LPG supply and containment system, method, medium, product and terminal of marine LPG dual-fuel main engine

Abstract

According to the LPG supply and containment system and method of the marine LPG dual-fuel main engine, the medium, the product and the terminal, by optimizing the system design, the manufacturing and mounting cost is reduced, the cost and the construction period of an LPG fuel supply system and an LPG fuel containment system are reduced, and meanwhile the space needed by the LPG fuel supply system on a ship is reduced; according to the invention, the requirements of an operator are considered, so that the operation is more intuitive and simpler, the operation complexity is reduced, the threshold requirement on the operator is reduced, and the maintenance cost is greatly reduced by improving the reliability and durability of the system.

Description

Technical Field

[0001] The present application relates to the technical field of ship liquefied petroleum gas supply, and in particular to an LPG supply and containment system, method, medium, product and terminal for a ship-based LPG dual-fuel main engine. Background Art

[0002] With the stringent requirements of the International Maritime Organization (IMO) on ship emissions, the shipping industry is facing the challenge of finding and adopting clean energy. At present, traditional ship fuels are not only problematic in terms of environmental impact, but also increasing in economic costs. In order to meet these challenges, the industry is exploring the use of liquefied petroleum gas (LPG) as an alternative fuel for ships.

[0003] As a clean energy, LPG has significant environmental advantages compared to conventional fuels. Using LPG as a power source can reduce fuel consumption by 10%, sulfur dioxide emissions by 99%, particulate matter emissions by 90%, carbon dioxide emissions by 15%, and nitrogen oxide emissions by 10%. These advantages make LPG an ideal choice for achieving IMO's 2030 emission reduction targets.

[0004] However, the existing LPG fuel power scheme has some technical and economic challenges. At present, LPG fuel power systems are usually equipped with cryogenic fuel tanks, and need to control the temperature and pressure of LPG through multi-stage booster and heat exchanger to meet the requirements of main engine combustion. This process not only increases the complexity of the system, but also leads to a significant increase in costs.

[0005] There are two main solutions in the industry for the enclosure of cryogenic LPG fuel tanks: one is to configure a reliquefaction system to maintain the pressure of the fuel tank, and the other is to use a cryogenic and high-pressure LPG fuel tank. The reliquefaction system of Option 1 is expensive, has high maintenance costs, and requires high skills from the operator. The cryogenic and high-pressure LPG fuel tank of Option 2 requires the use of special cryogenic steel plates, increases the design pressure, and covers the surface of the tank with an insulation layer, which also increases the complexity and cost of construction.

[0006] In addition, the pressurization and heat exchange process of the LPG gas supply system also leads to an increase in system costs, occupies a large space, is complex to operate, and requires more maintenance work, which increases the difficulty of system operation and management. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides an LPG supply and containment system, method, medium, product and terminal for a marine LPG dual-fuel main engine, which is used to solve the problems of high cost and high difficulty in maintenance and management of the LPG gas supply system in the prior art.

[0008] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present application provides an LPG supply and containment system for a marine LPG dual-fuel main engine, comprising: an LPG fuel storage tank, a low-pressure filter, an LPG fuel supply pump, a filter, an LPG fuel heat exchanger, a valve group unit, an LPG dual-fuel main engine and an LPG fuel reflux device; the LPG fuel storage tank, the low-pressure filter, the LPG fuel supply pump, the filter, and the LPG fuel heat exchanger are connected in sequence and then connected to the LPG dual-fuel main engine through the valve group unit; one end of the LPG fuel reflux device is connected to the inlet end of the low-pressure filter, The other end of the LPG fuel reflux device is connected to the valve group unit; wherein, the LPG fuel output from the LPG fuel storage tank is roughly filtered by the low-pressure filter, and then enters the LPG fuel supply pump for pressurization, the pressurized LPG fuel is finely filtered by the filter, the finely filtered LPG fuel enters the LPG fuel heat exchanger for heating or cooling to a preset temperature, and then is output to the LPG dual-fuel main engine through the supply valve group subunit of the valve group unit; the LPG fuel refluxed from the LPG dual-fuel main engine is recovered to the LPG fuel reflux device through the reflux valve group subunit of the valve group unit.

