Ship pipeline series washing method and related products

Abstract

The invention provides a series washing method for a ship pipeline system, which is characterized in that particles have a good suspension characteristic in a high-speed fluid at a critical flow velocity not lower than that of solid particles in an oil flow medium, so that the solid particles can be smoothly taken out of a pipeline by the oil flow medium without being deposited. Therefore, solid particles in equipment and pipelines are prevented from depositing and blocking, and a favorable basis is provided for application of an efficient cleaning technology of the oil flow pipelines.

Description

Technical Field

[0001] The present application relates to the technical field of ship design, and in particular to a method for serial washing of ship pipelines and related products. Background Art

[0002] In the shipbuilding industry, the piping system is known as the "blood vessels" of the ship and plays a vital role. They not only connect various mechanical equipment inside the ship, but are also responsible for the flow and heat exchange of media such as water, oil, steam, and gas to ensure the normal operation of various systems on the ship. The smooth flow and effective exchange of these media in the pipelines are the basis for maintaining the efficient operation of the ship's power, cooling, water supply, ventilation and safety systems.

[0003] However, before the pipeline system is put into actual operation, a crucial link is to perform system cleaning to ensure that its cleanliness meets relevant standards and requirements. Especially for fresh water cooling systems and oil flow systems, since these systems have extremely high requirements for the purity of the medium and the cleanliness of the system, cleaning is particularly important.

[0004] Due to the high viscosity and poor fluidity of the oil flow medium and the extremely high cleanliness requirements, the oil flow system's serial cleaning work is relatively complicated and time-consuming. Once there are tiny particles or impurities in the pipeline, it may cause serious wear and damage to the equipment. Therefore, the serial cleaning cycle of the oil flow system is often long, and a more efficient and thorough cleaning method is required.

[0005] In the current context of fierce market competition, major shipyards are constantly shortening the shipbuilding cycle to meet market demand. However, efficient serial washing of the pipeline system has become a constraint. Traditional serial washing methods often have problems such as low efficiency and incomplete cleaning, and cannot meet the high requirements of the modern shipbuilding industry for cleanliness and construction cycle. Summary of the invention

[0006] The purpose of this application is to provide a method for serial washing of a ship piping system and related products to solve the problem of low serial washing efficiency of each branch of the current ship piping system.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions:

[0008] A method for serial washing of a ship piping system, comprising: obtaining the pollution level of pollutants in each branch of the ship piping system, and if the pollution level is greater than a set value, judging that each branch of the ship piping system needs serial washing; if it is judged that each branch of the ship piping system needs serial washing, obtaining the critical flow velocity of the oil flowing in each branch of the ship piping system and the actual flow velocity of the oil flowing and comparing them, wherein the critical flow velocity of each branch is calculated by the following formula:

[0009]

[0010] Among them, v c represents the critical velocity; α is the adjustment coefficient; c represents the volume fraction of solid particles; n represents the particle Reynolds number R ep Related index; υ0 represents the fluid kinematic viscosity; d p represents the diameter of impurity particles; g represents the acceleration of gravity; ρ S represents the solid density; ρ L Indicates the density of the transported fluid; D indicates the inner diameter of the pipe;

[0011] The subsequent steps are performed according to the comparison result of the initial oil flow velocity and the critical flow velocity. If the comparison result is that the initial oil flow velocity is greater than the critical flow velocity, each branch of the ship pipeline system is washed in series.

[0012] In some embodiments, the initial oil flow rate is obtained through a simulation process, which includes: determining information about valves installed in the ship pipeline, determining the opening of the valve according to the valve information, and obtaining the simulated initial oil flow rate in each branch of the ship pipeline system according to a flow resistance curve of the valve opening and the flow oil; or, determining information about pumps installed in the ship pipeline, determining the pressure of the pump according to the pump information, obtaining the simulated flow rate of the oil in each branch of the ship pipeline system according to a flow performance curve of the pump pressure and the flow oil, and calculating the simulated initial oil flow rate according to the simulated flow rate.

[0013] In some embodiments, if the simulated initial oil flow velocity in each branch of the ship pipeline system is less than the critical velocity, the flow oil in each branch of the ship pipeline system is heated, the filter installed on each branch of the ship pipeline system is adjusted, the number of pumps installed in the ship pipeline system is increased, or the diameter of each branch of the ship pipeline system is adjusted.

