A ship methanol fuel safety system

Abstract

The present invention belongs to the field of ship technology, and specifically discloses a ship methanol fuel safety system, including: a methanol detection module, a main control module and a safety action execution module, wherein the methanol detection module is used to control the methanol detection unit to collect methanol detection data; the main control module is used to search for corresponding safety action strategies in a preset methanol safety strategy set according to the methanol monitoring data; the safety action execution module is used to control the methanol actuator to execute safety actions according to the safety action strategy. The ship methanol fuel safety system disclosed by the present invention can accurately detect whether the ship methanol fuel leaks, and take appropriate emergency cut-off measures when the methanol fuel leaks, and timely cut off the leakage source, thereby effectively protecting the safety of personnel and ships.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a ship methanol fuel safety system. Background Art

[0002] As a new type of green fuel for ships, methanol has the advantages of sufficient supply, low price, and low pollution after combustion. However, due to the low flash point, flammability, explosion, toxicity, volatility, and invisible flames during combustion, the requirements for using methanol fuel on ships are relatively high, and certain measures need to be taken to protect the safety of personnel and ships. At present, there is no methanol fuel safety system specifically suitable for ships that use and transport methanol fuel. Existing ships using methanol fuel are at risk of methanol fuel leakage, and the safety of ship operation cannot be guaranteed. Summary of the invention

[0003] The present invention provides a ship methanol fuel safety system, which detects the ship methanol fuel in real time during transportation, determines the corresponding safety action strategy according to the collected methanol detection data, and then controls the corresponding methanol actuator to perform the safety action according to the safety action strategy. It can accurately detect whether the ship methanol fuel leaks, and take appropriate emergency cut-off measures when the methanol fuel leaks, and cut off the leakage source in time, thereby effectively protecting the safety of personnel and ships.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A ship methanol fuel safety system includes: a methanol detection module, a main control module and a safety action execution module.

[0006] The methanol detection module is used to control the methanol detection unit to collect methanol detection data;

[0007] The main control module is used to search for a corresponding safety action strategy in a preset methanol safety strategy set according to the methanol monitoring data;

[0008] The safety action execution module is used to control the methanol actuator to execute the safety action according to the safety action strategy.

[0009] As a preferred technical solution of a ship methanol fuel safety system, the methanol detection unit at least includes: a methanol gas detection unit, a methanol liquid detection unit, a methanol fire detection unit and a methanol daily tank safety detection unit. The control of the methanol detection unit to collect methanol detection data includes:

[0010] Controlling the methanol gas detection unit to obtain the methanol gas concentration collected by the methanol gas detection probe;

[0011] Controlling the methanol liquid detection unit to obtain a first liquid level height collected by a methanol liquid leakage float;

[0012] Controlling the methanol fire detection unit to obtain methanol fire data detected by the fire alarm probe;

[0013] The methanol daily tank safety detection unit is controlled to obtain the second liquid level height, the cabin temperature and the cabin pressure detected by the methanol liquid level detection sensor, the temperature sensor and the pressure sensor.

[0014] As a preferred technical solution of a ship methanol fuel safety system, searching for a corresponding safety action strategy in a preset methanol safety strategy set according to the methanol monitoring data includes:

[0015] In the methanol safety system logic table of the preset methanol safety strategy set, a safety action set is determined according to the methanol monitoring data and preset methanol safety conditions.

[0016] As a preferred technical solution of a ship methanol fuel safety system, in the methanol safety system logic table of the preset methanol safety strategy set, a safety action set is determined according to the methanol monitoring data and the preset methanol safety conditions, including at least one of the following:

[0017] When the methanol monitoring data satisfies that the methanol gas concentration is greater than or equal to the preset methanol gas concentration threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank output valve, cutting off the methanol supply unit, and controlling the inerting purge system to remove residual methanol in the pipeline and equipment;

[0018] When the methanol monitoring data satisfies that the first liquid level height is greater than or equal to the first preset liquid level height threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank output valve, cutting off the methanol supply unit, and controlling the inerting purge system to remove residual methanol in the pipeline and equipment;

[0019] When the methanol monitoring data satisfies that the methanol fire alarm data is greater than or equal to the preset fire alarm data threshold, the safety action set is determined in the methanol safety system logic table as: controlling the fire alarm main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily cabin output valve, cutting off the methanol supply unit, controlling the host safety module control box to cut off the host methanol input main valve, controlling the host safety module control box to stop the host methanol mode, controlling the host safety module control box to switch to the fuel mode, and controlling the inerting purge system to remove the residual methanol in the pipeline and equipment;

[0020] When the methanol monitoring data satisfies that the second liquid level height is greater than or equal to the second preset liquid level height threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank input valve, and controlling the methanol main valve control box to cut off the methanol daily tank delivery pump;

[0021] When the methanol monitoring data satisfies that the cabin temperature and cabin pressure are respectively greater than or equal to the preset temperature threshold and the preset pressure threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt.