[0009] In some embodiments of the first aspect of the present application, a fuel tank outlet control valve and a fuel tank outlet check valve are sequentially connected between the LPG fuel storage tank and the low-pressure filter.

[0010] In some embodiments of the first aspect of the present application, a fuel pump outlet accumulator is connected between the LPG fuel supply pump and the filter.

[0011] In some embodiments of the first aspect of the present application, the LPG fuel reflux device includes a fuel reflux collection tank; a liquid level control valve is connected between the fuel reflux collection tank and the inlet end of the low-pressure filter; and a fuel reflux control valve is connected between the fuel reflux collection tank and the valve group unit.

[0012] In some embodiments of the first aspect of the present application, the fuel reflux collection tank is respectively connected to an exhaust pipeline and a nitrogen supply pipeline; the exhaust pipeline is provided with an exhaust pressure reducing valve; the nitrogen supply pipeline is provided with a nitrogen pressure boosting valve; wherein, the fuel reflux collection tank is also provided with a capture tank pressure sensor; the capture tank pressure sensor is connected to a pressure controller; the pressure controller is respectively connected to the exhaust pressure reducing valve and the nitrogen pressure boosting valve; wherein, the pressure controller controls and adjusts the opening of the exhaust pressure reducing valve or the opening of the nitrogen pressure boosting valve according to the pressure value detected by the capture tank pressure sensor, so as to maintain the pressure value of the fuel reflux collection tank within a preset pressure range.

[0013] In some embodiments of the first aspect of the present application, the LPG fuel reflux device also includes a collecting tank level gauge and a level controller; the collecting tank level gauge is arranged on the fuel reflux collecting tank; the level controller is respectively connected to the collecting tank level gauge and the level control valve; wherein the level controller controls and adjusts the opening of the level control valve according to the level information collected by the collecting tank level gauge, so that the LPG fuel in the fuel reflux collecting tank is transported to the inlet end of the low-pressure filter.

[0014] To achieve the above-mentioned purpose and other related purposes, the second aspect of the present application provides an LPG supply and containment method for a marine LPG dual-fuel main engine, which is applied to the LPG supply and containment system of the marine LPG dual-fuel main engine. The method comprises: the LPG fuel outputted from the LPG fuel storage tank is coarsely filtered by the low-pressure filter, and then enters the LPG fuel supply pump for pressurization; the pressurized LPG fuel is finely filtered by the filter; the finely filtered LPG fuel enters the LPG fuel heat exchanger for heating or cooling to a preset temperature, and then is outputted to the LPG dual-fuel main engine through the supply valve group subunit of the valve group unit; the LPG fuel refluxed from the LPG dual-fuel main engine is recovered to the LPG fuel reflux device through the reflux valve group subunit of the valve group unit.

[0015] To achieve the above-mentioned purpose and other related purposes, the third aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the LPG supply and containment method of the marine LPG dual-fuel main engine.

[0016] To achieve the above-mentioned purpose and other related purposes, the fourth aspect of the present application provides a computer program product, which includes a computer program code. When the computer program code runs on a computer, the computer implements the LPG supply and containment method of the marine LPG dual-fuel main engine.

[0017] To achieve the above-mentioned purpose and other related purposes, the fifth aspect of the present application provides an electronic terminal, including a memory, a processor and a computer program stored in the memory; the processor executes the computer program to implement the LPG supply and containment method of the marine LPG dual-fuel main engine.

[0018] As described above, the LPG supply and containment system, method, medium, product and terminal of the marine LPG dual-fuel main engine provided by the present application have the following beneficial effects:

[0019] The present invention reduces manufacturing and installation costs, reduces the cost and construction period of the LPG fuel supply system and the LPG fuel containment system by optimizing the system design, and reduces the space required for the LPG fuel supply system on board; the present invention takes into account the needs of operators, makes the operation more intuitive and simple, reduces the complexity of operation, and lowers the threshold requirements for operators, and greatly reduces maintenance costs by improving the reliability and durability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a structural schematic diagram of an LPG supply and containment system for a marine LPG dual-fuel main engine in one embodiment of the present application.