[0014] In some embodiments, if the simulated initial oil flow velocity in each branch of the ship's pipeline system is greater than the critical speed, the opening of the valves and the pump speed installed on each branch of the ship's pipeline system are set according to the simulation process so that the initial oil flow velocity in each branch of the ship's pipeline system is greater than the critical speed.

[0015] In some embodiments, it also includes: obtaining the temperature of the flowing oil in each branch of the ship's piping system, and solving the fluid kinematic viscosity of the corresponding branch, the temperature of the flowing oil is calculated by measuring the pipe wall temperature, pipe wall thermal conductivity, convection parameters and pipe wall thickness of each branch of the ship's piping system.

[0016] In some embodiments, when 1 <R ep<50, n is 4; when 50 <R ep When <100, n is 3.

[0017] In some embodiments, the set value is level 8 in the NAS standard.

[0018] The second aspect of the present application provides a ship piping system series washing device, comprising a pollution level judgment module, an oil flow speed comparison module and an execution module, wherein the pollution level judgment module is used to obtain the pollution level of pollutants in each branch of the ship piping system, and if the pollution level is greater than a set value, the branches of the ship piping system are series washed;

[0019] The oil flow velocity comparison module is used to obtain and compare the critical flow velocity and initial flow velocity of the oil in each branch of the ship's pipeline system when it is determined that each branch of the ship's pipeline system needs to be washed in series. The critical flow velocity of each branch is calculated by the following formula:

[0020]

[0021] Among them, v c represents the critical velocity; α is the adjustment coefficient; c represents the volume fraction of solid particles; n represents the particle Reynolds number R ep Related index; υ0 represents the fluid kinematic viscosity; d p represents the diameter of impurity particles; g represents the acceleration of gravity; ρ S represents the solid density; ρ L Indicates the density of the transported fluid; D indicates the inner diameter of the pipe;

[0022] The execution module is used to execute subsequent steps according to the comparison result of the initial oil flow velocity and the critical flow velocity. If the comparison result is that the initial oil flow velocity is greater than the critical flow velocity, each branch of the ship pipeline system is washed in series.

[0023] A third aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program. When the computer program runs on a processor, the processor executes the method described in the first aspect.

[0024] The fourth aspect of the present application provides an electronic device, comprising: at least one memory for storing programs; and at least one processor for executing the programs stored in the memory. When the programs stored in the memory are executed, the processor is used to execute the method described in the first aspect.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The present application provides a method for serial washing of a ship's pipeline system, which proposes a critical flow rate of not less than that of solid particles in an oil flow medium, so that the particles have good suspension characteristics in a high-speed fluid, thereby ensuring that the solid particles can be smoothly carried out of the pipeline by the oil flow medium without being deposited. This avoids the blockage of solid particle deposition in equipment and pipelines, and provides a favorable basis for the application of efficient cleaning technology for oil flow pipelines. In addition, the present application not only provides a critical flow rate evaluation index that can simultaneously characterize the interaction between solids and transport fluids, but also provides the law of change of the evaluation index affected by various parameters. In actual use, parameters can be appropriately selected according to needs to ensure the efficiency of data solution and debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic flow chart of a method for serial washing of a ship piping system according to an embodiment of the present application is shown;

[0029] Figure 2 A schematic flow chart of a method for serial washing of a ship piping system according to another embodiment is shown;

[0030] Figure 3 A schematic diagram showing the structure of a serial washing device for a ship piping system according to an embodiment of the present application is shown;

[0031] Figure 4 A schematic diagram of a serial washing device for a ship piping system including a piping structure of the present application is shown. DETAILED DESCRIPTION

[0032] The technical solutions of the specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings. These implementation methods are only used to illustrate the present application, but not to limit the present application.

[0033] The term "and / or" in this application is a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In the present invention, the symbol " / " indicates that the associated objects are in an "or" relationship, for example, "A / B" means "A or B".

[0034] The terms "first" and "second" in the specification and claims of this application are used to distinguish different objects rather than to describe a specific order of the objects. For example, "first response message" and "second response message" are used to distinguish different response messages rather than to describe a specific order of the response messages.

[0035] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be considered 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.

[0036] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more than two. For example, multiple processing units refer to two or more processing units, etc., and multiple elements refer to two or more elements, etc.

