Gas supply control system and LNG (Liquefied Natural Gas) supply system
By designing a gas supply control system that integrates control and monitoring functions, and making the safety protection function independent, the problem of increased failure rates caused by the large space occupied by the auxiliary system and signal interaction in the LNG gas supply system is solved, improving system reliability and reducing costs. Maintenance costs.
Patent Information
- Application Number
- CN202323515467.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-22
AI Technical Summary
The auxiliary system occupies a large space in the existing LNG gas supply system, and signal interaction leads to an increase in system failure rate, reducing equipment reliability and increasing maintenance costs.
Design an air supply control system, including multiple workstations, safety systems, control systems and auxiliary systems. The auxiliary system signals are collected through the first input and output module and the second input and output module and transmitted to the control module to realize control and monitoring functions. Integration and independence of security protection functions.
It reduces the space occupied by auxiliary system equipment, equipment debugging cycles and failure rates, improves the reliability of the air supply control system, and avoids safety protection failures caused by control system failures.
Smart Images
Figure CN222377843U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of automatic control technology, and specifically relates to a gas supply control system and a LNG gas supply system. Background Art
[0002] LNG (Liquefied Natural Gas) is widely used in ships as a clean power source. The LNG gas supply system is an important component of providing ship navigation power and can reduce exhaust emissions. The LNG gas supply system is equipped with auxiliary systems such as nitrogen system, tank monitoring system, BOG (Boil-Off Gas) system, etc. Each system is monitored by sensors such as pressure, temperature, ventilation, pressure difference, liquid level, flow, etc. Various types of sensors are distributed throughout the gas supply system and power system. At present, the control equipment in each auxiliary system is connected to the corresponding control system, and then connected to the gas supply control system through TCP / IP (Transmission Control Protocol / Internet Protocol), Modbus RTU (Remote Terminal Unit) and other communication or hard point methods to form system control. The auxiliary system will greatly increase the cabin space and affect the hull structure design. The signal interaction between the various systems will increase the system failure rate, reduce the reliability of the equipment, and increase the maintenance cost of the system. Utility Model Content
[0003] Purpose of the utility model: An embodiment of the present application provides a gas supply control system, aiming to solve the technical problems that the auxiliary system occupies a large space and the signal interaction leads to an increased system failure rate; another purpose of the embodiment of the present application is to provide an LNG gas supply system.
[0004] Technical solution: A gas supply control system according to an embodiment of the present application includes:
[0005] Multiple workstations;
[0006] A security system, connected to the plurality of workstations respectively, comprises a plurality of first control modules and first input-output modules connected to the plurality of first control modules respectively;
[0007] A control system, connected to the plurality of workstations respectively, comprising a plurality of second control modules and second input-output modules connected to the plurality of second control modules respectively;
[0008] The auxiliary system, at least part of the auxiliary system is connected to the first input-output module, and at least part of the auxiliary system is connected to the second input-output module.
[0009] In some embodiments, the plurality of first control modules include a first main processor and a first backup processor, the first main processor and the first backup processor are respectively connected to the first input / output module, and the first main processor and the first backup processor are connected to each other; and / or
[0010] The plurality of second control modules include a second main processor and a second standby processor. The second main processor and the second standby processor are respectively connected to the second input / output module, and the second main processor and the second standby processor are connected to each other.
[0011] In some embodiments, the auxiliary system includes a water glycol unit, a nitrogen unit, a storage tank connection unit, a BOG unit, a gasification unit, a filling unit, and a gas detection unit, and the water glycol unit, the nitrogen unit, the storage tank connection unit, the BOG unit, the gasification unit, the filling unit, and the gas detection unit are respectively connected to the first input and output module and / or the second input and output module.
[0012] In some embodiments, the gas detection unit is connected to the first input-output module and the second input-output module.
[0013] In some embodiments, the water glycol unit and the nitrogen unit are respectively connected to the second input and output module.
