arranged between the low-flashpoint fuel outlet of the engine (11) and the low-flashpoint fuel tank (1).

3. Marine engine fuel supply system for pressurizable, low flash point green fuel according to claim 2, characterized in that A bypass valve is arranged between the low-flashpoint fuel delivery pump (2) and the low-flashpoint fuel booster pump (3) and between the low-flashpoint fuel booster pump (3) and the low-flashpoint fuel heat exchanger (4), and the bypass valve is connected with the low-flashpoint fuel tank (1).

4. The marine engine fuel supply system for a pressurizable, low flash point green fuel as recited in claim 2, characterized by, The detection module comprises an engine inlet double-wall pipe (9) and an engine outlet double-wall pipe (10), the low-flashpoint fuel module is connected with the low-flashpoint fuel inlet of the engine (11) through the engine inlet double-wall pipe (9) and connected with the low-flashpoint fuel outlet of the engine (11) through the engine outlet double-wall pipe (10), the inner wall of the engine inlet double-wall pipe (9) and the engine outlet double-wall pipe (10) is used for fuel flow, the outer pipe between the inner wall and the outer wall is in communication, air is filled in the outer pipe of the engine outlet double-wall pipe (10), a ventilation pipeline is arranged on the outer pipe of the engine inlet double-wall pipe (9) and communicated with the outside, a fan (12) and a hydrocarbon monitoring sensor (33) are arranged on the ventilation pipeline.

5. The marine engine fuel supply system for pressurized combustible, low flash point green fuel according to claim 4, characterized in that, A rotary valve is arranged at the low-flashpoint fuel inlet and the low-flashpoint fuel outlet of the engine (11).

6. The marine engine fuel supply system for a pressurizable, low flash point green fuel as defined in claim 4, characterized in that, The purging module comprises a nitrogen source (30) and a gas-liquid separator (18), the nitrogen source (30) is connected between the low-flashpoint fuel filter (5) and the engine inlet double-wall pipe (9) through a purging pipeline, the gas-liquid separator (18) is connected between the low-flashpoint fuel filter (5) and the engine inlet double-wall pipe (9), between the low-flashpoint fuel tank (1) and the engine outlet double-wall pipe (10) and between the low-flashpoint fuel heat exchanger (4) and the low-flashpoint fuel filter (5) through purging pipelines, gate valves are arranged on the purging pipelines, and a ventilation opening is arranged above the gas-liquid separator (18).

7. Marine engine fuel supply system for pressurizable, low flash point green fuel according to claim 6, characterized in that The low flash point fuel tank (1) is provided with a nitrogen discharge pipeline, and the nitrogen discharge pipeline is provided with a gate valve.

8. The marine engine fuel supply system for a pressurizable, low flash point green fuel as defined in claim 1, characterized in that, The diesel fuel module comprises a diesel fuel tank (21), a diesel delivery pump (22), a diesel return tank (24), a fuel booster pump (25) and a diesel heat exchanger (26), the diesel fuel tank (21), the diesel delivery pump (22), the diesel return tank (24), the fuel booster pump (25) and the diesel heat exchanger (26) are sequentially connected through diesel pipelines, the diesel heat exchanger (26) is connected with a diesel inlet of the engine (11), a diesel outlet of the engine (11) is connected with the diesel return tank (24), and the diesel inlet and the diesel outlet pipelines of the engine (11) are both provided with gate valves.

9. Marine engine fuel supply system for pressurizable, low flash point green fuel according to claim 8, characterized in that The diesel delivery pump (22) and the diesel return tank (24) are provided with a diesel coarse filter (23), and the diesel heat exchanger (26) and the engine (11) are provided with a diesel fine filter (27).

10. The marine engine fuel supply system for a pressurizable, low flash point green fuel as defined in claim 8, characterized in that, The diesel delivery pump (22) and the diesel coarse filter (23) are provided with a bypass valve, and the bypass valve is connected with the diesel fuel tank (21).

Images