[0037] In the prior art, the Reynolds number is generally used to indicate the state of oil flow in the ship's pipeline system. If the Reynolds number is greater than 4000, it is judged that the oil flow in the ship's pipeline system is in a turbulent state. However, the prior art only describes the state of the fluid that plays a role in transportation, while pipeline washing is a process of continuous interaction between fluid and solid particles. The ship's pipeline system may have the problem of particle deposition and blockage in the pipe body. Only the Reynolds number, a single indicator, is used to characterize the interaction between fluid and pollutant particles, such as the entrainment and transportation process of the fluid on the particles. The Reynolds number, which is a single evaluation of the fluid flow state, cannot determine whether the pipeline system is in a truly efficient washing state. Based on the current existing technology, the cleaning process of the ship's pipeline system is still long, and the debugging cycle of the shipbuilding unit is difficult to meet the shipowner's delivery time limit requirements, and there is a risk of facing high compensation.

[0038] Based on the problems existing in the prior art, the present application provides a method for serial washing of a ship piping system and related products. The technical solution of the present application is described in detail below in conjunction with the accompanying drawings.

[0039] Figure 1 , Figure 2 The flowchart of the method for serial washing of a ship piping system according to one embodiment of the present application is shown. Figure 1 As shown, the method for serial washing of a ship piping system in an embodiment of the present application includes:

[0040] The pollution level of pollutants in each branch of the ship's piping system is obtained. If the pollution level is greater than the set value, each branch of the ship's piping system is washed in series. Specifically, the pollution level of each branch of the ship's piping system is measured in real time, and the measurement parameters include the size and quantity ratio of pollutant particles. In one embodiment, the pollution level can be judged according to the number ratio of pollutant particle size, and the pollution level is characterized by the NAS standard. The real-time NAS (National Aerospace Standard 1638) standard level data of each branch of the ship's piping system is obtained by online measurement equipment. For example, a monitor that can measure the size and quantity ratio of particles in real time can be selected, or a sensor that monitors multiple parameters at the same time, such as particle concentration, particle size distribution, etc., can be selected, and these data can be converted into NAS levels through algorithms or software.

[0041] Furthermore, the aforementioned set value can be level 8. For example, if the pollution level of each branch of the ship pipeline, that is, the level of each branch in the NAS standard is less than level 8, it indicates that the oil flow quality of each branch of the ship pipeline meets the requirements, and the oil flow system series washing is completed or the oil flow system does not need series washing. If there is a branch in the ship pipeline system whose pollutant level is greater than level 8 in the NAS standard, proceed to the next step. It can be understood that the set values ​​of the aforementioned ship pipeline branches are only exemplary and not restrictive. When designing the set values, those skilled in the art can specifically design them according to the different uses of the oil flow medium.

[0042] Obtain the temperature, viscosity and critical flow rate of the oil flowing in each branch of the ship's pipeline system. The process of obtaining the oil flow temperature in each branch of the ship's pipeline may include: selecting the corresponding series washing branch according to the purpose of series washing. In one embodiment, the series washing branch may include 3 or more branches, and each branch is provided with a corresponding solenoid valve. Use non-destructive external sensors such as infrared to measure the wall temperature of each series washing branch, and calculate the oil flow temperature in the pipe by combining parameters such as the thermal conductivity, convection and wall thickness of the pipe wall. For different types of oil flow that may flow through the ship's pipeline, based on the oil flow viscosity-temperature curve, the real-time viscosity of the oil flow in the corresponding branch can be calculated based on the aforementioned oil flow temperature in the pipe.

[0043] Frequency converters, solenoid valves, filters, pressure sensors, online particle measurement equipment, and ultrasonic flowmeters are also installed between and on each branch of the ship's pipeline system. Among them, the frequency converter can control the flow velocity and flow rate of the oil in the pipeline by adjusting the speed of the pump. The changes in the flow velocity and flow rate will directly affect the heat exchange efficiency between the oil and the pipe wall, thereby affecting the temperature of the oil. The solenoid valve is used to control the on and off of each branch of the ship's pipeline to achieve directional flow of the oil. By controlling the opening and closing of the solenoid valve, it can be ensured that the oil flows in a predetermined path and sequence to avoid temperature fluctuations caused by mixing or backflow of the oil. The filter is used to remove impurities and particles in the oil flow to maintain the cleanliness of the oil flow. The pressure sensor is used to monitor the pressure changes of the oil flow in the pipeline in real time, the online particle measurement equipment is used to monitor the size and quantity of particles in the oil flow in real time, and the ultrasonic flowmeter is used to accurately measure the flow rate of the oil flow.