[0014] In some embodiments, the auxiliary system includes an isolation barrier module, the isolation barrier module includes a first isolation barrier and a second isolation barrier, the first isolation barrier connects the first input-output module and at least part of the auxiliary system, and the second isolation barrier connects the second input-output module and at least part of the auxiliary system.
[0015] In some embodiments, the storage tank connection unit, the BOG unit, the gasification unit, and the filling unit are respectively connected to the first input and output module through a first isolation fence.
[0016] In some embodiments, the storage tank connection unit, the BOG unit, the gasification unit, and the filling unit are respectively connected to the second input and output module through a second isolation fence.
[0017] In some embodiments, the multiple workstations include a first workstation and a second workstation, the gas supply control system includes a first optical fiber and a second optical fiber, and the safety system, the control system, the first workstation and the second workstation are connected respectively via the first optical fiber and the second optical fiber.
[0018] In some embodiments, the first input-output module includes a first communication module, a first digital input-output module, a first analog input-output module, and a first thermistor module.
[0019] In some embodiments, the second input-output module includes a second communication module, a second digital input-output module, a second analog input-output module, and a second thermistor module.
[0020] In some embodiments, the isolation barrier module is an intrinsically safe isolation barrier.
[0021] Correspondingly, an LNG gas supply system described in an embodiment of the present application includes the above-mentioned gas supply control system.
[0022] Beneficial effects: A gas supply control system according to an embodiment of the present application includes multiple workstations, a safety system, a control system and an auxiliary system. The safety system is connected to multiple workstations respectively, including multiple first control modules and first input-output modules connected to the multiple first control modules respectively. The control system is connected to multiple workstations respectively, including multiple second control modules and second input-output modules connected to the multiple second control modules respectively. The auxiliary system, at least part of the auxiliary system is connected to the first input-output module, and at least part of the auxiliary system is connected to the second input-output module. The first input-output module and the second input-output module collect signals of the auxiliary system and transmit them to the first control module and the second control module respectively. The first control module receives the signal sent by the first input-output module, and outputs the corresponding safety protection signal to the corresponding auxiliary system through the first input-output module. The second control module receives the signal sent by the second input-output module, and outputs the corresponding control signal to the corresponding auxiliary system through the first input-output module. In an embodiment of the present application, the gas supply control system integrates the control and monitoring functions in the control system, and integrates the safety protection function in the safety system, which can reduce the equipment space occupation, equipment debugging cycle and failure rate of the auxiliary system of the auxiliary system, and improve the reliability of the gas supply control system. In addition, the independent control system and safety system can avoid the failure of the safety protection of the gas supply control system when a control system failure occurs.
[0023] The LNG gas supply system of the embodiment of the present application includes the above-mentioned gas supply control system, so the LNG gas supply system can have all the technical features and beneficial effects of the above-mentioned gas supply control system, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0025] Figure 1 is a flow chart of a gas supply control system according to an embodiment of the present application;
[0026] Figure 2 is a flow chart of a security system according to an embodiment of the present application;
[0027] Figure 3 It is a flow chart of a control system according to an embodiment of the present application.
[0028] Reference numerals: 1, workstation; 2, safety system; 3, control system; 4, auxiliary system; 5, first optical fiber; 6, second optical fiber; 10, first workstation; 11, second workstation; 20, first control module; 21, first input-output module; 30, second control module; 31, second input-output module; 40, water glycol unit; 41, nitrogen unit; 42, tank connection unit; 43, BOG unit; 44, gasification unit; 45, filling unit; 46, gas detection unit; 47, isolation fence module; 200, first main processor; 201, first backup processor; 210, first communication module; 211, first digital input and output module; 212, first analog input and output module; 213, first thermistor module; 300, second main processor; 301, second backup processor; 310, second communication module; 311, second digital input and output module; 312, second analog input and output module; 313, second thermistor module; 470, first isolation barrier; 471, second isolation barrier. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0030] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "plurality" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.
