Safety control system for FLNG ship
By adopting a distributed structure safety control system on the FLNG ship and integrating multiple functional modules, the problem of difficulty in achieving comprehensive monitoring and management in traditional systems is solved, efficient safety protection and process monitoring are achieved, and the level of safety guarantee is significantly improved.
Patent Information
- Application Number
- CN202411778034.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-03-11
AI Technical Summary
Traditional FLNG ship safety control systems are difficult to achieve comprehensive monitoring and management of the entire operation process, resulting in information silos, response delays and complex management problems.
The safety control system adopts a distributed structure, integrating functional modules such as data acquisition, process control, safety instruments, alarm management, information management, and historical data storage and retrieval. Through the coordinated work of the central control room, the central engineering room, the instrument equipment room and the instrument rack room, the safe, reliable and precise management of the FLNG ship is achieved.
It realizes seamless connection between process monitoring and safety protection, quickly responds to equipment failures or process abnormalities, effectively responds to dangerous situations such as fires and harmful gas leakage, significantly improves the level of safety assurance, and optimizes operating efficiency and maintenance management.
Smart Images
Figure CN119603329A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of FLNG ships, and in particular relates to a safety control system for FLNG ships. Background Art
[0002] As an emerging marine engineering technology, floating liquefied natural gas (FLNG) ships combine the production, storage and transportation functions of liquefied natural gas (LNG), and are of great significance in the exploitation of offshore natural gas resources. However, the operating environment of FLNG ships is complex, involving high temperature, high pressure, flammable and explosive gases and various dangerous working conditions, and safety management faces huge challenges.
[0003] Traditional ship safety control systems are mostly operated independently, making it difficult to fully monitor and manage the entire FLNG operation process. This model may lead to the following problems:
[0004] 1. Information islands: There is a lack of effective communication and collaboration between subsystems, making it impossible to respond quickly to complex emergencies.
[0005] 2. Delayed response: Insufficient data collection and processing speed may result in failure to take emergency measures in time after an accident occurs.
[0006] 3. Complex management: The safety control system has low integration with other production systems, which increases the difficulty of operation and maintenance.
[0007] At present, FLNG ships need a new, safe, reliable and intelligent control system that can fully integrate the ship's production process, safety instrument functions and alarm management, and provide operators with a unified monitoring platform and rapid response mechanism. Summary of the invention
[0008] To solve the above problems, the present invention provides a safety control system for FLNG ships, which adopts a distributed structure and integrates modern industrial control technology to achieve safe, reliable and precise management of complex systems.
[0009] The technical solution provided by the present invention is as follows:
[0010] A safety control system for an FLNG ship, the system adopts a distributed structure, including:
[0011] Central control room, equipped with operating workstations, emergency alarm and action panels, which are centrally monitored by operators;
[0012] A central engineering room, equipped with engineering workstations for high-level management and configuration of safety control systems;
[0013] Instrument equipment room, equipped with servers and DMZ cabinets, the servers are connected to the central control room through thin client and fat client network;
[0014] Instrument rack room, equipped with network cabinet, signal input and output collection cabinet and power distribution cabinet for signal collection and distribution;
[0015] System functions include: data acquisition, process control system, safety instrument system, alarm management system, information management system, historical data storage and retrieval system.
[0016] In some embodiments, the process control system includes a control and data management system for providing data acquisition, process control, alarm signaling, alarm logging, interfacing with other systems, production report generation, and an operator interface for production operations.
[0017] In some embodiments, a safety instrumented system includes input sensors, logic solvers, and output actuators that perform safety instrumented functions by taking actions to prevent hazards or mitigate consequences, including emergency shutdown systems and fire and gas detection systems.
[0018] In some embodiments, an emergency shutdown system is used to detect process anomalies and execute equipment shutdown, including process sensors and manual input devices connected to a logic solver, the logic solver has input and output circuits and devices, executes shutdown of key equipment, functions as a fail-safe design, supports threshold logic, periodic testing and partial stroke testing.
[0019] In some embodiments, the fire and gas detection system is used to detect fires and gas leaks, configure and operate active fire protection systems, shut down HVAC systems, cut off power, and automatic diagnostic and alarm functions.
