Tank storage metering and layering early warning system and method for liquefied natural gas and storage medium

Abstract

The invention provides a tank storage metering and layering early warning system for liquefied natural gas, and the system comprises a main control unit which is used for issuing a measurement operation command to a plurality of instruments distributed at all key positions of a storage tank, and the instruments are used for at least measuring the density, temperature and liquid level height of liquid in the storage tank; the acquisition unit is used for periodically acquiring point location data measured by the instrument through an industrial communication protocol and storing the point location data into a database; the cleaning unit is used for preprocessing the data stored in the database; the analysis unit is used for acquiring instrument measurement data through an API (Application Program Interface) and judging whether the liquid in the storage tank is layered or not and whether layering early warning is triggered or not through layering threshold difference service developed by the server side; and the monitoring unit is used for monitoring the change trend of the preprocessed data in a real-time communication mode and displaying the change trend in a graphical mode. The technical scheme aims to integrate advanced data acquisition, real-time monitoring and intelligent early warning technologies so as to realize comprehensive and accurate management of LNG storage.

Description

Technical Field

[0001] The present application belongs to the field of liquefied natural gas storage tank management, and specifically relates to a liquefied natural gas tank storage metering and layered early warning system, method and storage medium. Technical Background

[0002] Liquefied natural gas tanks are key equipment for the storage and transportation of LNG. Their safety and reliability directly affect the stability of the entire LNG supply chain. Traditional LNG tank management methods mainly rely on regular inspections and empirical judgments. This method is usually based on time-based inspections and maintenance, which can easily lead to missed inspections and failure to detect potential risks in a timely manner. Although regular inspections can detect some obvious problems, they often cannot prevent sudden failures or abnormal situations because these methods are passive and difficult to warn in advance.

[0003] With the advancement of automation technology and the enrichment of data collection methods, LNG tank storage management is gradually developing towards status monitoring based on real-time data. At present, this detection and early warning technology faces many problems, such as the lack of a unified monitoring and early warning framework, which leads to great difficulties in the collection and processing of data points. For example, in existing systems, the amount of accurate and effective data is often insufficient to support reliable early warning monitoring. In addition, status monitoring mainly relies on existing data for analysis, and the results are often trend predictions based on statistical models, which makes it difficult to achieve accurate early warning. Alternatively, most systems rely on traditional preventive maintenance or status detection based on a single factor, and some systems still rely solely on manual observation for fault judgment, which obviously cannot meet modern LNG needs.

[0004] Technical content

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a liquefied natural gas tank storage metering and stratified early warning system, method and storage medium, aiming to integrate advanced data acquisition, real-time monitoring and intelligent early warning technologies to achieve comprehensive and accurate management of LNG tank storage, improve tank safety, and ensure stable storage and transportation of LNG.

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] In a first aspect, an embodiment of the present invention provides a liquefied natural gas tank storage measurement and stratified early warning system, comprising:

[0008] A main control unit is used to issue measurement operation commands to a number of instruments distributed at various key positions of the storage tank, wherein the instruments are used to at least measure the density, temperature and liquid level of the liquid in the storage tank;

[0009] A collection unit, used for periodically acquiring the point data measured by the instrument through an industrial communication protocol and storing the data in a database;

[0010] A cleaning unit, used for preprocessing the data stored in the database;

[0011] An analysis unit is used to obtain the instrument measurement data through an API interface, and to determine whether stratification occurs in the liquid inside the storage tank and whether a stratification warning is triggered through a stratification threshold difference service developed by the server;

[0012] The monitoring unit is used to monitor the changing trend of the pre-processed data through real-time communication and display it graphically.

[0013] Optionally, the system is deployed in a station system, and the server is connected and debugged with a built-in interface opened by the station system to obtain point data measured by the instrument.

[0014] Optionally, judging whether stratification occurs in the liquid inside the storage tank and whether stratification warning is triggered by using a stratification threshold difference service developed by the server side includes:

[0015] After filtering the data obtained by the server, extract the starting density data and the ending density data of this measurement;

[0016] The starting density data and the ending density data are used as input parameters, and are transmitted to the server for difference calculation, and then a judgment is made according to a preset density stratification threshold. If the difference exceeds the density stratification threshold, a stratification warning is triggered.

[0017] Optionally, the system also includes a third-party database; when the stratified warning occurs, the server will store detailed stratified warning information including the instrument measurement data to the third-party database; the stratified warning information includes: the starting density data, the ending density data, the stratified reason description and the stratified warning time.

[0018] Optionally, when it is necessary to view the hierarchical warning information, the Web end interfaces with the server end through a GET request, and adopts the query parameter passing method in the GET request in the HTTP protocol to obtain the hierarchical warning data stored by the server end in the third-party database.

[0019] Optionally, the measurement operation command includes: standard three-point measurement, standard multi-point measurement, measuring one point per meter, measuring ordinary multi-points, and measuring at a specified height.

