Container type power supply system for ship

Abstract

The utility model relates to the technical field of marine power supply systems, in particular to a marine container type power supply system which comprises a central control room and a power supply cabin. The power supply cabin comprises a generator cabin, a fuel preparation room, a nitrogen cylinder group room and a fuel cabin; the central control room is arranged at one end of the container, and the generator cabin is adjacent to the central control room; the fuel preparation room and the nitrogen cylinder group room are arranged between the generator cabin and the fuel cabin in parallel; a generator set is arranged in the generator cabin; a power distribution system is arranged in the central control room and comprises an alternating-current power distribution board and a direct-current power distribution board; the AC distribution board comprises a high-voltage AC bus and a low-voltage AC bus. According to the technical scheme, the central control room, the generator room, the fuel preparation room, the nitrogen cylinder group room and the fuel cabin are integrated into the standard marine container cabinet to form a complete power generation unit, and the complete power generation unit is installed on the ship clamping plate and can be conveniently hoisted and replaced.

Description

Technical Field

[0001] This application relates to the field of marine power supply systems, and in particular to a marine containerized power supply system. Background Technology

[0002] Electric-powered new energy ships have begun to appear on the market. While they offer good environmental benefits, they face significant challenges in terms of range. Ship transport often involves long journeys, and carrying spare batteries is extremely inconvenient, taking up considerable space and increasing the ship's weight. On the other hand, the lack of facilities along the route to extend the range of these new energy ships hinders their development.

[0003] To address the range anxiety issue of new energy electric ships, the primary approach currently is hybrid range-extending. The promotion and application of methanol as a new energy fuel in ships has also received support.

[0004] Methanol hybrid range extender systems, as a technical solution to address the short driving range of pure electric ships, have begun to be applied in marine applications. Due to the low flash point and flammability of methanol fuel, which is classified as a Class A hazardous substance, the China Classification Society has established strict regulations for the installation and use of methanol-related equipment and components to ensure the safety of methanol fuel in marine applications. For example, fuel tanks, fuel preparation rooms, and methanol wastewater storage tanks in range extender systems must maintain ventilation or airtight protection and isolation measures, and must maintain a certain safe distance from other equipment. However, existing methanol hybrid range extender systems are mostly installed in ship cabins. Due to the enclosed nature of cabin spaces, methanol vapor can easily accumulate, leading to dangerous incidents. This places very high demands on ship design, making the design process more complex, and also raises certain safety concerns regarding methanol application. Utility Model Content

[0005] The purpose of this application is to provide a marine containerized power supply system to solve at least one of the technical problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, this application provides a marine containerized power supply system, including a central control room and a power supply compartment;

[0007] The power supply compartment includes a generator compartment, a fuel preparation room, a nitrogen cylinder group room, and a fuel compartment.

[0008] The central control room is located at one end of the container, and the generator room is located adjacent to the central control room;

[0009] The fuel preparation room and the nitrogen cylinder group are arranged side by side between the generator compartment and the fuel compartment;

[0010] The generator compartment is equipped with a generator set;

[0011] The central control room is equipped with a power distribution system, including an AC power distribution board and a DC power distribution board;

[0012] The AC distribution board includes a high-voltage AC bus and a low-voltage AC bus;

[0013] The generator set is connected to the high-voltage AC bus via circuit breaker K1;

[0014] An external high-voltage power supply is connected to the high-voltage AC bus via an isolation transformer T1 and a circuit breaker K2.

[0015] The high-voltage AC busbar is connected to the low-voltage AC busbar through circuit breaker K3, isolation transformer T2, and circuit breaker K4;

[0016] The high-voltage AC busbar supplies power to external electrical loads through circuit breaker K5.

[0017] The low-voltage AC busbar supplies power to external electrical loads through circuit breaker K6.

[0018] The DC distribution board includes a first DC bus and a second DC bus;

[0019] The high-voltage AC bus is connected to the second DC bus via circuit breaker K7, inverter AFE and fuse F1;

[0020] The power battery is electrically connected to the second DC bus via circuit breaker K9, inverter DCC, and fuse F2;

[0021] The first DC bus and the second DC bus are connected by a circuit breaker K8;

[0022] The first DC bus is equipped with multiple power supply circuits for supplying power to multiple external electrical loads respectively, and each power supply circuit is equipped with a circuit breaker.

[0023] Furthermore, the central control room is an independent, enclosed space, and its adjacent area to the generator compartment is separated by A-60 fire-resistant material;

[0024] A combustible gas detector and an exhaust fan are installed on the ceiling of the central control room;

[0025] When the power supply system is working, the exhaust fan will automatically turn on to maintain forced ventilation in the control room and prevent combustible gases from being released into the control room and accumulating.

[0026] The combustible gas detector monitors the concentration of combustible gas in the central control room in real time. When the concentration of combustible gas reaches a preset proportion (preferably 20%) of its lower explosive limit, an audible and visual alarm signal is generated.

[0027] Furthermore, the generator compartment is a semi-enclosed independent space, with louvered partitions on its front and rear sides and top panel to increase the natural ventilation capacity of the generator compartment.

[0028] The generator compartment is equipped with a combustible gas detector and an exhaust fan on the top, and contains a methanol generator set with a rated power of 300KW and a rated voltage of AC400V / 50Hz.

[0029] When the methanol generator set is working, the combustible gas detector monitors the concentration of combustible gas in the generator compartment in real time. When the concentration of combustible gas reaches 20% of its lower explosive limit, an audible and visual alarm signal is triggered, and the exhaust fan is started to force ventilation.