[0021] Figure 2 Shown is a schematic diagram of the structure of an electronic terminal in one embodiment of the present application. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0023] To facilitate understanding of the embodiments of the present application, first Figure 1 Detailed description. Figure 1 The schematic diagram of the structure of the LPG supply and containment system of a marine LPG dual-fuel main engine in an embodiment of the present invention is shown. The LPG supply and containment system of the marine LPG dual-fuel main engine in this embodiment mainly includes:

[0024] LPG fuel storage tank 100, low pressure filter 110, LPG fuel supply pump 120, filter 130, LPG fuel heat exchanger 140, valve group unit 150, LPG dual fuel main engine 160 and LPG fuel return device 170;

[0025] The LPG fuel storage tank 100, the low-pressure filter 110, the LPG fuel supply pump 120, the filter 130, and the LPG fuel heat exchanger 140 are connected in sequence and then connected to the LPG dual-fuel main engine 160 through the valve group unit 150; one end of the LPG fuel reflux device 170 is connected to the inlet end of the low-pressure filter 110, and the other end of the LPG fuel reflux device 170 is connected to the valve group unit 150.

[0026] Among them, the LPG fuel output by the LPG fuel storage tank 100 is roughly filtered by the low-pressure filter 110, and then enters the LPG fuel supply pump 120 for pressurization. The pressurized LPG fuel is finely filtered by the filter 130. The finely filtered LPG fuel enters the LPG fuel heat exchanger 140 to be heated or cooled to a preset temperature, and then output to the LPG dual-fuel main engine 160 through the supply valve group subunit 151 of the valve group unit 150; the LPG fuel refluxed by the LPG dual-fuel main engine 160 is recovered to the LPG fuel reflux device 170 through the reflux valve group subunit 152 of the valve group unit 150.

[0027] It should be noted that the embodiment of the present invention provides power for the ship by supplying the LPG fuel in the LPG fuel storage tank 100 to the LPG dual-fuel main engine 160 of the ship. The LPG fuel storage tank 100 is used to store LPG fuel at full pressure and room temperature. As a clean energy, LPG is increasingly used in ship fuel systems. At least one or more LPG fuel storage tanks 100 are configured on the ship, and the embodiment of the present invention does not limit this.

[0028] The LPG dual-fuel host 160 has high requirements for the cleanliness of the LPG fuel to ensure the performance of the host and extend its service life. Therefore, the LPG fuel needs to be processed before it is supplied to the LPG dual-fuel host 160. The LPG fuel output from the LPG fuel storage tank 100 is roughly filtered by the low-pressure filter 110. The low-pressure filter 110 is a device for fluid filtration that can work at a lower pressure and is generally used to remove solid particles and impurities in liquids or gases. The selection and use of the low-pressure filter 110 should be determined according to the specific application requirements and working conditions to ensure the filtering effect and the long-term stable operation of the equipment.

[0029] After being roughly filtered by the low-pressure filter 110, the LPG fuel enters the LPG fuel supply pump 120 for pressurization to reach the preset pressure requirement, which can ensure that the LPG fuel can be supplied to the LPG dual-fuel host 160 at an appropriate pressure. The LPG fuel that reaches the preset pressure requirement needs to be further filtered to remove the remaining tiny particles and impurities to ensure that the LPG fuel supplied to the host reaches the required cleanliness, that is, it is finely filtered by the filter 130 to meet the cleanliness requirements of the LPG dual-fuel host 160.

[0030] The present invention only has one LPG fuel supply pump 120, which simplifies the system design, makes the entire system structure simpler, reduces the manufacturing and installation costs, reduces the cost and construction period of the LPG fuel supply system and the LPG fuel containment system, and reduces the space required for the LPG fuel supply system on board. The selection and use of the filter 130 in the embodiment of the present invention should be determined according to the specific application requirements and working conditions to ensure the filtering effect and the long-term stable operation of the equipment.

[0031] Furthermore, the LPG fuel after fine filtration enters the LPG fuel heat exchanger 140, which is an LPG fuel heater / cooler, that is, the LPG fuel heat exchanger 140 can be used to heat or cool the LPG fuel to adjust the temperature of the LPG fuel to meet the requirements of the LPG dual-fuel host 160. After the cleanliness, pressure, and temperature of the LPG fuel meet the requirements of the LPG dual-fuel host 160 through a series of treatments, it is delivered to the LPG dual-fuel host 160 through the valve group unit 150.