[0020] Optionally, preprocessing of the data stored in the database during the cleaning includes: outlier detection, data type consistency check, and missing value processing.

[0021] Optionally, the acquisition unit presets a point threshold value for monitoring whether the point data measured by the instrument is in a normal state.

[0022] In a second aspect, an embodiment of the present invention further provides a method for measuring the storage of liquefied natural gas in a tank and providing a stratified early warning, comprising:

[0023] Issue measurement operation commands to a plurality of instruments distributed at various key positions of the storage tank, wherein the instruments are used to at least measure the density, temperature and liquid level of the liquid in the storage tank;

[0024] Periodically acquiring point data measured by the instrument through an industrial communication protocol and storing the data in a database;

[0025] Preprocessing the data stored in the database;

[0026] The instrument measurement data is obtained through the API interface, and the stratification threshold difference service developed by the server is used to determine whether stratification occurs in the liquid inside the storage tank and whether a stratification warning is triggered;

[0027] The changing trend of pre-processed data is monitored through real-time communication and displayed graphically.

[0028] In a third aspect, an embodiment of the present invention further provides a computer-readable medium, which stores at least one instruction, at least one program, code set or instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to form a liquefied natural gas tank storage metering and stratified early warning system.

[0029] The early warning system of this technical solution effectively ensures that the stratification phenomenon can be identified and handled accurately in a timely manner through efficient key point data comparison and stratification judgment mechanism, real-time data subscription and update, accurate data storage and early warning generation. At the same time, through the flexible query function of the Web terminal, users can easily view and analyze stratification data, thereby optimizing operational decisions and improving the safety of production and operation.

[0030] Instruction Manual

[0031] Figure 1 A schematic diagram of a liquefied natural gas tank storage measurement and stratified early warning system provided by an embodiment of the present invention;

[0032] Figure 2 A schematic flow chart of a method for measuring tank storage and stratified early warning of liquefied natural gas provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0034] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0035] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0036] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0037] refer to Figure 1 The embodiment of the present invention provides a liquefied natural gas tank storage measurement and layered early warning system, including:

[0038] The main control unit is used to issue measurement operation commands to a number of instruments distributed at various key positions of the storage tank, and the instruments are used to measure at least the density, temperature and liquid level of the liquid in the storage tank;

[0039] The acquisition unit is used to periodically obtain the point data measured by the instrument through the industrial communication protocol and store it in the database;

[0040] A cleaning unit, used for preprocessing the data stored in the database;

[0041] The analysis unit is used to obtain instrument measurement data through the API interface and determine whether stratification occurs in the liquid inside the tank and whether a stratification warning is triggered through the stratification threshold difference service developed by the server;

[0042] The monitoring unit is used to monitor the changing trend of the pre-processed data through real-time communication and display it graphically.

[0043] Specifically, a series of precision instrumentation equipment is deployed inside the storage tank, which is evenly distributed at various key positions of the storage tank to monitor the real-time status of liquefied natural gas (LNG). These instruments establish a stable and real-time data communication link with the acquisition unit, which is a data collector in this embodiment, through industrial standard protocols such as MODBUS and OPC. In order to ensure the timeliness and accuracy of data transmission, the data collector has flexible configuration capabilities and allows the data reporting cycle of instrumentation equipment to be customized. Therefore, key point data such as temperature, liquid level, density, etc. can be uploaded from the instrument to the data collector in real time and accurately through these industrial protocols. In particular, after the instrument point data is uploaded to the data collector, the point threshold is set in the data collector to monitor whether the instrument point is in a normal state.

[0044] When the data collector and the instrument communicate stably, the main control unit can issue a measurement operation command through the instrument. In this embodiment, the main control unit is displayed as the main system page. It is intended to measure the liquid level, temperature, density, etc. at different positions and time periods in the storage tank. In order to more accurately monitor the internal state of the storage tank, this embodiment adopts the following command operation methods for testing key point parameters: standard three-point measurement, standard multi-point measurement, one point per meter, ordinary multi-point measurement, specified height measurement and other synchronous measurement methods. In particular, the above measurement operation commands can be executed by the internal meter, liquid level meter and other instruments of the storage tank.

[0045] The operation of the standard three-point measurement command of the meter is taken as an example: before executing the operation command, it is recommended that the float is balanced after the liquid (the float balance state can be judged from the instrument state: 0, the float is not balanced. 1, the float is balanced) and the standard three-point measurement command can be manually issued through the main system page for measurement.

[0046] When the meter uses the standard three-point measurement, the meter will measure the liquid density and temperature near the following three heights. The three-point height comparison table when the meter measures density in the standard three-point method is shown in the following table:

[0047]

[0048] After the instrument command operation is completed, the measured point data at different locations will be displayed on the main system page and stored inside the system. The measured key parameters such as density, temperature, liquid level, etc. are used for calculation and judgment.