[0030] The three-phase AC output lines of the methanol generator set are protected by stainless steel pipes and pass through a partition to enter the central control room. Fireproof sealing material is used to seal both ends of the stainless steel pipes and the penetration points of the partition.

[0031] The methanol fuel supply pipeline in the generator compartment is a double-walled pipe with an inner pipe diameter of 20mm and an outer pipe diameter of 80mm. The material used is 304L, and the cavity between the inner and outer pipes is nitrogen-sealed with 1kpag of nitrogen gas.

[0032] Furthermore, the fuel preparation room is a semi-enclosed independent space with louvered partitions on the side and top panels to increase the natural ventilation capacity of the fuel preparation room. At the same time, a combustible gas detector and an exhaust fan are installed on the top.

[0033] Furthermore, the fuel tank is connected to the engine in the generator compartment via a methanol fuel pipeline within the fuel preparation room;

[0034] Multiple shut-off valves are connected in series on the methanol fuel pipeline, and a working component is provided between two adjacent shut-off valves.

[0035] The working components include a pre-pump filter 2-2, a methanol pump 2-4, a flow meter 2-7, a pressure regulator 2-8, a methanol thermostat 2-10, and an FVT (double isolation double relief valve) 2-13;

[0036] The shut-off valves along the direction from the fuel tank to the generator compartment are shut-off valve 2-1, shut-off valve 2-3, shut-off valve 2-6, shut-off valve 2-9, shut-off valve 2-11 and shut-off valve 2-14, respectively.

[0037] A pre-pump filter 2-2 is provided between the shut-off valve 2-1 and the shut-off valve 2-3;

[0038] A methanol pump 2-4 is provided between the shut-off valve 2-3 and the shut-off valve 2-6;

[0039] A flow meter 2-7 and a pressure regulator 2-8 are sequentially arranged between the shut-off valves 2-6 and 2-9;

[0040] A methanol thermostat 2-10 is provided between the shut-off valve 2-9 and the shut-off valve 2-11;

[0041] An FVT (double isolation double relief valve) 2-13 is provided between the shut-off valve 2-11 and the shut-off valve 2-14;

[0042] The shut-off valves 2-1, 2-3, 2-6, 2-9 and 2-11 are in the open state during fuel delivery;

[0043] The methanol pumps 2-4 are turned on under control during operation, so that the fuel in the fuel tank enters the generator compartment through the methanol fuel pipeline.

[0044] The engine is the prime mover of the generator set;

[0045] The pipe connecting the remote control valve 2-15 to the methanol injection rail of the methanol generator set's engine is a double-walled pipe.

[0046] Furthermore, a liquid collection tray 4-1 is provided at the bottom of the fuel preparation room, and all working components on the methanol fuel pipeline are located above the liquid collection tray 4-1. Methanol fuel leaked during the operation of the working components falls into the liquid collection tray 4-1.

[0047] A level gauge 4-2 is installed in the collection tray 4-1. When the level gauge 4-2 detects that the liquid level in the collection tray 4-1 exceeds the set value, the remote control valve 4-3 is opened and the sewage pump 4-4 is started to collect the methanol in the collection tray into the alcohol wastewater storage tank 5A.

[0048] The alcohol wastewater storage tank 5A is sealed with 1 kPag of nitrogen and is equipped with a pressure sensor 5-2.

[0049] When pressure sensor 5-2 detects that the internal pressure of the alcohol wastewater storage tank 5A is lower than the set value, remote control valve 3-28 is opened to complete the air replenishment.

[0050] When the level gauge 5-1 detects that the liquid level exceeds the set value, the shut-off valve 5-5 or the remote control valve 5-6 is opened to discharge the liquid.

[0051] Furthermore, the nitrogen cylinder group is a semi-enclosed independent space, with louvered partitions on its side and top panels to increase the natural ventilation capacity between the nitrogen cylinder groups.

[0052] The nitrogen cylinder group is equipped with a combustible gas alarm device and an oxygen concentration sensor. When the oxygen concentration is lower than the preset ratio (preferably 19.5%), an audible and visual alarm signal is issued to remind the staff to check for nitrogen leaks.

[0053] The nitrogen cylinder group is equipped with nitrogen cylinders containing nitrogen. The nitrogen is used for inerting. The storage quantity is configured to ensure the nitrogen supply for one port arrival and two weeks in port, and to maintain the gas environment in which the oxygen content of methanol daily use room 1A and methanol wastewater storage tank 5A does not exceed the preset critical value (preferably 5%) by volume ratio.

[0054] The nitrogen cylinder uses a 15 MPa / 45 L high-pressure nitrogen cylinder with a nitrogen purity >97%.

[0055] The nitrogen inerting pressure of methanol daily use room 1A and methanol wastewater storage tank 5A is 1 kPag.

[0056] Furthermore, the nitrogen cylinder group is connected to the methanol daily use room 1A and the alcohol wastewater storage tank 5A via the shut-off valve 3-22, nitrogen filter 3-23 and pressure reducing valve 3-24.

[0057] When the oxygen content in methanol daily use room 1A is detected to be no more than the preset critical value (preferably 5%), the remote control valve 3-26 is opened to introduce nitrogen from the nitrogen cylinder group room for replenishment;

[0058] When the oxygen content in the alcohol wastewater storage tank 5A is detected to be no more than the preset critical value (preferably 5%), the remote control valve 3-28 is opened to introduce nitrogen from the nitrogen cylinder group for replenishment.