[0032] The valve assembly unit 150 includes a supply valve assembly subunit 151 and a return valve assembly subunit 152. The LPG dual-fuel host 160 receives the LPG fuel delivered from the LPG fuel storage tank 100 through the supply valve assembly subunit 151. The LPG fuel supplied to the LPG dual-fuel host 160 may not be completely used, so a return flow is formed. The returned LPG fuel is recovered to the LPG fuel return device 170 through the return valve assembly subunit 152.

[0033] The present invention can reduce energy waste and lower the impact on the environment through the fuel return management of the LPG fuel return device 170, and also help maintain the performance of the host and extend its service life.

[0034] In one embodiment, a fuel tank outlet control valve 101 and a fuel tank outlet check valve 102 are sequentially connected between the LPG fuel storage tank 100 and the low-pressure filter 110 .

[0035] It should be noted that when the LPG fuel storage tank 100 supplies gas to the LPG dual-fuel main engine 160, the gas supply channel is opened by opening the fuel tank outlet control valve 101 to deliver LPG fuel to the LPG dual-fuel main engine 160. The fuel tank outlet check valve 102 is used to prevent the backflow of LPG fuel from entering the LPG fuel storage tank 100. The backflow of LPG fuel may contain contaminants, so as to prevent the backflow of LPG fuel from entering the LPG fuel storage tank 100 and contaminating the LPG fuel stored therein.

[0036] In one embodiment, a fuel pump outlet accumulator 180 is connected between the LPG fuel supply pump 120 and the filter 130 .

[0037] The fuel pump outlet accumulator 180 is located at the outlet of the LPG fuel supply pump 120 and is mainly used to stabilize the pressure to prevent the subsequent processing from being adversely affected by the pump outlet pressure fluctuation. When the pressure of the LPG fuel supply pump 120 changes, the fuel pump outlet accumulator 180 can absorb these changes, reduce pressure fluctuations, and thus provide a more stable fuel supply.

[0038] In one embodiment, the LPG fuel reflux device 170 includes a fuel reflux collection tank 171; a liquid level control valve 172 is connected between the fuel reflux collection tank 171 and the inlet end of the low-pressure filter 110; and a fuel reflux control valve 173 is connected between the fuel reflux collection tank 171 and the valve group unit 150.

[0039] When there is refluxed LPG fuel in the LPG dual-fuel main engine 160, the valve group unit 150 delivers the refluxed LPG fuel to the fuel reflux collection tank 171. At this time, the fuel reflux control valve 173 needs to be opened to open the reflux channel. The LPG fuel refluxed to the fuel reflux collection tank 171 can enter the low-pressure filter 110 after opening the liquid level control valve 172, and then continue to undergo a series of processes to enter the LPG dual-fuel main engine 160, so that the refluxed LPG fuel can be recycled.

[0040] In one embodiment, the fuel reflux collection tank 171 is respectively connected to an exhaust pipeline and a nitrogen supply pipeline; an exhaust pressure reducing valve 174 is provided on the exhaust pipeline; and a nitrogen pressure boosting valve 175 is provided on the nitrogen supply pipeline.

[0041] In one embodiment, the fuel reflux collection tank 171 is further provided with a capture tank pressure sensor 176; the capture tank pressure sensor 176 is connected to a pressure controller 177; the pressure controller 177 is respectively connected to the exhaust pressure reducing valve 174 and the nitrogen pressure boosting valve 175;

[0042] The pressure controller 177 controls and adjusts the opening of the exhaust pressure reducing valve 174 or the opening of the nitrogen pressure boosting valve 175 according to the pressure value detected by the capture tank pressure sensor 176, so as to maintain the pressure value of the fuel reflux collection tank 171 within a preset pressure range.