[0031] LNG (Liquefied Natural Gas) is widely used in ships as a clean power source. The LNG gas supply system is an important component of providing ship navigation power and can reduce exhaust emissions. The LNG gas supply system is equipped with auxiliary systems such as nitrogen system, tank monitoring system, BOG (Boil-Off Gas) system, etc. Each system is monitored by sensors such as pressure, temperature, ventilation, pressure difference, liquid level, flow, etc. Various types of sensors are distributed throughout the gas supply system and power system. At present, the control equipment in each auxiliary system is connected to the corresponding control system, and then connected to the gas supply control system through TCP / IP (Transmission Control Protocol / Internet Protocol), Modbus RTU (Remote Terminal Unit) and other communication or hard point methods to form system control. The auxiliary system will greatly increase the cabin space and affect the hull structure design. The signal interaction between the various systems will increase the system failure rate, reduce the reliability of the equipment, and increase the maintenance cost of the system.
[0032] In view of this, the present application provides a gas supply control system and an LNG gas supply system, including multiple workstations, a safety system, a control system and an auxiliary system. The safety system is connected to the multiple workstations respectively, including multiple first control modules and first input-output modules connected to the multiple first control modules respectively. The control system is connected to the multiple workstations respectively, including multiple second control modules and second input-output modules connected to the multiple second control modules respectively. The auxiliary system, at least part of the auxiliary system is connected to the first input-output module, and at least part of the auxiliary system is connected to the second input-output module. The first input-output module and the second input-output module collect signals of the auxiliary system and transmit them to the first control module and the second control module respectively. The first control module receives the signal sent by the first input-output module, and outputs the corresponding safety protection signal to the corresponding auxiliary system through the first input-output module. The second control module receives the signal sent by the second input-output module, and outputs the corresponding control signal to the corresponding auxiliary system through the first input-output module. In an embodiment of the present application, the gas supply control system integrates the control and monitoring functions in the control system, and integrates the safety protection function in the safety system, which can reduce the equipment space occupation, equipment debugging cycle and failure rate of the auxiliary system of the auxiliary system, and improve the reliability of the gas supply control system. In addition, the independent control system and safety system can avoid the failure of the safety protection of the gas supply control system when a control system failure occurs.
[0033] The gas supply control system and the LNG gas supply system of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.
[0034] refer to Figure 1 The present application provides a gas supply control system, comprising a plurality of workstations 1, a safety system 2, a control system 3 and an auxiliary system 4. The safety system 2 is connected to the plurality of workstations 1, and comprises a plurality of first control modules 20 and a first input-output module 21 connected to the plurality of first control modules 20. The control system 3 is connected to the plurality of workstations 1, and comprises a plurality of second control modules 30 and a second input-output module 31 connected to the plurality of second control modules 30. The auxiliary system 4, at least part of the auxiliary system 4 is connected to the first input-output module 21, and at least part of the auxiliary system 4 is connected to the second input-output module 31. The first input-output module 21 and the second input-output module 31 collect signals of the auxiliary system 4 and transmit them to the first control module 20 and the second control module 30 respectively. The first control module 20 receives the signal sent by the first input-output module 21, and outputs the corresponding safety protection signal to the corresponding auxiliary system 4 through the first input-output module 21. The second control module 30 receives the signal sent by the second input-output module 31, and outputs the corresponding control signal to the corresponding auxiliary system 4 through the first input-output module 21. In the embodiment of the present application, the gas supply control system integrates the control and monitoring functions into the control system 3, and integrates the safety protection function into the safety system 2, which can reduce the equipment space occupied by the auxiliary system 4, the equipment debugging cycle and the failure rate of the auxiliary system 4, and improve the reliability of the gas supply control system. In addition, the control system 3 and the safety system 2 are independent of each other, and the level of the safety system 2 is higher than that of the control system 3, which can avoid the failure of the safety protection of the gas supply control system when the control system 3 fails.