[0059] Furthermore, a cleaning pipe is also connected between two adjacent shut-off valves on the methanol fuel pipeline;

[0060] The cleaning pipeline starts from the nitrogen cylinder group room, and after passing through the shut-off valve 3-1, nitrogen filter 3-2 and pressure reducing valve, it is divided into multiple branches. Each branch is equipped with a remote control valve and a check valve and is connected to the methanol fuel pipeline. After passing through the remote control valve, it is connected to the methanol daily use room 1A.

[0061] When the working components need to be cleaned, close the shut-off valves on both sides of the group, open the valves on the cleaning pipeline connected between the shut-off valves on both sides, and open the nitrogen cylinder to fill the cleaning pipeline with nitrogen, so as to blow the residual methanol in the working components back to the methanol daily use room 1A.

[0062] Furthermore, the fuel tank is a semi-enclosed independent space, and the front and rear sides, side panels and top panel of the fuel tank are equipped with louvered partitions to increase the natural ventilation capacity of the fuel tank.

[0063] The top of the fuel tank is equipped with a combustible gas detector and an exhaust fan.

[0064] Furthermore, a methanol daily use room 1A is provided inside the fuel tank, and an isolation chamber 1B with a width of 600mm is provided outside the methanol daily use room. Nitrogen gas with a pressure of 1kpag is injected into the isolation chamber for sealing.

[0065] Furthermore, the methanol daily use room 1A is equipped with a methanol filling port 1-1, an oxygen concentration sensor 1-2, a high-speed venting safety valve 1-3, a venting mast 1-4, a first alarm level gauge 1-5, a second alarm level gauge 1-6, a pressure sensor 1-7, and a temperature sensor 1-8.

[0066] When the methanol level in the daily use room 1A exceeds the first level (preferably 95%), the second alarm level gauges 1-6 will issue an audible and visual alarm signal.

[0067] When the methanol level in the daily use room 1A exceeds the first level (preferably 98%), the first alarm level gauge 1-5 will issue an audible and visual alarm signal and close the methanol filling port 1-1.

[0068] When oxygen concentration sensor 1-2 detects that the oxygen concentration in the gas in methanol daily use room 1A is greater than 5%, it issues an audible and visual alarm signal and opens remote control valve 3-26 to replenish nitrogen.

[0069] The high-speed venting safety valve 1-3 has a negative pressure of -0.007 MPa, a positive pressure of 0.021 MPa, and an outlet speed of >30 m / s. The high-speed venting safety valve 1-3 is used to balance the pressure in the methanol daily use room 1A. The outlet is connected to the venting mast 1-4, which is more than 6 meters higher than the open-air clamping plate.

[0070] When temperature sensors 1-8 detect that the temperature inside methanol daily use room 1A is higher than the preset critical temperature (preferably 45°C), an alarm is triggered and a reminder is given to adjust the temperature by venting nitrogen.

[0071] By adopting the above technical solution, this application has the following beneficial effects:

[0072] (1) By integrating key components such as the central control room and power supply compartment (including generator compartment, fuel preparation room, nitrogen cylinder group room and fuel tank) into the container, the modular design of the system is realized, which facilitates rapid deployment and maintenance on ships and improves space utilization.

[0073] (2) The power supply system adopts a dual power supply mode of generator set and external high voltage power supply. The AC distribution board and DC distribution board realize the rational distribution and conversion of electrical energy, which not only ensures the reliability of power supply, but also meets the power demand of different loads. In addition, the system also supports flexible adjustment of power supply strategy according to load conditions.

[0074] (3) Key areas such as the central control room and generator room are separated by A-60 fireproof materials and equipped with safety equipment such as combustible gas detectors and exhaust fans to monitor and process combustible gas concentrations in real time, effectively preventing fire and explosion accidents. At the same time, the system also has intelligent monitoring functions, which can automatically alarm and take corresponding safety measures.

[0075] (4) By optimizing the ventilation design and adopting clean energy technologies such as methanol generator sets, the system can operate stably in harsh marine environments and reduce greenhouse gas emissions, meeting environmental protection requirements.

[0076] (5) Key areas such as the fuel preparation room, fuel tank and methanol daily use room adopt double-walled pipes, shut-off valves, working components and nitrogen sealing technologies to achieve precise fuel management and nitrogen inerting, effectively prevent methanol fuel leakage and oxygen intrusion, and improve the safety and stability of the system.

[0077] (6) The system is designed with maintenance equipment such as a collection tray, level gauge, and remote control valve to facilitate the collection and treatment of leaked methanol. At the same time, the design of nitrogen replenishment and cleaning pipelines between nitrogen cylinder groups enables the cleaning and nitrogen replenishment of working components, improving the maintainability and troubleshooting efficiency of the system. Attached Figure Description

[0078] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0079] Figure 1 A floor plan showing the functional areas of a containerized power supply system for marine applications.

[0080] Figure 2 This is a diagram of the power distribution system for the central control room.

[0081] Figure 3 This is a schematic diagram of the methanol fuel supply system.

[0082] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0083] Figure 5 for Figure 3 A magnified view of a portion of region B in the middle;

[0084] Figure 6 for Figure 3 A magnified view of a portion of region C. Detailed Implementation

[0085] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0086] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0087] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0088] It should also be noted that the specific embodiments or implementation methods described below are a series of optimized settings listed in this application to further explain the specific application content, and these settings can be combined or used in conjunction with each other.