[0049] In addition to manually sending commands to the instrument, the system also supports automatic sending of commands. Through the relevant routing menu on the system main page, the system parameters are configured, the command execution time and execution operation are selected. After the configuration is completed, the instrument can receive the relevant configuration parameters to automatically send the reading point data operation. The subsequent data processing and data analysis are the same as the manual sending of commands.

[0050] After the operation command is issued to the instrument, the obtained point data is safely and independently stored in the system's proprietary database, and the measured data is monitored in real time to ensure the integrity and easy maintenance of the data. At the same time, the cleaning unit strictly detects and pre-processes the point data stored in the database, including but not limited to: abnormal value detection, data type consistency check detection and missing value processing.

[0051] After cleaning, the data is displayed graphically through the monitoring unit to show the trend of the data, thus achieving the following:

[0052] (1) Real-time data monitoring: Integrate real-time communication methods such as WebSocket to realize the real-time monitoring of the data change trend of key points in the tank. (2) Graphical display: In the main system page, use a line chart to intuitively display the change curve of key parameters in a specific time period. (3) Rapid warning identification: Combined with a graphical interface, it is convenient to improve the sensitivity of site personnel to abnormal data. In particular, the monitoring unit mainly realizes the warning of temperature and liquid level changes, while the stratified warning of the tank is realized through the analysis unit.

[0053] Specifically, the system uses the layered threshold difference service developed by the server to determine whether there will be stratification inside the tank. The following is an example of generating a stratification warning based on the measured tank density in this embodiment:

[0054] In order to ensure the Java server development specifications and the needs of later expansion, the server interface development will adopt the restful style (HTTP-based architecture style). Through docking and joint debugging with the built-in interface opened by the station system, real-time data acquisition is achieved. The liquefied natural gas tank storage metering and hierarchical early warning system of this embodiment is deployed in the station system.

[0055] After executing the instrument operation command, the server will conduct joint debugging with the built-in interface opened by the station system. After the interface joint debugging is successful, the server will obtain the point data measured by the instrument this time. By filtering these data, the starting density data and ending density data of this measurement can be extracted.

[0056] The obtained density start data and end data are taken as input parameters and passed to the density stratification difference service written by the server for difference verification. The service will calculate the difference between the start density data and the end density, and compare it with the set density stratification threshold. If the difference exceeds the threshold, the server will determine that a stratification warning phenomenon has occurred, otherwise it has not occurred.

[0057] When a stratification warning is detected in the density point data, the server will take prompt action to store the detailed stratification warning information including the instrument measurement data in a third-party database (such as MySQL) for subsequent query and analysis. These generated warning data will include but are not limited to the following fields: (1) The starting density of the point: that is, the density value before the stratification warning occurs; (2) Description of the stratification cause: a detailed description of the stratification warning to help users understand the background and possible impact of the stratification; (3) The stratification warning time: the time when the stratification warning occurs, to help users search and view; (4) The Web end uses the GET request to interface with the server, and uses the query parameter transmission method in the GET request in the HTTP protocol to obtain the stratification warning data stored by the server in the third-party database. Users can view these stratification warning data through the Web end, and can use the search function of the Web end to filter and search according to conditions such as time period or tank name.

[0058] Through precise data collection and intelligent analysis, the system allows operators to fully understand the status of the storage tank, conduct performance evaluation and trend analysis, and conduct in-depth statistical analysis of historical data and real-time data to generate detailed safety warning reports, providing users with key operational guidance and decision support. In addition, users can monitor the status of storage tanks and stratification risks at any time through a graphical interface to achieve efficient monitoring of the status of storage tank equipment. In addition, the system's efficient warning and maintenance mechanism reduces losses caused by equipment failures, thereby further reducing overall operating costs and providing strong technical support for the storage and transportation of liquefied natural gas.

[0059] In addition, an embodiment of the present invention further provides a method for measuring the storage of liquefied natural gas in a tank and providing a stratified early warning, comprising:

[0060] Issue measurement operation commands to several instruments distributed at various key positions of the storage tank, the instruments are used to measure at least the density, temperature and liquid level of the liquid in the storage tank;

[0061] The point data measured by the instrument is periodically acquired through the industrial communication protocol and stored in the database;

[0062] Preprocess the data stored in the database;

[0063] Obtain instrument measurement data through the API interface, and use the layer threshold difference service developed on the server to determine whether stratification occurs in the liquid inside the tank and whether a stratification warning is triggered;

[0064] The changing trend of pre-processed data is monitored through real-time communication and displayed graphically.

[0065] The technical effect that can be achieved by this embodiment is basically the same as the technical effect that can be achieved by the aforementioned liquefied natural gas tank storage metering and stratified early warning system, and will not be repeated here.