[0035] In some embodiments, the plurality of first control modules 20 include a first main processor 200 and a first standby processor 201, the first main processor 200 and the first standby processor 201 are respectively connected to the first input / output module 21, and the first main processor 200 and the first standby processor 201 are connected to each other. The first main processor 200 has output control authority, and the first standby processor 201 synchronously collects data and maintains communication connection with the first main processor 200, thereby maintaining synchronization with the first main processor 200. The first main processor 200 and the first standby processor 201 monitor each other's operating status and communication status. When the first main processor 200 fails, the first standby processor 201 obtains output control authority, and disturbance-free switching can be achieved.
[0036] In some embodiments, the plurality of second control modules 30 include a second main processor 300 and a second standby processor 301, the second main processor 300 and the second standby processor 301 are respectively connected to the second input / output module 31, and the second main processor 300 and the second standby processor 301 are connected to each other. The second main processor 300 has output control authority, and the second standby processor 301 synchronously collects data and maintains communication connection with the second main processor 300, thereby maintaining synchronization with the second main processor 300. The second main processor 300 and the second standby processor 301 monitor each other's operating status and communication status. When the second main processor 300 fails, the second standby processor 301 obtains output control authority, and disturbance-free switching can be achieved.
[0037] In some embodiments, the auxiliary system 4 includes a water glycol unit 40, a nitrogen unit 41, a storage tank connection unit 42, a BOG unit 43, a gasification unit 44, a filling unit 45, and a gas detection unit 46. The water glycol unit 40, the nitrogen unit 41, the storage tank connection unit 42, the BOG unit 43, the gasification unit 44, the filling unit 45, and the gas detection unit 46 are respectively connected to the first input-output module 21 and / or the second input-output module 31. Some units in the auxiliary system 4 are connected to the first input-output module 21, some units in the auxiliary system 4 are connected to the second input-output module 31, and some units in the auxiliary system 4 are connected to both the first input-output module 21 and the second input-output module 31. The water glycol unit 40, nitrogen unit 41, tank connection unit 42, BOG unit 43, gasification unit 44, filling unit 45, and gas detection unit 46 transmit and send signals respectively through hard point methods, and are centrally calculated by the safety system 2 and the control system 3. The hard point connection reduces the failure rate of the auxiliary system 4 and improves the reliability of the gas supply control system.
[0038] In some embodiments, the gas detection unit 46 is connected to the first input-output module 21 and the second input-output module 31, respectively. Specifically, the gas detection unit 46 provides the control system 3 with real-time data of each detection point. The second control module 30 of the control system 3 performs alarm processing when the collected real-time data reaches a preset concentration range value, and outputs an audible and visual alarm signal in the area. The first control module 20 of the safety system 2 performs shutdown processing when the collected real-time data reaches a preset concentration range value, and urgently cuts off the control valve in the gas supply control system to stop the gas flow, stop the LNG pump operation, and stop the generation of BOG.
[0039] In some embodiments, the water glycol unit 40 and the nitrogen unit 41 are connected to the second input-output module 31, respectively. Specifically, the water glycol unit 40 integrates a water glycol pump, a steam pipeline, a cold water pipeline, and an expansion water tank. The second control module 30 in the control system 3 collects the state of the water glycol pump, the temperature of the steam pipeline and the cold water pipeline, and the liquid level and temperature of the expansion water tank through the second input-output module 31, and outputs signals to control the control valves and regulating valves of the water glycol pump and the control pipeline to perform heating cycles and cooling cycles. The nitrogen unit 41 provides nitrogen with a concentration of more than 95% to the system for purging and inerting. The second control module 30 collects the pressure of the nitrogen tank through the second input-output module 31, and outputs signals to control the opening and closing of the nitrogen system, thereby realizing automatic start and stop of the nitrogen unit 41.