[0089] The present application will be further explained below with reference to specific implementation methods.

[0090] Example 1

[0091] like Figure 1-2 As shown, this embodiment provides a marine containerized power supply system, including a central control room 11 and a power supply compartment;

[0092] The power supply compartment includes a generator compartment 12, a fuel preparation room 13, a nitrogen cylinder group room 14, and a fuel compartment 15.

[0093] The central control room 11 is located at one end of the container, and the generator room 12 is located adjacent to the central control room 11;

[0094] The fuel preparation room 13 and the nitrogen cylinder group room 14 are arranged side by side between the generator room 12 and the fuel room 15;

[0095] The generator compartment 12 is equipped with a generator set;

[0096] The central control room 11 is equipped with a power distribution system, including an AC power distribution board and a DC power distribution board;

[0097] The AC distribution board includes a high-voltage AC bus and a low-voltage AC bus;

[0098] The generator set is connected to the high-voltage AC bus via circuit breaker K1;

[0099] An external high-voltage power supply is connected to the high-voltage AC bus via an isolation transformer T1 and a circuit breaker K2.

[0100] The high-voltage AC busbar is connected to the low-voltage AC busbar through circuit breaker K3, isolation transformer T2, and circuit breaker K4;

[0101] The high-voltage AC busbar supplies power to external electrical loads through circuit breaker K5.

[0102] The low-voltage AC busbar supplies power to external electrical loads through circuit breaker K6.

[0103] The DC distribution board includes a first DC bus and a second DC bus;

[0104] The high-voltage AC bus is connected to the second DC bus via circuit breaker K7, inverter AFE and fuse F1;

[0105] The power battery is electrically connected to the second DC bus via circuit breaker K9, inverter DCC, and fuse F2;

[0106] The first DC bus and the second DC bus are connected by a circuit breaker K8;

[0107] The first DC bus is equipped with multiple power supply circuits for supplying power to multiple external electrical loads respectively, and each power supply circuit is equipped with a circuit breaker.

[0108] The power distribution system in the central control room 11 includes an AC distribution board and a DC distribution board. The AC distribution board is divided into an AC400V high-voltage AC bus and an AC220V low-voltage AC bus. The AC400V AC bus is equipped with two parallel three-phase inputs, forming a redundant configuration. One input is the three-phase output of the generator set G of the power generation device in this application, which is connected to the AC400V bus via AC circuit breaker K1. The other input is an external three-phase line, which is connected to the AC400V bus via isolation transformer T1 and AC circuit breaker K2. The external three-phase line can be the output of the AC400V bus of another independent containerized power generation device. The AC220V bus is taken from one phase of the AC400V bus and connected to the AC220V bus via AC circuit breaker K3, isolation transformer T2, and AC circuit breaker K4. The AC400V AC bus supplies power to the external electrical loads via AC circuit breaker K5, and the AC220V AC bus supplies power to the external electrical loads via AC circuit breaker K6. The DC distribution board consists of two DC bus sections with two inputs. One input is taken from the AC 400V AC bus and connected to the first DC bus DC_BUS1 via AC circuit breaker K7, inverter AFE, and fuse F1. The other input is taken from the power battery BAT and connected to the second DC bus DC_BUS2 via DC circuit breaker K9, inverter DCC, and fuse F2. The two bus sections DC_BUS1 and DC_BUS2 are connected together via DC circuit breaker K8 and supplied to external loads through circuit breakers K10 and K11.

[0109] By adopting the above technical solution, this application has the following beneficial effects:

[0110] (1) By integrating the central control room 11 and the power supply compartment into the container, the power supply system is highly integrated and modularized. This design not only reduces the footprint and improves space utilization, but also facilitates the transportation, installation and commissioning of the system. At the same time, the modular design allows each component of the system to be replaced or upgraded independently, reducing maintenance costs.

[0111] (2) The AC distribution board adopts a redundant configuration, that is, the AC400V high-voltage AC bus is composed of two inputs in parallel: the generator set and the external three-phase line, which ensures the stability and reliability of power supply. Even if one input fails, the other can continue to supply power, avoiding the risk of a complete power outage due to a single fault.

[0112] (3) The system has flexible power distribution and conversion functions. The AC distribution board can supply power to external electrical loads of AC400V and AC220V respectively, meeting the voltage requirements of different equipment. At the same time, the DC distribution board realizes flexible power conversion and distribution through the design of two DC bus sections, further improving the flexibility and adaptability of the system.

[0113] (4) The power battery serves as a backup power source and is connected to the second DC bus via the inverter DCC, providing emergency power support when the generator set is unable to supply power. In addition, the system can also achieve efficient energy management and utilization by adjusting the operating status of the inverter AFE and DCC according to actual needs.

[0114] (5) Circuit breakers are installed on each power supply circuit of the system, which can quickly cut off the power supply in the event of a fault, preventing the fault from spreading and the risk of electric shock to personnel. At the same time, the installation of fuses also provides additional short-circuit protection, further enhancing the safety performance of the system.

[0115] Example 2

[0116] like Figure 1-6 As shown in the figure, this embodiment provides a marine containerized power supply system, wherein the central control room 11 is an independent enclosed space, and the adjacent part of the generator room 12 is separated by A-60 fireproof material;

[0117] A combustible gas detector and an exhaust fan are installed on the ceiling of the central control room 11.

[0118] When the power supply system is working, the exhaust fan will be automatically turned on to maintain forced ventilation in the central control room 11 and prevent combustible gases from being released into the central control room 11 and accumulating.