[0020] In some embodiments, the alarm management system performs a rational analysis of the alarm information, determines the alarm priority, provides guidance on response actions and response times, supports the rapid location of critical alarms, and optimizes the handling of abnormal situations.
[0021] The information management system is used to provide remote data collection, calibration, fault diagnosis and prediction of intelligent devices, support performance testing, alarm management, parameter optimization and maintenance data records;
[0022] In some embodiments, the historical data storage and retrieval system stores key production data and equipment status information in the form of rolling files to a historical record server to support long-term analysis of maintenance, production, and asset management.
[0023] In some embodiments, the signal input and output acquisition cabinet of the instrument rack room collects liquid level, temperature, pressure, gas detection signals and valve, power system and auxiliary equipment status information through analog quantity, switch quantity, communication and HART protocol.
[0024] In some embodiments, the server in the instrument equipment room is connected to the I / O acquisition cabinet via a network to manage logic programs, alarms, information display and historical data retrieval, and generate production reports.
[0025] In some embodiments, the emergency alarm and action panel in the central control room is connected to the I / O acquisition cabinet via a network. When an emergency alarm is triggered, the operator can perform parking or other emergency operations through the panel.
[0026] In summary, the beneficial effects of the present invention are:
[0027] (1) The system of the present invention realizes seamless connection between process monitoring and safety protection by integrating process control system and safety instrument system. The emergency shutdown system can quickly respond to equipment failure or process abnormality to avoid the expansion of accidents; the fire and gas detection system can effectively respond to dangerous situations such as fire and harmful gas leakage, and significantly improve safety.
[0028] (2) The present invention has a fast response speed, with a data collection and processing delay of less than 50 milliseconds, and can quickly trigger alarms and perform emergency operations in emergency situations such as fire or gas leaks. The alarm management system optimizes the alarm priority setting through rational analysis and hierarchical processing, and operators can quickly locate key alarms and take measures.
[0029] (3) The present invention adopts a distributed structure design, and each module has a redundant backup mechanism, so a single point failure will not affect the overall operation of the system. At the same time, the power distribution cabinet adopts a dual power switching mode to ensure the stability of power supply under severe sea conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 Schematic diagram of the system of the present invention. DETAILED DESCRIPTION
[0031] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The following examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.
[0032] like Figure 1 As shown, a safety control system for FLNG ships adopts a distributed structure, including: a central control room, a central engineering room, an instrument equipment room and an instrument rack room.
[0033] The central control room is equipped with an operation workstation and an emergency alarm and action panel, which is responsible for the centralized monitoring and operation of the system. The operator can achieve global monitoring of production operations through the operation workstation and quickly respond to abnormal or dangerous situations through the emergency panel.
[0034] The central control room is equipped with an operation workstation and a large-screen display terminal, which can monitor the operating status of the FLNG ship in real time, including process flow, equipment status and environmental monitoring parameters. It is also equipped with an emergency alarm and action panel. When the system detects major safety hazards, the operator can quickly implement emergency measures through the panel, such as equipment shutdown, valve closing, etc.
[0035] In this embodiment, the operation interface of the central control room adopts a graphical and modular design, and the displayed information is intuitive and easy to understand, reducing the risk of operator misjudgment.
[0036] The central engineering room is equipped with an engineering workstation, through which engineers perform high-level management and configuration of the system, including the development of logic programs, optimization of system parameters, and authority management.
[0037] The instrument equipment room is mainly equipped with servers and demilitarized zone cabinets (DMZ). The server is connected to the operation workstation and thin client through the network and is responsible for data management, logical operation and alarm processing.
[0038] The instrument rack room is equipped with a network cabinet, a signal input and output acquisition cabinet (I / O cabinet) and a power distribution cabinet to realize the collection and distribution of field signals. The I / O cabinet can collect data from sensors and devices through multiple protocols and transmit the signals to the upper system.
[0039] In order to meet the monitoring, control, information display, emergency operation, historical data storage and query of the normal processing and production of the entire FLNG ship and the auxiliary system, a distributed control system composed of computers, PLCs, I / O signal acquisition modules, servers, operation stations, network systems and firewalls is used. The system mainly includes: data acquisition, process control system, safety instrument system, alarm management system, information management system, historical data storage and retrieval system.