[0043] It should be noted that the capture tank pressure sensor 176 monitors the pressure value of the fuel reflux collection tank 171 in real time, and the pressure controller 177 determines whether the pressure value is within the preset pressure range. If the pressure value is higher than the preset pressure range, the pressure controller 177 controls the opening of the exhaust pressure reducing valve 174 to connect the exhaust pipeline and discharge the excess LPG fuel or nitrogen. The opening of the exhaust pressure reducing valve 174 is different according to the exhaust volume, and the pressure controller 177 controls the opening of the exhaust pressure reducing valve 174 in real time; if the pressure value is lower than the preset pressure range, the pressure controller 177 controls the opening of the nitrogen pressure boosting valve 175 to connect the nitrogen supply pipeline, and the exhaust pressure boosting valve 174 is closed. The pressure controller 177 adjusts the opening of the nitrogen pressure boosting valve 175 according to the difference between the pressure value and the preset pressure range, and controls the nitrogen supply, so that the pressure value 171 of the fuel reflux collection tank 171 is always maintained within the preset pressure range.

[0044] In one embodiment, the LPG fuel reflux device 170 further includes a collecting tank level gauge 178 and a level controller 179; the collecting tank level gauge 178 is disposed on the fuel reflux collecting tank 171; the level controller 179 is connected to the collecting tank level gauge 178 and the level control valve 172, respectively;

[0045] The liquid level controller 179 controls and adjusts the opening of the liquid level control valve 172 according to the liquid level information collected by the collection tank liquid level gauge 178 , so that the LPG fuel in the fuel reflux collection tank 171 is transported to the inlet end of the low-pressure filter 110 .

[0046] It should be noted that the LPG fuel in the fuel reflux collection tank 171 can be continuously supplied to the LPG dual-fuel host 160 after being processed, so as to realize the recycling of the LPG fuel. The liquid level information of the LPG fuel in the fuel reflux collection tank 171 is collected by the collection tank liquid level gauge 178. If the liquid level controller 179 determines that the liquid level in the collected liquid level information is too high, the liquid level controller 179 controls the liquid level control valve 172 to open, and the opening degree of the liquid level control valve 172 is also adjusted in real time according to the liquid level in the liquid level information, and the LPG fuel is delivered to the inlet end of the low-pressure filter 110. The LPG fuel is processed by the coarse filtration of the low-pressure filter 110, the pressure increase of the LPG fuel supply pump 120, the fine filtration of the filter 130, the temperature adjustment of the LPG fuel heat exchanger 140, etc., and then is continuously supplied to the LPG dual-fuel host 160 for use through the supply valve group subunit 151 of the valve group unit 150.

[0047] It should be emphasized that the LPG supply and containment system for the marine LPG dual-fuel main engine provided by the present invention reduces the manufacturing and installation costs, reduces the cost and construction period of the LPG fuel supply system and the LPG fuel containment system, and reduces the space required for the LPG fuel supply system on board by optimizing the system design; the present invention takes into account the needs of the operator, making the operation more intuitive and simple, reducing the complexity of the operation, and lowering the threshold requirements for the operator, and greatly reduces the maintenance cost by improving the reliability and durability of the system.

[0048] In the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with substantially the same functions and effects, and do not limit their order. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit them to be different.

[0049] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" represent examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0050] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, ab, ac, bc or abc, where a, b, c can be single or multiple.

[0051] The present application also provides an LPG supply and containment method for a marine LPG dual-fuel main engine, which is applied to the LPG supply and containment system for the marine LPG dual-fuel main engine as described above, and the method comprises:

[0052] The LPG fuel output from the LPG fuel storage tank is roughly filtered by the low-pressure filter, and then enters the LPG fuel supply pump for pressurization. The pressurized LPG fuel is finely filtered by the filter. The finely filtered LPG fuel enters the LPG fuel heat exchanger to be heated or cooled to a preset temperature, and then is output to the LPG dual-fuel main engine through the supply valve group subunit of the valve group unit; the LPG fuel refluxed from the LPG dual-fuel main engine is recovered to the LPG fuel reflux device through the reflux valve group subunit of the valve group unit.

[0053] It should be understood that the specific processes of the above corresponding steps have been described in detail in the above embodiments, and for the sake of brevity, they will not be repeated here.