[0119] The combustible gas detector monitors the concentration of combustible gas in the central control room 11 in real time. When the concentration of combustible gas reaches 20% of its lower explosive limit, an audible and visual alarm signal is triggered.

[0120] As a further embodiment of this application, the generator compartment 12 is a semi-enclosed independent space, and its front and rear sides and top panel are provided with louvered partitions to increase the natural ventilation capacity of the generator compartment 12.

[0121] The generator compartment 12 is equipped with a combustible gas detector and an exhaust fan on its top, and is equipped with a methanol generator set with a rated power of 300KW and a rated voltage of AC400V / 50Hz.

[0122] When the methanol generator set is working, the combustible gas detector monitors the concentration of combustible gas in the generator compartment 12 in real time. When the concentration of combustible gas reaches 20% of its lower explosive limit, an audible and visual alarm signal is triggered, and the exhaust fan is started to force ventilation.

[0123] The three-phase AC output of the methanol generator set is protected by stainless steel pipes and passes through a partition to enter the central control room 11. Fireproof sealing material is used to seal both ends of the stainless steel pipes and the penetration points of the partition.

[0124] The methanol fuel supply pipeline in the generator compartment 12 is a double-walled pipe with an inner pipe diameter of 20mm and an outer pipe diameter of 80mm. The material used is 304L, and the cavity between the inner and outer pipes is nitrogen-sealed with 1kpag of nitrogen gas.

[0125] As a further embodiment of this application, the fuel preparation room 13 is a semi-enclosed independent space with louvered partitions on the side and top panels to increase the natural ventilation capacity of the fuel preparation room 13, and a combustible gas detector and an exhaust fan are installed on the top.

[0126] As a further embodiment of this application, the fuel tank 15 is connected to the engine of the generator compartment 12 via a methanol fuel pipeline in the fuel preparation room 13.

[0127] Multiple shut-off valves are connected in series on the methanol fuel pipeline, and a working component is provided between two adjacent shut-off valves.

[0128] The working components include a pre-pump filter 2-2, a methanol pump 2-4, a flow meter 2-7, a pressure regulator 2-8, a methanol thermostat 2-10, and an FVT (double isolation double relief valve) 2-13;

[0129] The function of the FVT is to isolate the methanol supply end and the engine end;

[0130] The shut-off valves along the direction from the fuel tank 15 to the generator compartment 12 are respectively shut-off valve 2-1, shut-off valve 2-3, shut-off valve 2-6, shut-off valve 2-9, shut-off valve 2-11 and shut-off valve 2-14;

[0131] A pre-pump filter 2-2 is provided between the shut-off valve 2-1 and the shut-off valve 2-3;

[0132] A methanol pump 2-4 is provided between the shut-off valve 2-3 and the shut-off valve 2-6;

[0133] A flow meter 2-7 and a pressure regulator 2-8 are sequentially arranged between the shut-off valves 2-6 and 2-9;

[0134] A methanol thermostat 2-10 is provided between the shut-off valve 2-9 and the shut-off valve 2-11;

[0135] An FVT (double isolation double relief valve) 2-13 is provided between the shut-off valve 2-11 and the shut-off valve 2-14;

[0136] The shut-off valves 2-1, 2-3, 2-6, 2-9 and 2-11 are in the open state during fuel delivery;

[0137] The methanol pump 2-4 is turned on under control during operation, so that the fuel in the fuel tank 15 enters the generator compartment 12 through the methanol fuel pipeline.

[0138] The engine is the prime mover of the generator set;

[0139] The pipe connecting the remote control valve 2-15 to the methanol injection rail of the methanol generator set's engine is a double-walled pipe.

[0140] As a further embodiment of this application, a liquid collection tray 4-1 is provided at the bottom of the fuel preparation room 13, and all working components on the methanol fuel pipeline are located above the liquid collection tray 4-1. Methanol fuel leaked by the working components during operation falls into the liquid collection tray 4-1.

[0141] A level gauge 4-2 is installed in the collection tray 4-1. When the level gauge 4-2 detects that the liquid level in the collection tray 4-1 exceeds the set value, the remote control valve 4-3 is opened and the sewage pump 4-4 is started to collect the methanol in the collection tray into the alcohol wastewater storage tank 5A.

[0142] The alcohol wastewater storage tank 5A is sealed with 1 kPag of nitrogen and is equipped with a pressure sensor 5-2.

[0143] When pressure sensor 5-2 detects that the internal pressure of the alcohol wastewater storage tank 5A is lower than the set value, remote control valve 3-28 is opened to complete the air replenishment.

[0144] When the level gauge 5-1 detects that the liquid level exceeds the set value, the shut-off valve 5-5 or the remote control valve 5-6 is opened to discharge the liquid.

[0145] The venting safety valve 5-3 is installed on the venting mast 5-4 and controls the opening and closing of the venting mast 5-4. The venting mast 5-4 is used to balance the pressure inside the alcohol wastewater storage tank 5A.

[0146] As a further embodiment of this application, the nitrogen cylinder group 14 is a semi-enclosed independent space, and its side and top panels are provided with louvered partitions to increase the natural ventilation capacity of the nitrogen cylinder group 14.

[0147] The nitrogen cylinder group 14 is equipped with a combustible gas alarm device and an oxygen concentration sensor. When the oxygen concentration is lower than 19.5%, an audible and visual alarm signal is issued to remind staff to check for nitrogen leaks.