[0040] Among them, the process control system integrates the control and data management system. The main functions of the system are to provide data acquisition, process control, alarm signals, alarm records, interfaces with other auxiliary systems, production report generation and operator interface for production operations. All key system components of the process control system adopt redundant design, and the I / O involved in the control of key loops also achieves redundancy through hot backup configuration. The hardware of the process control system includes supporting hardware such as workstations, networks, cabinets, and consoles.
[0041] A safety instrumented system is a control system that places a process in a safe state in situations where there is a potential for danger or where a danger may eventually occur if no action is taken. It performs a safety instrumented function (SIF) by taking action to prevent the hazard or mitigate the consequences. It consists of inputs (sensors), logic solvers, and outputs (actuators). Safety instrumented systems are functionally divided into two main parts: one dedicated to facility protection (ESD-Emergency Shutdown System) and the other dedicated to facility surroundings monitoring and prevention of fire or gas conditions, etc. (F&GS-Fire and Gas Detection System).
[0042] The emergency shutdown system (ESD) detects equipment overload or failure and automatically shuts down key equipment to avoid safety accidents. The system will include dedicated process sensors and manual input devices connected to a functionally independent dedicated logic solver with dedicated input and output circuits and devices to shut down key equipment, protect process and personnel safety, and adopt a fail-safe design with high reliability and high availability equipment. The main functions are: threshold logic, periodic testing, and partial stroke testing.
[0043] Fire and gas detection system, which continuously monitors all facilities on board and initiates appropriate fire extinguishing and shutdown and alerts personnel by sound and vision when a fire situation or hydrocarbon gas leak is detected. The main functions are: operating active fire fighting system, initiating shutdown system, shutting down heating, ventilation and air conditioning (HVAC) system, power cut-off of related rooms, automatic self-test, fault diagnosis and reporting.
[0044] Alarm Management System (AMS), system alarms warn operators in advance of abnormal situations that may lead to accidents. However, operators cannot quickly and accurately locate key alarms among a large number of alarms and handle abnormal situations in a timely manner. Alarm management system can improve the effectiveness and safety of alarm systems, rationalize analysis, identify the rationality of alarm settings, locate the priority of alarm settings, clarify response actions and response times, and thus optimize alarms.
[0045] Information Management System (IMS) provides secure access to process "smart" devices (instruments and valves), including instruments with separate control systems, and provides online information (diagnosis, performance, parameters) to maintenance personnel. The main functions are: remote data acquisition of smart devices, remote calibration of smart devices, remote diagnosis and fault prediction of smart devices, alarm, performance, testing and calibration of smart devices, data acquisition and storage and troubleshooting.
[0046] Historical data storage and retrieval system, all the key measurement data of the facilities, such as production overview, key information of machines or package equipment, and all other parameters and information useful for maintenance, production and any other advanced asset management, are stored in the form of rolling files in the historian server.
[0047] In a preferred embodiment, the process control system I / O cabinet, emergency shutdown system I / O cabinet, and fire gas detection system I / O cabinet in the instrument rack room of the ship and the electrical room of the upper module collect the liquid level signal, temperature signal, pressure signal, gas detector signal, valve information, solenoid valve information, power system status information, and auxiliary equipment status information of each system through analog quantity, switch quantity, communication, HART (highway addressable remote transducer), etc., and perform corresponding actions after the I / O acquisition cabinet completes the logic processing, such as opening and closing of valves, starting and stopping of pumps and fans, and the action of auxiliary equipment.
[0048] The server in the instrument room on the ship is connected to the I / O cabinet through the network to complete data collection and management of logic programs, alarm management, information management, report production and management, and historical data storage and retrieval. The workstation in the central engineering room on the ship is connected to the server in the instrument room through the network to complete the above operations and management.
[0049] The workstation in the central control room on the ship is connected to the server in the instrument room and the I / O cabinets in the instrument rack room of the ship and the electrical room of the upper module through the network. It manually monitors and judges various information, completes the adjustment of parameters such as flow rate, liquid level and other parameters of daily production tasks, and performs emergency parking operations. The emergency alarm action panel in the central control room is connected to the I / O cabinet through the network. When an emergency alarm appears on the panel, the corresponding equipment needs to be operated or stopped.