[0054] It should also be understood that the division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0055] Figure 2 is a schematic block diagram of an electronic terminal provided in an embodiment of the present application. Figure 2 As shown, the electronic terminal includes: at least one processor 201, a memory 202, at least one network interface 203 and a user interface 205. The various components in the device are coupled together through a bus system 204. It can be understood that the bus system 204 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 204 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Figure 2 In the specification, various buses are labeled as bus systems.

[0056] The user interface 205 may include a display, a keyboard, a mouse, a trackball, a click gun, keys, buttons, a touch pad or a touch screen.

[0057] It is understood that the memory 202 can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM). The memory described in the embodiments of the present invention is intended to include but is not limited to these and any other suitable categories of memory.

[0058] The memory 202 in the embodiment of the present invention is used to store various categories of data to support the operation of the electronic terminal 200. Examples of these data include: any executable program used to operate on the electronic terminal 200, such as an operating system 2021 and an application 2022; the operating system 2021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application 2022 may include various applications, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services. The LPG supply and containment method for implementing the marine LPG dual-fuel main engine provided in the embodiment of the present invention may be included in the application 222.

[0059] The method disclosed in the above embodiment of the present invention can be applied to the processor 201, or implemented by the processor 201. The processor 201 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 201 or the instruction in the form of software. The above processor 201 may be a general processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor 201 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiment of the present invention. The general processor 201 can be a microprocessor or any conventional processor, etc. In combination with the steps of the accessory optimization method provided in the embodiment of the present invention, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0060] In an exemplary embodiment, the electronic terminal 200 may be implemented by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD) to execute the aforementioned method.

[0061] According to the method provided in the embodiments of the present application, the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes the LPG supply and containment method of the marine LPG dual-fuel main engine of any of the illustrated embodiments.

[0062] According to the method provided in the embodiments of the present application, the present application also provides a computer-readable storage medium, which stores a program code. When the program code runs on a computer, the computer executes the LPG supply and containment method for a marine LPG dual-fuel main engine of any embodiment of the illustrated embodiments.

[0063] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and / or a computer. By way of illustration, both applications running on a computing device and a computing device can be components. One or more components may reside in a process and / or an execution thread, and a component may be located on a computer and / or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may, for example, communicate through local and / or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and / or a network, such as the Internet interacting with other systems through signals).

[0064] Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0065] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0066] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0067] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0068] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0069] In the above embodiments, the functions of each functional unit can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When loading and executing computer program instructions (programs) on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations. Available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., high-density digital video discs (DVDs), or semiconductor media (e.g., solid state disks (SSDs), etc.).

[0070] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0071] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0072] In summary, the present application provides an LPG supply and containment system, method, medium, product and terminal for a marine LPG dual-fuel main engine. The system includes: an LPG fuel storage tank, a low-pressure filter, an LPG fuel supply pump, a filter, an LPG fuel heat exchanger, a valve group unit, an LPG dual-fuel main engine and an LPG fuel reflux device; the LPG fuel output from the LPG fuel storage tank is coarsely filtered by the low-pressure filter, and then enters the LPG fuel supply pump for pressurization, the pressurized LPG fuel is finely filtered by the filter, and the finely filtered LPG fuel enters the LPG fuel heat exchanger for heating or cooling to a preset temperature, and then is output to the LPG dual-fuel main engine through the supply valve group subunit of the valve group unit; the LPG fuel refluxed from the LPG dual-fuel main engine is recovered to the LPG fuel reflux device through the reflux valve group subunit of the valve group unit. The present invention reduces manufacturing and installation costs, reduces the cost and construction period of the LPG fuel supply system and the LPG fuel containment system by optimizing the system design, and reduces the space required for the LPG fuel supply system on board; the present invention takes into account the needs of operators, makes the operation more intuitive and simple, reduces the complexity of operation, and reduces the threshold requirements for operators, and greatly reduces maintenance costs by improving the reliability and durability of the system. Therefore, the present application effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0073] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. An LPG supply and containment system for a marine LPG dual-fuel main engine, characterized in that: include: LPG fuel storage tank, low-pressure filter, LPG fuel supply pump, filter, LPG fuel heat exchanger, valve unit, LPG dual-fuel main engine and LPG fuel return device; The LPG fuel storage tank, the low-pressure filter, the LPG fuel supply pump, the filter, and the LPG fuel heat exchanger are connected in sequence and then connected to the LPG dual-fuel host through the valve group unit; one end of the LPG fuel reflux device is connected to the inlet end of the low-pressure filter, and the other end of the LPG fuel reflux device is connected to the valve group unit; Among them, the LPG fuel output from the LPG fuel storage tank is roughly filtered by the low-pressure filter, and then enters the LPG fuel supply pump for pressurization. The pressurized LPG fuel is finely filtered by the filter. The finely filtered LPG fuel enters the LPG fuel heat exchanger to be heated or cooled to a preset temperature, and then is output to the LPG dual-fuel main engine through the supply valve group subunit of the valve group unit; the LPG fuel refluxed by the LPG dual-fuel main engine is recovered to the LPG fuel reflux device through the reflux valve group subunit of the valve group unit.