[0148] The nitrogen cylinder group 14 is equipped with nitrogen cylinders containing nitrogen. Figure 3N2 in the text can be considered as a nitrogen cylinder, used to provide nitrogen to the fuel supply system. The nitrogen is used for inerting, and the storage quantity is configured to ensure the nitrogen supply for one port arrival and two weeks in port, and to maintain a gas environment in which the oxygen content in methanol daily use room 1A and methanol wastewater storage tank 5A does not exceed 5% by volume.

[0149] The nitrogen cylinder uses a 15 MPa / 45 L high-pressure nitrogen cylinder with a nitrogen purity >97%.

[0150] The nitrogen inerting pressure of methanol daily use room 1A and methanol wastewater storage tank 5A is 1 kPag.

[0151] As a further embodiment of this application, the nitrogen cylinder group 14 supplies nitrogen to the methanol daily use room 1A and the alcohol wastewater storage tank 5A after passing through the shut-off valve 3-22, the nitrogen filter 3-23 and the pressure reducing valve 3-24.

[0152] When the oxygen content in methanol daily use room 1A is detected to be no more than 5%, open the remote control valve 3-26 to introduce nitrogen into nitrogen cylinder group room 14 for replenishment;

[0153] When the oxygen content in the alcohol wastewater storage tank 5A is detected to be no more than 5%, open the remote control valve 3-28 to introduce nitrogen from the nitrogen cylinder group 14 for replenishment.

[0154] As a further embodiment of this application, a cleaning pipe is also connected between two adjacent shut-off valves on the methanol fuel pipeline;

[0155] The cleaning pipeline starts from the nitrogen cylinder group room 14, passes through the shut-off valve 3-1, nitrogen filter 3-2 and pressure reducing valve 3-24 and then splits into multiple branches. Each branch is equipped with a remote control valve (such as remote control valve 3-26, remote control valve 3-27 and remote control valve 3-28) and a check valve and is connected to the methanol fuel pipeline. After passing through the remote control valve, it is connected to the methanol daily use room 1A.

[0156] When the working components need to be cleaned, close the shut-off valves on both sides of the group, open the valves on the cleaning pipeline connected between the shut-off valves on both sides, and open the nitrogen cylinder to fill the cleaning pipeline with nitrogen, so as to blow the residual methanol in the working components back to the methanol daily use room 1A.

[0157] The nitrogen flushing pressure of the cleaning pipeline is 7 barg, the nitrogen output pressure of the pressure reducing valve 3-3 is 7 barg, and the pressure sensor 3-4 is installed at the output end of the pressure reducing valve 3-3 to detect the output pressure of the pressure reducing valve 3-3.

[0158] Similarly, a pressure sensor 3-25 is provided at the output end of the pressure reducing valve 3-24 to detect the output pressure of the pressure reducing valve 3-24.

[0159] As a further embodiment of this application, the fuel tank 15 is a semi-enclosed independent space, and the front and rear sides, side panels and top panel of the fuel tank 15 are provided with louvered partitions to increase the natural ventilation capacity of the fuel tank 15.

[0160] The top of the fuel tank 15 is equipped with a combustible gas detector and an exhaust fan.

[0161] As a further embodiment of this application, a methanol daily use room 1A is provided inside the fuel tank 15, and an isolation chamber 1B with a width of 600mm is provided outside the methanol daily use room. Nitrogen gas with a pressure of 1kpag is injected into the isolation chamber for sealing.

[0162] As a further embodiment of this application, the methanol daily use room 1A is provided with a methanol filling port 1-1, an oxygen concentration sensor 1-2, a high-speed venting safety valve 1-3, a venting mast 1-4, a first alarm level gauge 1-5, a second alarm level gauge 1-6, a pressure sensor 1-7, and a temperature sensor 1-8.

[0163] When the methanol level in the daily use room 1A exceeds 95%, the second alarm level gauges 1-6 will issue an audible and visual alarm signal.

[0164] When the methanol level in the daily use room 1A exceeds 98%, the first alarm level gauge 1-5 will issue an audible and visual alarm signal and close the methanol filling port 1-1.

[0165] When oxygen concentration sensor 1-2 detects that the oxygen concentration in the gas in methanol daily use room 1A is greater than 5%, it issues an audible and visual alarm signal and opens remote control valve 3-26 to replenish nitrogen.

[0166] The high-speed venting safety valve 1-3 has a negative pressure of -0.007 MPa, a positive pressure of 0.021 MPa, and an outlet speed of >30 m / s. The high-speed venting safety valve 1-3 is used to balance the pressure in the methanol daily use room 1A. The outlet is connected to the venting mast 1-4, which is more than 6 meters higher than the open-air clamping plate.

[0167] When temperature sensors 1-8 detect that the temperature inside methanol daily use room 1A is higher than 45℃, an alarm will be triggered and a reminder will be given to adjust the temperature by venting nitrogen.

[0168] By adopting the above technical solution, this application has the following beneficial effects:

[0169] (1) By using A-60 fire-resistant materials to separate the central control room from the generator room, and by installing combustible gas detectors and exhaust fans in critical areas, the risk of fire and explosion is effectively reduced. When the concentration of combustible gas reaches a dangerous level, the system will immediately issue an audible and visual alarm and start the exhaust fan for forced ventilation, thereby ensuring personnel safety and stable equipment operation.

[0170] (2) The methanol generator set in the generator compartment is protected by stainless steel pipes and sealed with fireproof sealing materials, which enhances the reliability and safety of electrical connections. At the same time, the fuel supply pipeline adopts a double-wall pipe design and prevents methanol leakage by nitrogen sealing, further improving the stability and reliability of the system.