[0050] In summary, the present invention provides a safety control system suitable for FLNG ships, which adopts a distributed architecture design and integrates functional modules such as data acquisition, process control, safety instruments, alarm management, information management, and historical data storage and retrieval, and can efficiently cope with complex offshore operating environments and high-risk operation requirements. The system greatly improves the level of safety assurance through functions such as emergency shutdown, fire and gas detection, and hierarchical alarm management; through modular design and intelligent functions, it optimizes operational efficiency and maintenance management and reduces operating costs. At the same time, the system has high scalability and environmental adaptability, and can be applied to a variety of marine energy development scenarios.
[0051] This system not only provides solid technical support for the safe production of FLNG ships, but also provides new ideas for the development and upgrading of safety control systems in the offshore natural gas extraction and liquefaction industries. It has wide promotion and application value and significant social and economic benefits.
[0052] It should be noted that the implementation methods not shown or described in the drawings or the main text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element and method are not limited to the various specific structures, shapes or methods mentioned in the embodiments.
[0053] It should also be noted that the directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only for reference to the directions of the drawings and are not intended to limit the scope of protection of this application.
[0054] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.
Claims
1. A safety control system for a FLNG ship, characterized in that: The system adopts a distributed structure, including: Central control room, equipped with operating workstations, emergency alarm and action panels, which are centrally monitored by operators; A central engineering room, equipped with engineering workstations for high-level management and configuration of safety control systems; Instrument equipment room, equipped with servers and DMZ cabinets, the servers are connected to the central control room through thin client and fat client network; Instrument rack room, equipped with network cabinet, signal input and output collection cabinet and power distribution cabinet for signal collection and distribution; System functions include: data acquisition, process control system, safety instrument system, alarm management system, information management system, historical data storage and retrieval system.
2. The safety control system for FLNG ship according to claim 1, characterized in that: The process control system includes a control and data management system for providing data acquisition, process control, alarm signals, alarm logging, interfaces with other systems, production report generation and operator interface for production operations.
3. The safety control system for FLNG ship according to claim 1, characterized in that: The safety instrumented system includes input sensors, logic solvers, and output actuators to perform safety instrumented functions by taking actions to prevent hazards or mitigate consequences. Functions include emergency shutdown systems and fire and gas detection systems.
4. The safety control system for FLNG ship according to claim 3, characterized in that: The emergency shutdown system is used to detect process abnormalities and execute equipment shutdown, including process sensors and manual input devices connected to a logic solver. The logic solver has input and output circuits and devices to execute shutdown of key equipment. The function is a fail-safe design and supports threshold logic, periodic testing and partial stroke testing.
5. The safety control system for FLNG ship according to claim 3, characterized in that: The fire and gas detection system is used to detect fire and gas leaks, and is configured to operate active fire protection systems, shut down HVAC systems, cut off power, and automatic diagnosis and alarm functions.
6. The safety control system for FLNG ship according to claim 1, characterized in that: The alarm management system performs rational analysis on alarm information, determines alarm priority, provides guidance on response actions and response times, supports rapid location of key alarms, and optimizes abnormal situation handling.
7. The safety control system for FLNG ship according to claim 1, characterized in that: The information management system is used to provide remote data collection, calibration, fault diagnosis and prediction of intelligent devices, support performance testing, alarm management, parameter optimization and maintenance data records; The historical data storage and retrieval system stores key production data and equipment status information in the form of rolling files to a historical record server to support long-term analysis of maintenance, production and asset management.
8. The safety control system for FLNG ship according to claim 1, characterized in that: The signal input and output acquisition cabinet in the instrument rack room collects liquid level, temperature, pressure, gas detection signals and valve, power system and auxiliary equipment status information through analog quantity, switch quantity, communication and HART protocol.
9. The safety control system for FLNG ship according to claim 1, characterized in that: The server in the instrument equipment room is connected to the I / O acquisition cabinet via a network, and is used to manage logic programs, alarms, information display and historical data retrieval, and generate production reports.
10. The safety control system for FLNG ship according to claim 1, characterized in that: The emergency alarm and action panel of the central control room is connected to the I / O acquisition cabinet via a network. When an emergency alarm is triggered, the operator can perform parking or other emergency operations through the panel.