[0044] In another embodiment, the critical flow velocity v of each branch can be calculated based on the pollution level and oil viscosity of each branch of the ship pipeline obtained in the above steps. c . Critical flow velocity v of each branch c It can be solved by the following formula:

[0045]

[0046] Among them, v c represents the critical velocity, in m / s; α is the adjustment coefficient, which is taken as 3.64 in some embodiments of the present application, dimensionless; c represents the volume fraction of solid particles, dimensionless; n represents the particle Reynolds number R ep The related index is dimensionless. In some embodiments of the present application, when 1 <R ep <50, n is 4; when 50 <R ep When <100, n is 3; υ0 represents the fluid kinematic viscosity, unit is m 2 / s;d p Indicates the diameter of impurity particles, in m; g indicates the acceleration due to gravity, in m / s 2 ρ S Indicates solid density in kg / m 3 ρ L Indicates the density of the conveyed fluid, in kg / m 3 ; D represents the inner diameter of the pipe, in meters.

[0047] Since the critical velocity is affected by the size of pollutant particles in each branch and the diameter of each branch pipe, but the volume of pollutant particles in each branch pipe is usually small, the critical velocity is relatively less affected by the volume of pollutant particles and the pollution level. However, the diameters of each branch pipe may be quite different. In order to ensure that the pollutant particles in each pipe can be effectively carried and flowed without settling, it is necessary to solve the corresponding critical velocity according to the specific parameters of each pipe.

[0048] In one embodiment, the present application can obtain simulation data using one-dimensional pipe network simulation software such as commercial software such as Applied FlowTechnology, Flomaster, or self-written pipe network software. The aforementioned pipe network software contains the valve opening-flow resistance curve and the pump pressure-flow performance curve. In specific implementation, the corresponding valve or pump is selected in the pipe network software to obtain the corresponding valve opening-flow resistance curve or the pump pressure-flow performance curve. That is, according to the different types of valves installed in each branch, the corresponding valve opening-flow resistance curve is selected to obtain the simulated initial oil flow rate in the branch; or according to the different pumps installed in each branch, the corresponding pump pressure-flow performance curve can be selected to obtain the simulated flow rate of the oil flowing in the branch, and the simulated initial oil flow rate is obtained according to the simulated flow rate.

[0049] If each branch of the ship pipeline meets the requirement that the initial oil flow rate of the simulation is greater than the critical speed, it means that each branch can meet its critical speed requirement by adjusting the valve opening and pump speed. Then, the pump speed and valve opening and other parameters are confirmed first, and then the parameters of each pump and each valve are fine-tuned according to the on-site debugging results to achieve precise adjustment to meet the flow rate requirements of each branch. If there is a branch that does not meet the requirement that the initial oil flow rate of the simulation is greater than the critical speed, the series washing branch cannot meet the critical flow rate requirements of each branch. At this time, the branches of the ship pipeline are optimized by oil temperature heating, filter arrangement, adding external pump groups, adjusting pipe diameters, etc. After optimization, they are recalculated according to the latest settings to determine whether the flow rate of each branch is greater than the critical speed.

[0050] like Figure 3 As shown, the second aspect of the present application provides a ship piping system series washing device, which includes a pollution level judgment module, an oil flow rate comparison module and an execution module. Among them, the pollution level judgment module is used to obtain the pollution level of pollutants in each branch of the ship piping system in real time. If the pollution level is greater than the set value, the branches of the ship piping system are series washed. Specifically, the pollution degree of each branch of the ship piping system is measured in real time, and the measurement parameters include the size and quantity ratio of pollutant particles. In one embodiment, the pollution level can be judged according to the number ratio of pollutant particles. The pollution level is characterized by taking the NAS standard as an example, and the real-time NAS standard level data of each branch of the ship piping system is obtained by online measurement equipment.

[0051] In a specific embodiment, the aforementioned set value can be level 8. For example, if the pollution level of each branch of the ship pipeline, that is, the level in the NAS standard of each branch, is less than level 8, it indicates that the oil flow quality of each branch of the ship pipeline meets the requirements, and the oil flow system series washing is completed or the oil flow system does not need series washing. If there is a branch of the ship pipeline with a level greater than level 8 in the NAS standard, proceed to the next step. It can be understood that the set values ​​of the aforementioned ship pipeline branches are only exemplary and not restrictive. When designing the set values, those skilled in the art can specifically design them according to the different uses of the oil flow medium.