[0066] Furthermore, an embodiment of the present invention further provides a computer-readable medium, which stores at least one instruction, at least one program, code set or instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to form a liquefied natural gas tank storage metering and stratified warning system.

[0067] Since the system / device described in the above embodiments of the present invention is a system / device used to implement the method of the above embodiments of the present invention, a person skilled in the art can understand the specific structure and deformation of the system / device based on the method described in the above embodiments of the present invention, and thus will not be described in detail here. All systems / devices used in the method of the above embodiments of the present invention belong to the scope of protection of the present invention.

[0068] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0069] The present invention is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present invention. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions.

[0070] The electronic device includes a computing unit, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) or a computer program loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for the operation of the device can also be stored. The computing unit, ROM and RAM are connected to each other through a bus. An input / output (I / O) interface is also connected to the bus.

[0071] A computer system may include clients and servers. Clients and servers are generally remote from each other and usually interact through a communication network. The relationship of client and server is generated by computer programs running on respective computers and having a client-server relationship to each other.

[0072] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc. In the present application, the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present invention. In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0073] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A liquefied natural gas tank storage measurement and stratification early warning system, characterized in that The system includes: A main control unit is used to issue measurement operation commands to a number of instruments distributed at various key positions of the storage tank, wherein the instruments are used to at least measure the density, temperature and liquid level of the liquid in the storage tank; A collection unit, used for periodically acquiring the point data measured by the instrument through an industrial communication protocol and storing the data in a database; A cleaning unit, used for preprocessing the data stored in the database; An analysis unit is used to obtain the instrument measurement data through an API interface and determine whether stratification occurs in the liquid inside the storage tank and whether a stratification warning is triggered through a stratification threshold difference service developed by the server; The monitoring unit is used to monitor the changing trend of the pre-processed data through real-time communication and display it graphically.

2. A liquefied natural gas tank storage measurement and stratified early warning system as claimed in claim 1, characterized in that The system is deployed in the station system, and the server is connected and debugged with the built-in interface opened by the station system to obtain the point data measured by the instrument.

3. A liquefied natural gas tank storage measurement and stratified early warning system as claimed in claim 1, characterized in that The stratification threshold difference service developed by the server determines whether stratification occurs in the liquid inside the tank and whether a stratification warning is triggered, including: After filtering the data obtained by the server, extract the starting density data and the ending density data of this measurement; The starting density data and the ending density data are used as input parameters, and are transmitted to the server for difference calculation, and then a judgment is made according to a preset density stratification threshold. If the difference exceeds the density stratification threshold, a stratification warning is triggered.

4. A liquefied natural gas tank storage measurement and stratified early warning system as claimed in claim 3, characterized in that The system also includes a third-party database; when the layered warning occurs, the server stores detailed layered warning information including the current instrument measurement data in the third-party database; The stratified warning information includes: the starting density data, the ending density data, a description of the stratified cause and the stratified warning time.

5. A liquefied natural gas tank storage measurement and stratified early warning system as claimed in claim 4, characterized in that When it is necessary to view the hierarchical warning information, the Web end performs interface joint debugging with the server end through a GET request, and adopts the query parameter passing method in the GET request in the HTTP protocol to obtain the hierarchical warning data stored by the server end in the third-party database.

6. A liquefied natural gas tank storage measurement and stratified early warning system as claimed in claim 1, characterized in that The measurement operation commands include: standard three-point measurement, standard multi-point measurement, measuring one point per meter, measuring ordinary multi-points, and measuring at a specified height.

7. A liquefied natural gas tank storage measurement and stratified early warning system as claimed in claim 1, characterized in that The preprocessing of the data stored in the database in the cleaning unit includes: abnormal value detection, data type consistency check detection, and missing value processing.

8. A liquefied natural gas tank storage measurement and stratified early warning system as claimed in claim 1, characterized in that The acquisition unit presets a point threshold value for monitoring whether the point data measured by the instrument is in a normal state.

9. A method for measuring the storage of liquefied natural gas in tanks and providing a stratified early warning, characterized in that include: Issue measurement operation commands to a plurality of instruments distributed at various key positions of the storage tank, wherein the instruments are used to at least measure the density, temperature and liquid level of the liquid in the storage tank; Periodically acquiring point data measured by the instrument through an industrial communication protocol and storing the data in a database; Preprocessing the data stored in the database; The instrument measurement data is obtained through the API interface, and the stratification threshold difference service developed by the server is used to determine whether stratification occurs in the liquid inside the storage tank and whether a stratification warning is triggered; The changing trend of pre-processed data is monitored through real-time communication and displayed graphically.

10. A computer storage medium, characterized in that: The storage medium stores at least one instruction, at least one program, code set or instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to implement a liquefied natural gas tank inventory measurement and stratified early warning system as described in any one of claims 1-8.

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