[0040] In some embodiments, the auxiliary system 4 includes an isolation barrier module 47, and the isolation barrier module 47 includes a first isolation barrier 470 and a second isolation barrier 471. The first isolation barrier 470 connects the first input-output module 21 and at least part of the auxiliary system 4, and the second isolation barrier 471 connects the second input-output module 31 and at least part of the auxiliary system 4. The isolation barrier module 47 electrically isolates the control system 3 and the safety system 2 from the electrical equipment in the auxiliary system 4, respectively, and has the function of converting signals.
[0041] In some embodiments, the tank connection unit 42, the BOG unit 43, the gasification unit 44 and the filling unit 45 are respectively connected to the first input-output module 21 through the first isolation fence 470. The tank connection unit 42, the BOG unit 43, the gasification unit 44 and the filling unit 45 are respectively connected to the second input-output module 31 through the second isolation fence 471. Specifically, the tank connection unit 42 integrates the LNG pump, the tank liquid level, pressure, temperature and flow, the control valve, the regulating valve, the gas probe and the smoke temperature probe. After receiving the gas supply demand, the control system 3 outputs a signal through the second control module 30 to adjust the LNG pump, open the control valve and the regulating valve on the pipeline, first keep the LNG pump self-circulating, wait for the pipeline pressure and flow to meet the requirements, and then gradually open the gas supply valve to supply low-temperature LNG to the gasification unit 44. The safety system 2 receives safety signals such as pressure and temperature. When the safety protection is triggered, the first control module 20 outputs a signal to urgently cut off the gas supply valve and LNG pump. The BOG unit 43 is used to deliver the LNG gas from the gasification unit 44 to the preheater inlet in the compressor module, and then deliver it to the main engine, generator and boiler after being compressed by the compressor. Thereby maintaining the pressure of the LNG tank. The second input-output module 31 in the control system 3 collects the pressure and temperature of the BOG inlet. When the temperature and pressure meet the conditions, the inlet and outlet valves are opened. The second input-output module 31 collects the inlet and outlet valve opening signal, and controls the regulating valve to perform PID (Proportional-Integral-Derivative) adjustment following the BOG temperature, thereby keeping the BOG pressure constant. The first input-output module 21 in the safety system 2 collects pressure and temperature signals. When the safety protection is triggered, the first control module 20 outputs a signal to urgently cut off the BOG to stop the generation of BOG. The gasification unit 44 is used to heat the low-temperature LNG into natural gas at room temperature, and provide the gas that meets the use requirements to the main engine, generator and boiler. The second input-output module 31 in the control system 3 collects the temperature and pressure in the gasification pipeline. After the control system 3 receives the gas supply demand, the control system 3 completes the self-check and sends a signal that the gas supply control system is ready to the operator. The operator gives a signal to open the gas supply valve, and the second control module 30 in the control system 3 outputs a signal to open the gas supply valve. The first input-output module 21 in the safety system 2 collects temperature signals. When the safety protection is triggered, the BOG, LNG pump and gas supply valve are urgently cut off. The filling unit 45 is used for LNG filling. The second input-output module 31 in the control system 3 collects pressure and temperature signals, and the second control module 30 outputs a signal to control the opening and closing of the filling valve. The first input-output module 21 in the safety system 2 collects the temperature of the low-pressure plate. When the safety protection is triggered, the first control module 20 outputs a signal to urgently cut off the filling valve.
[0042] In some embodiments, the plurality of workstations 1 include a first workstation 10 and a second workstation 11, the air supply control system includes a first optical fiber 5 and a second optical fiber 6, and the safety system 2, the control system 3, the first workstation 10 and the second workstation 11 are connected respectively through the first optical fiber 5 and the second optical fiber 6. The first workstation 10 is located in the control room, and the second workstation 11 is located in the cab. Through the dual-optical fiber redundant connection, it is ensured that the air supply control system commands and collected data can be transmitted efficiently, quickly and stably. The workstation 1 implements dual-network topology communication with the control system 3 and the safety system 2, and the redundant communication avoids communication failures due to a single network, so that the workstation 1 cannot display the operating status of the air supply control system in real time.