2. The LPG supply and containment system for a marine LPG dual-fuel main engine according to claim 1, characterized in that: A fuel tank outlet control valve and a fuel tank outlet check valve are sequentially connected between the LPG fuel storage tank and the low-pressure filter.

3. The LPG supply and containment system for a marine LPG dual-fuel main engine according to claim 1, characterized in that: A fuel pump outlet accumulator is connected between the LPG fuel supply pump and the filter.

4. The LPG supply and containment system for a marine LPG dual-fuel main engine according to claim 1, characterized in that: The LPG fuel reflux device comprises a fuel reflux collection tank; a liquid level control valve is connected between the fuel reflux collection tank and the inlet end of the low-pressure filter; and a fuel reflux control valve is connected between the fuel reflux collection tank and the valve group unit.

5. The LPG supply and containment system for a marine LPG dual-fuel main engine according to claim 4, characterized in that: The fuel reflux collection tank is respectively connected to an exhaust pipeline and a nitrogen supply pipeline; an exhaust pressure reducing valve is provided on the exhaust pipeline; The nitrogen supply pipeline is provided with a nitrogen pressure boosting valve; Wherein, the fuel reflux collection tank is also provided with a capture tank pressure sensor; the capture tank pressure sensor is connected to a pressure controller; the pressure controller is respectively connected to the exhaust pressure reducing valve and the nitrogen pressure boosting valve; The pressure controller controls and adjusts the opening of the exhaust pressure reducing valve or the opening of the nitrogen pressure boosting valve according to the pressure value detected by the capture tank pressure sensor, so that the pressure value of the fuel reflux collection tank is maintained within a preset pressure range.

6. The LPG supply and containment system for a marine LPG dual-fuel main engine according to claim 4, characterized in that: The LPG fuel reflux device further comprises a collecting tank level gauge and a level controller; the collecting tank level gauge is arranged on the fuel reflux collecting tank; the level controller is respectively connected to the collecting tank level gauge and the level control valve; The liquid level controller controls and adjusts the opening of the liquid level control valve according to the liquid level information collected by the collecting tank liquid level gauge, so that the LPG fuel in the fuel reflux collecting tank is delivered to the inlet end of the low-pressure filter.

7. A method for supplying and protecting LPG for a marine LPG dual-fuel main engine, characterized in that: The LPG supply and containment system applied to the marine LPG dual-fuel main engine as claimed in claims 1 to 7, the method comprising: The LPG fuel output from the LPG fuel storage tank is roughly filtered by the low-pressure filter, and then enters the LPG fuel supply pump for pressurization. The pressurized LPG fuel is finely filtered by the filter. The finely filtered LPG fuel enters the LPG fuel heat exchanger to be heated or cooled to a preset temperature, and then is output to the LPG dual-fuel main engine through the supply valve group subunit of the valve group unit; the LPG fuel refluxed from the LPG dual-fuel main engine is recovered to the LPG fuel reflux device through the reflux valve group subunit of the valve group unit.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the LPG supply and containment method of the marine LPG dual-fuel main engine of claim 7 is implemented.

9. A computer program product, characterized in that The computer program product includes computer program codes, and when the computer program codes are executed on a computer, the computer is enabled to implement the LPG supply and containment method for a marine LPG dual-fuel main engine as claimed in claim 7.

10. An electronic terminal comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the LPG supply and containment method for a marine LPG dual-fuel main engine as described in claim 7.

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