[0052] The acquisition module is used to obtain the critical velocity and initial velocity of oil flow in each branch of the ship's pipeline system in real time and compare them when it is determined that each branch of the ship's pipeline system needs to be washed in series. The critical velocity of each branch is calculated by the following formula:

[0053]

[0054] Among them, v c represents the critical velocity, in m / s; α is the adjustment coefficient, which is taken as 3.64 in some embodiments of the present application, dimensionless; c represents the volume fraction of solid particles, dimensionless; n represents the particle Reynolds number R ep The related exponent, dimensionless, is 1 <R ep <50, n is 4; in some embodiments of the present application, when 50 <R ep When <100, n is 3; υ0 represents the fluid kinematic viscosity, unit is m 2 / s;d p Indicates the diameter of impurity particles, in m; g indicates the acceleration due to gravity, in m / s 2 ρ S Indicates solid density in kg / m 3 ρ L Indicates the density of the conveyed fluid, in kg / m 3 ; D represents the inner diameter of the pipe, in meters.

[0055] The execution module is used to execute subsequent steps according to the comparison result between the initial oil flow rate and the critical flow rate. If the comparison result is that the initial oil flow rate is greater than the critical flow rate, each branch of the ship's pipeline system is washed in series. In one embodiment, the present application can use one-dimensional pipeline network simulation software such as Applied Flow Technology, Flomaster and other commercial software or self-written pipeline network software to obtain simulation data. The aforementioned pipeline network software contains the valve opening-flow resistance curve and the pump pressure-flow performance curve. Figure 4As shown, frequency converters, solenoid valves, filters, pressure sensors, online particle measurement equipment, ultrasonic flowmeters, etc. are also installed between branches and on branches of the ship pipeline system. According to the different types of valves installed in each branch, the corresponding valve opening-flow resistance curve is selected to obtain the simulated flow rate of the oil flowing in the branch; according to the different pumps installed in each branch, the corresponding pump pressure-flow performance curve is selected to obtain the simulated flow rate of the oil flowing in the branch.

[0056] If each branch of the ship pipeline meets the requirement that the initial oil flow rate of the simulation is greater than the critical speed, it means that each branch can meet its critical speed requirement by adjusting the valve opening and pump speed. Then, first confirm the pump speed and valve opening, and then accurately adjust the parameters of each pump and each valve according to the on-site debugging results to meet the flow rate requirements of each branch. If there is a branch that does not meet the requirement that the initial oil flow rate of the simulation is greater than the critical speed, then the series washing branch cannot meet the critical flow rate requirements of each branch. At this time, the branches of the ship pipeline are optimized by oil temperature heating, filter arrangement, adding external pump groups, adjusting pipe diameters, etc. After optimization, they are recalculated according to the latest settings to determine whether the flow rate of each branch is greater than the critical speed. When the simulated initial oil flow rate in the optimized branch is greater than the critical speed, the branches of the ship pipeline system are washed in series.

[0057] This application scheme mainly considers the particle entrainment motion characteristics of the fluid and the sedimentation mechanism of particles in the fluid in the solid-liquid two-phase flow movement, and solves it through one-dimensional pipe network simulation to provide valve and variable frequency pump setting parameters corresponding to different branches, thereby improving the cross-washing efficiency of fuel, lubricating oil, cooling water and other systems.

[0058] It should be understood that the specific process of each module executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0059] 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.

[0060] The third aspect of the present application provides a computer-readable storage medium, on which a program of a method for serial flushing of a ship's pipeline system is stored, so that the method for serial flushing of a ship's pipeline system provided in the first aspect of the present application is executed. As for the aforementioned computer-readable storage medium, those skilled in the art can understand that the implementation example of the functions of the aforementioned system and each unit can be completed by hardware related to the computer program. The aforementioned computer program can be stored in a computer-readable storage medium. When the program is executed, it executes an implementation example including the functions of the aforementioned system and each unit. The aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM or optical disk.

[0061] The fourth aspect of the present application provides an electronic device, comprising: at least one memory for storing programs; at least one processor for executing the programs stored in the memory. The electronic device may be a server. The electronic device comprises a processor, a memory, a network interface and a database connected via a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device comprises a non-volatile and / or volatile storage medium, an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the electronic device is used to communicate with an external client via a network connection. When the computer program is executed by the processor, the functions or steps of the ship pipeline system serial washing of the present application are realized.