[0171] (3) The setup of the fuel preparation room and fuel tank, as well as the various working components on the methanol fuel pipeline, such as the pre-pump filter, methanol pump, flow meter, pressure regulator, methanol thermostat, and FVT, enable precise control and efficient management of the fuel. This not only improves fuel utilization but also reduces environmental pollution and energy waste.

[0172] (4) Through the reasonable layout of the collection tray and working components, as well as the real-time monitoring of the level gauge and pressure sensor, the system can promptly detect and handle leakage problems. In addition, the design of the cleaning pipeline makes the cleaning of the working components more convenient, reducing maintenance costs and failure rate.

[0173] (5) The arrangement of nitrogen cylinder groups and the application of nitrogen inerting technology effectively reduced the oxygen content in the methanol daily use room and the methanol wastewater storage tank. At the same time, the design of the louvered partition increased the natural ventilation capacity of each area and improved the system's adaptability to harsh environments.

[0174] (6) The multiple shut-off valves and remote control valves on the methanol fuel pipeline allow the system to be flexibly adjusted according to actual needs. For example, when cleaning the working components, the relevant shut-off valves can be closed and the remote control valves can be opened for nitrogen flushing; when replenishing nitrogen, the corresponding remote control valves can be opened according to the data from the oxygen concentration sensor to replenish nitrogen.

[0175] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A marine containerized power supply system, characterized by, Including the central control room and power supply compartment; The power supply compartment includes a generator compartment, a fuel preparation room, a nitrogen cylinder group room, and a fuel compartment. The central control room is located at one end of the container, and the generator room is located adjacent to the central control room; The fuel preparation room and the nitrogen cylinder group are arranged side by side between the generator compartment and the fuel compartment; The generator compartment is equipped with a generator set; The central control room is equipped with a power distribution system, including an AC power distribution board and a DC power distribution board; The AC distribution board includes a high-voltage AC bus and a low-voltage AC bus; The generator set is connected to the high-voltage AC bus via circuit breaker K1; An external high-voltage power supply is connected to the high-voltage AC bus via an isolation transformer T1 and a circuit breaker K2. The high-voltage AC busbar is connected to the low-voltage AC busbar through circuit breaker K3, isolation transformer T2, and circuit breaker K4; The high-voltage AC busbar supplies power to external electrical loads through circuit breaker K5. The low-voltage AC busbar supplies power to external electrical loads through circuit breaker K6. The DC distribution board includes a first DC bus and a second DC bus; The high-voltage AC bus is connected to the second DC bus via circuit breaker K7, inverter AFE and fuse F1; The power battery is electrically connected to the second DC bus via circuit breaker K9, inverter DCC, and fuse F2; The first DC bus and the second DC bus are connected by a circuit breaker K8; The first DC bus is equipped with multiple power supply circuits for supplying power to multiple external electrical loads respectively, and each power supply circuit is equipped with a circuit breaker.

2. A marine containerized power supply system according to claim 1, characterized in that, The central control room is an independent, enclosed space, and is separated from the generator compartment by fireproof materials. A combustible gas detector and an exhaust fan are installed on the ceiling of the central control room; When the power supply system is working, the exhaust fan will automatically turn on to maintain forced ventilation in the control room and prevent combustible gases from being released into the control room and accumulating. The combustible gas detector monitors the concentration of combustible gas in the central control room in real time. When the concentration of combustible gas reaches the preset ratio of its lower explosive limit, an audible and visual alarm signal is triggered.

3. The marine containerized power supply system of claim 1, wherein, The generator compartment is a semi-enclosed independent space, with louvered partitions on its front, rear, sides and top panel to increase the natural ventilation capacity of the generator compartment. The generator compartment is equipped with a combustible gas detector and an exhaust fan on its top, and a methanol generator set is installed inside. When the methanol generator set is working, the combustible gas detector monitors the concentration of combustible gas in the generator compartment in real time. When the concentration of combustible gas reaches the preset ratio of its lower explosive limit, an audible and visual alarm signal is triggered, and the exhaust fan is started to force ventilation.

4. The marine containerized power supply system of claim 1, wherein, The fuel preparation room is a semi-enclosed independent space with louvered partitions on the side and top panels to increase the natural ventilation capacity of the fuel preparation room. At the same time, a combustible gas detector and an exhaust fan are installed on the top. The nitrogen cylinder group is a semi-enclosed independent space, with louvered partitions on its side and top panels to increase the natural ventilation capacity of the nitrogen cylinder group. The nitrogen cylinder group is equipped with a combustible gas alarm device and an oxygen concentration sensor. When the oxygen concentration is lower than the preset ratio, an audible and visual alarm signal is issued to remind the staff to check for nitrogen leaks. The nitrogen cylinder group is equipped with nitrogen cylinders containing nitrogen, which are used for inerting.

5. The marine containerized power supply system of claim 1, wherein, The fuel tank is a semi-enclosed independent space. The front and rear sides, sides and top panel of the fuel tank are equipped with louvered partitions to increase the natural ventilation capacity of the fuel tank. The top of the fuel tank is equipped with a combustible gas detector and an exhaust fan; The fuel tank is equipped with a methanol daily use room (1A), and an isolation chamber (1B) is set outside the methanol daily use room. Nitrogen gas is injected into the isolation chamber (1B) for sealing.