[0043] exist Figure 2 and Figure 3In the illustrated embodiment, the first input-output module 21 includes a first communication module 210, a first digital input-output module 211, a first analog input-output module 212, and a first thermistor module 213. The second input-output module 31 includes a second communication module 310, a second digital input-output module 311, a second analog input-output module 312, and a second thermistor module 313. The first communication module 210 is used to receive a signal sent to the safety system 2 on board, implement the protection function of the safety system 2, and send the safety system 2 signal to the monitoring system on board (not shown). The second communication module 310 is used to send a signal to the control system 3 on board, implement the control function of the control system 3, and send the control system 3 signal to the monitoring system on board. The first communication module 210 and the second communication module 310 use full-duplex Modbus RS485 (communication protocol), and full-duplex communication allows the device to perform two-way data transmission at the same time, and the gas supply control system and the monitoring system on board can exchange data through a serial communication line. The first digital input-output module 211 and the second digital input-output module 311 are used to collect discrete signals such as valve and sensor triggers. The first analog input and output module 212 and the second analog input and output module 312 are used to collect continuously changing signals such as temperature, pressure, and liquid level. The first digital input and output module 211 and the first analog input and output module 212 collect signals such as temperature sensors, pressure sensors, liquid levels, and gas detection for safety protection and send them to the first control module 20, and receive control signals sent by the first control module 20 to urgently cut off pumps, BOG, and valves. The second digital input and output module 311 and the second analog input and output module 312 collect signals such as LNG pumps, BOG, water glycol pumps, control valves, temperature sensors, pressure sensors, differential pressure sensors, and send them to the second control module 30, and receive control signals sent by the second control module 30 to control the start and stop of pumps, BOG, valves, indicator lights, and gas supply systems. The first thermistor module 213 is used to collect resistance signals and send them to the first control module 20 and receive control signals sent by the first control module 20 to urgently cut off pumps, BOG, and valves. The second thermistor module 313 is used to collect resistance signals and send them to the second control module 30 and receive control signals sent by the second control module 30 to control the start and stop of the pump, BOG, valve and gas supply system.
[0044] In some embodiments, the isolation fence module 47 is an intrinsically safe isolation fence, which is used to isolate the equipment in the dangerous area and the safe area. The intrinsically safe isolation fence can prevent large currents from impacting the equipment in the safety system 2 or the control system 3, and isolate electrical signals between different areas or equipment to ensure the safety of equipment and personnel.
[0045] In some embodiments, the first isolation barrier 470 includes a first digital quantity input intrinsically safe isolation barrier, a first digital quantity output intrinsically safe isolation barrier, a first analog quantity input intrinsically safe isolation barrier, a first analog quantity output intrinsically safe isolation barrier, and a first thermistor intrinsically safe isolation barrier. The first digital quantity input intrinsically safe isolation barrier and the first digital quantity output intrinsically safe isolation barrier are respectively connected to the first digital quantity input and output module 211. The first analog quantity input intrinsically safe isolation barrier and the first analog quantity output intrinsically safe isolation barrier are respectively connected to the first analog quantity input and output module 212. The first thermistor intrinsically safe isolation barrier is connected to the first thermistor module 213.
[0046] In some embodiments, the second isolation barrier 471 includes a second digital quantity input intrinsically safe isolation barrier, a second digital quantity output intrinsically safe isolation barrier, a second analog quantity input intrinsically safe isolation barrier, a second analog quantity output intrinsically safe isolation barrier, and a second thermistor intrinsically safe isolation barrier. The second digital quantity input intrinsically safe isolation barrier and the second digital quantity output intrinsically safe isolation barrier are respectively connected to the second digital quantity input and output module 311. The second analog quantity input intrinsically safe isolation barrier and the second analog quantity output intrinsically safe isolation barrier are respectively connected to the second analog quantity input and output module 312. The second thermistor intrinsically safe isolation barrier is connected to the second thermistor module 313.