[0062] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A method for serial washing of a ship piping system, characterized in that: include: Obtaining the pollution level of pollutants in each branch of the ship's piping system, and if the pollution level is greater than a set value, determining that each branch of the ship's piping system needs to be washed in series; If it is determined that each branch of the ship piping system needs to be washed in series, the critical flow velocity and the initial flow velocity of the oil in each branch of the ship piping system are obtained and compared. The critical flow velocity of each branch is calculated by the following formula: Among them, v c represents the critical velocity; α is the adjustment coefficient; c represents the volume fraction of solid particles; n represents the particle Reynolds number R ep Related index; v0 represents the fluid kinematic viscosity; d p represents the diameter of impurity particles; g represents the acceleration of gravity; ρ S represents the solid density; ρ L Indicates the density of the transported fluid; D indicates the inner diameter of the pipe; The subsequent steps are performed according to the comparison result of the initial oil flow velocity and the critical flow velocity. If the comparison result is that the initial oil flow velocity is greater than the critical flow velocity, each branch of the ship pipeline system is washed in series.

2. The method for serial washing of a ship piping system according to claim 1, characterized in that: The initial oil flow velocity is obtained through a simulation process, which includes: Determine information of valves installed in the ship pipeline, determine the opening of the valve according to the information of the valve, and obtain the simulated initial oil flow velocity in each branch of the ship pipeline system according to the opening of the valve and the flow resistance curve of the oil flow; Alternatively, information of a pump installed in the ship's pipeline is determined, the pressure of the pump is determined based on the pump information, a simulated flow rate of the oil flow in each branch of the ship's pipeline system is obtained based on a performance curve of the pump's pressure and the oil flow, and a simulated initial oil flow velocity is calculated based on the simulated flow rate.

3. The method for serial washing of a ship piping system according to claim 2, characterized in that: If the simulated initial oil flow velocity in each branch of the ship pipeline system is less than the critical velocity, the flow oil in each branch of the ship pipeline system is heated, the filters installed on each branch of the ship pipeline system are adjusted, the number of pumps installed in the ship pipeline system is increased, or the pipe diameters of each branch of the ship pipeline system are adjusted.

4. The method for serial washing of a ship piping system according to claim 2, characterized in that: If the simulated initial oil flow velocity in each branch of the ship's pipeline system is greater than the critical speed, the opening of the valves and the pump speed installed on each branch of the ship's pipeline system are set according to the simulation process so that the initial oil flow velocity in each branch of the ship's pipeline system is greater than the critical speed.

5. The method for serial washing of a ship piping system according to claim 1, characterized in that: Also includes: The temperature of the flowing oil in each branch of the ship piping system is obtained, and the fluid kinematic viscosity of the corresponding branch is solved. The temperature of the flowing oil is calculated by measuring the pipe wall temperature, pipe wall thermal conductivity, convection parameter and pipe wall thickness of each branch of the ship piping system.

6. The method for serial washing of a ship piping system according to claim 1, characterized in that: When 1 <R ep <50, n is 4; when 50 <R ep When <100, n is 3.

7. The method for serial washing of a ship piping system according to claim 1, characterized in that: The setting value is level 8 in the NAS standard.

8. A ship pipeline system series washing device, characterized in that: It includes a pollution level judgment module, an oil flow speed comparison module and an execution module, among which: The pollution level judgment module is used to obtain the pollution level of pollutants in each branch of the ship's pipeline system. If the pollution level is greater than a set value, each branch of the ship's pipeline system is washed in series; The oil flow velocity comparison module is used to obtain and compare the critical flow velocity and initial flow velocity of the oil in each branch of the ship's pipeline system when it is determined that each branch of the ship's pipeline system needs to be washed in series. The critical flow velocity of each branch is calculated by the following formula: Among them, v c represents the critical velocity; α is the adjustment coefficient; c represents the volume fraction of solid particles; n represents the particle Reynolds number R ep Related index; υ0 represents the fluid kinematic viscosity; d p represents the diameter of impurity particles; g represents the acceleration of gravity; ρ S represents the solid density; ρ L Indicates the density of the transported fluid; D indicates the inner diameter of the pipe; The execution module is used to execute subsequent steps according to the comparison result of the initial oil flow velocity and the critical flow velocity. If the comparison result is that the initial oil flow velocity is greater than the critical flow velocity, each branch of the ship pipeline system is washed in series.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed on a processor, the processor is caused to execute the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: include: at least one memory for storing a program; At least one processor is used to execute the program stored in the memory, and when the program stored in the memory is executed, the processor is used to execute the method according to any one of claims 1 to 7.

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