6. A marine containerized power supply system according to claim 5, characterized in that, The fuel tank is connected to the engine in the generator compartment via a methanol fuel pipeline in the fuel preparation room. Multiple shut-off valves are connected in series on the methanol fuel pipeline, and a working component is provided between two adjacent shut-off valves. The working components include a pre-pump filter (2-2), a methanol pump (2-4), a flow meter (2-7), a pressure regulator (2-8), a methanol thermostat (2-10), and an FVT (2-13). The shut-off valves along the direction from the fuel tank to the generator compartment are shut-off valve (2-1), shut-off valve (2-3), shut-off valve (2-6), shut-off valve (2-9), shut-off valve (2-11) and shut-off valve (2-14). A pre-pump filter (2-2) is provided between the shut-off valve (2-1) and the shut-off valve (2-3); A methanol pump (2-4) is provided between the shut-off valve (2-3) and the shut-off valve (2-6). A flow meter (2-7) and a pressure regulator (2-8) are sequentially arranged between the shut-off valve (2-6) and the shut-off valve (2-9). A methanol thermostat (2-10) is provided between the shut-off valve (2-9) and the shut-off valve (2-11). An FVT (2-13) is provided between the shut-off valve (2-11) and the shut-off valve (2-14). The shut-off valves (2-1), (2-3), (2-6), (2-9), and (2-11) are in the open state during fuel delivery; A remote control valve (2-15) is also provided between the shut-off valve (2-14) and the engine. The methanol pump (2-4) is turned on under control during operation, so that the fuel in the fuel tank enters the generator compartment through the methanol fuel pipeline; The engine is the prime mover of the generator set; The pipe connecting the remote control valve (2-15) to the methanol injection rail of the methanol generator set's engine is a double-walled pipe.

7. A marine containerized power supply system according to claim 6, characterized in that, A liquid collection tray (4-1) is provided at the bottom of the fuel preparation room. All working components on the methanol fuel pipeline are located above the liquid collection tray (4-1). Methanol fuel leaked during the operation of the working components falls into the liquid collection tray (4-1). A level gauge (4-2) is installed in the collection tray (4-1). When the level gauge (4-2) detects that the liquid level in the collection tray (4-1) exceeds the set value, the remote control valve (4-3) is opened and the sewage pump (4-4) is started to collect the methanol in the collection tray into the alcohol sewage storage tank (5A). The alcohol wastewater storage tank (5A) is sealed with 1 kPag of nitrogen and equipped with a pressure sensor (5-2). When the pressure sensor (5-2) detects that the internal pressure of the alcohol wastewater storage tank (5A) is lower than the set value, the remote control valve (3-28) is opened to complete the air replenishment; When the level gauge (5-1) detects that the liquid level exceeds the set value, the shut-off valve (5-5) or the remote control valve (5-6) is opened to discharge the liquid.

8. The marine containerized power supply system of claim 1, wherein, The nitrogen cylinder group supplies nitrogen to the methanol daily use room (1A) and the methanol wastewater storage tank (5A) through the shut-off valve (3-22), nitrogen filter (3-23) and pressure reducing valve (3-24); When the oxygen content in the methanol daily use room (1A) is detected to be below the preset critical value, the remote control valve (3-26) is opened to input nitrogen from the nitrogen cylinder group room for replenishment; When the oxygen content in the alcohol wastewater storage tank (5A) is detected to be below the preset critical value, the remote control valve (3-28) is opened to input nitrogen from the nitrogen cylinder group for replenishment.

9. The marine containerized power supply system of claim 6, wherein, A cleaning pipe is also connected between two adjacent shut-off valves on the methanol fuel pipeline. The cleaning pipeline starts from the nitrogen cylinder group room, and after passing through the shut-off valve (3-1), nitrogen filter (3-2) and pressure reducing valve, it is divided into multiple branches. Each branch is equipped with a remote control valve and a check valve and is connected to the methanol fuel pipeline. After passing through the remote control valve, it is connected to the methanol daily use room (1A). When the working component needs to be cleaned, close the shut-off valves on both sides of the component, open the valves on the cleaning pipeline connected between the shut-off valves on both sides, and open the nitrogen cylinder to fill the cleaning pipeline with nitrogen, so as to blow the residual methanol in the working component back to the methanol daily use room (1A).

10. The marine containerized power supply system of claim 6, wherein, The methanol daily use room (1A) is equipped with a methanol filling port (1-1), an oxygen concentration sensor (1-2), a high-speed venting safety valve (1-3), a venting mast (1-4), a first alarm level gauge (1-5), a second alarm level gauge (1-6), a pressure sensor (1-7), and a temperature sensor (1-8). When the methanol level in the daily use room (1A) exceeds the preset first level, the second alarm level gauge (1-6) will issue an audible and visual alarm signal. When the methanol level in the daily use room (1A) exceeds the second level, the first alarm level gauge (1-5) will issue an audible and visual alarm signal and close the methanol filling port (1-1). When the oxygen concentration sensor (1-2) detects that the oxygen concentration in the methanol daily use room (1A) is greater than 5%, it will issue an audible and visual alarm signal and open the remote control valve (3-26) to replenish nitrogen. The high-speed venting safety valve (1-3) is used to balance the pressure in the methanol daily use room (1A), and its outlet is connected to the venting mast (1-4); When the temperature sensor (1-8) detects that the temperature in the methanol daily use tank (1A) is higher than the preset critical temperature, an alarm is given and the temperature is adjusted by discharging nitrogen.

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