[0047] An embodiment of the present application also provides an LNG gas supply system, including the above-mentioned gas supply control system.
[0048] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0049] The above is a detailed introduction to a gas supply control system and an LNG gas supply system provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.
Claims
1. A gas supply control system, characterized in that: include: Multiple workstations (1); A security system (2) connected to the plurality of workstations (1) respectively, comprising a plurality of first control modules (20) and first input / output modules (21) respectively connected to the plurality of first control modules (20); the plurality of first control modules (20) comprising a first main processor (200) and a first backup processor (201); the first main processor (200) and the first backup processor (201) are respectively connected to the first input / output modules (21); and the first main processor (200) and the first backup processor (201) are connected to each other; A control system (3) is connected to the plurality of workstations (1) respectively, and comprises a plurality of second control modules (30) and second input-output modules (31) respectively connected to the plurality of second control modules (30); the plurality of second control modules (30) comprise a second main processor (300) and a second backup processor (301); the second main processor (300) and the second backup processor (301) are respectively connected to the second input-output modules (31); and the second main processor (300) and the second backup processor (301) are connected to each other; An auxiliary system (4), at least part of the auxiliary system (4) is connected to the first input-output module (21), and at least part of the auxiliary system (4) is connected to the second input-output module (31).
2. The air supply control system according to claim 1, characterized in that: The auxiliary system (4) comprises a water glycol unit (40), a nitrogen unit (41), a storage tank connection unit (42), a BOG unit (43), a gasification unit (44), a filling unit (45), and a gas detection unit (46); the water glycol unit (40), the nitrogen unit (41), the storage tank connection unit (42), the BOG unit (43), the gasification unit (44), the filling unit (45), and the gas detection unit (46) are respectively connected to the first input-output module (21) and / or the second input-output module (31).
3. The air supply control system according to claim 2, characterized in that: The gas detection unit (46) is connected to the first input-output module (21) and the second input-output module (31).
4. The air supply control system according to claim 2, characterized in that: The water glycol unit (40) and the nitrogen unit (41) are respectively connected to the second input and output module (31).
5. The air supply control system according to claim 2, characterized in that: The auxiliary system (4) comprises an isolation gate module (47), wherein the isolation gate module (47) comprises a first isolation gate (470) and a second isolation gate (471), wherein the first isolation gate (470) connects the first input / output module (21) and at least a part of the auxiliary system (4), and the second isolation gate (471) connects the second input / output module (31) and at least a part of the auxiliary system (4).
6. The air supply control system according to claim 5, characterized in that: The storage tank connection unit (42), the BOG unit (43), the gasification unit (44) and the filling unit (45) are respectively connected to the first input / output module (21) via the first isolation fence (470); and / or The storage tank connection unit (42), the BOG unit (43), the gasification unit (44) and the filling unit (45) are respectively connected to the second input / output module (31) via the second isolation grid (471).
7. The air supply control system according to claim 1, characterized in that: The plurality of workstations (1) include a first workstation (10) and a second workstation (11); the gas supply control system includes a first optical fiber (5) and a second optical fiber (6); the safety system (2), the control system (3), the first workstation (10) and the second workstation (11) are connected respectively via the first optical fiber (5) and the second optical fiber (6).
8. The air supply control system according to claim 1, characterized in that: The first input-output module (21) comprises a first communication module (210), a first digital input-output module (211), a first analog input-output module (212) and a first thermistor module (213); and / or The second input-output module (31) comprises a second communication module (310), a second digital input-output module (311), a second analog input-output module (312) and a second thermistor module (313).
9. The air supply control system according to claim 5, characterized in that: The isolation fence module (47) is an intrinsically safe isolation fence.
10. An LNG gas supply system, characterized in that: Comprising the gas supply control system according to any one of claims 1-9.