[0022] As a preferred technical solution of a ship methanol fuel safety system, the control of the methanol actuator to perform a safety action according to the safety action strategy includes:

[0023] According to the security action set in the security action strategy, the corresponding execution mechanism is controlled to execute the security action set.

[0024] As an optimal technical solution for a ship methanol fuel safety system, the actuator includes at least: a methanol safety system main control box, a fire alarm main control box, a methanol main valve control box, a methanol supply unit, a main engine safety module control box, and an inerting purge system.

[0025] As a preferred technical solution for a ship methanol fuel safety system, the methanol detection module further includes an image acquisition unit, and the image acquisition unit is used to monitor the safety status of the ship in real time in combination with the methanol fire detection unit.

[0026] As a preferred technical solution for a ship methanol fuel safety system, the methanol detection module also includes a methanol ventilation unit, which is used to extract methanol escaping from the methanol transmission line.

[0027] As a preferred technical solution for a ship methanol fuel safety system, the methanol detection module also includes a gas flow detection unit, which is used to monitor the gas flow on the methanol transmission line.

[0028] As a preferred technical solution for a ship methanol fuel safety system, the methanol detection module also includes a manual cut-off button, and the setting area of ​​the manual switch button includes at least: a methanol storage area and a methanol delivery route area.

[0029] Beneficial effects of the present invention:

[0030] The present invention provides a ship methanol fuel safety system, which controls the methanol detection unit to collect methanol detection data of methanol fuel during transportation through a methanol detection module, and then the main control module searches for the corresponding safety action strategy in a preset methanol safety strategy set according to the methanol detection data, and then the safety action execution module controls the corresponding methanol execution mechanism to execute the safety action according to the safety action strategy. It can accurately detect whether the ship methanol fuel leaks, and take appropriate emergency cut-off measures when the methanol fuel leaks, and cut off the leakage source in time, thereby effectively protecting the safety of personnel and ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 This is a schematic diagram of the structure of a ship methanol fuel safety system provided according to an embodiment of the present invention;

[0033] Figure 2 It is a structural schematic diagram of another ship methanol fuel safety system provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a ship methanol fuel safety system, comprising:

[0039] Methanol detection module 110, main control module 120 and safety action execution module 130. The methanol detection module 110 is used to control the methanol detection unit to collect methanol detection data; the main control module 120 is used to search for corresponding safety action strategies in the preset methanol safety strategy set according to the methanol monitoring data; the safety action execution module 130 is used to control the methanol actuator to execute safety actions according to the safety action strategy.

[0040] In the embodiment of the present invention, the methanol detection unit may refer to a detection unit designed for the ship methanol fuel safety system according to the relevant characteristics of methanol and the use characteristics of methanol fuel ships. The methanol detection unit may at least include: a methanol gas detection unit, a methanol liquid detection unit, a methanol fire detection unit, and a methanol daily tank safety detection unit, etc. The methanol detection unit may control the corresponding sensor to obtain the corresponding methanol detection data. The methanol detection data may include but is not limited to: methanol gas concentration, methanol liquid level, methanol fire data (temperature, flame signal, smoke signal, etc.), methanol daily tank cabin temperature, methanol daily tank cabin pressure, etc., wherein the methanol liquid level may include at least two parts: one is the methanol liquid level indicating methanol liquid leakage collected at the lowest point of the enclosed space on the methanol transportation line, such as the methanol fuel preparation room, the double-walled pipe outer pipe, etc.; the other is the methanol liquid level of the methanol fuel liquid level in the methanol storage tank collected in the methanol daily tank.

[0041] The preset methanol safety policy set can be understood as a pre-configured set of policies for ensuring the safety of methanol-fueled ships. The preset methanol safety policy set may include one or more safety action policies. The preset methanol safety policy set may include but is not limited to: selecting a corresponding safety action set in the methanol safety system logic table according to the data type of the methanol monitoring data, and controlling the methanol actuator to perform the corresponding safety action according to the safety action set, determining the corresponding safety action set when the methanol monitoring data meets the preset conditions, and controlling the methanol actuator to perform the corresponding safety action according to the safety action set, etc.

[0042] Methanol actuators can be understood as equipment used to perform safety actions on methanol fuel ships. Methanol actuators can at least include: methanol safety system main control box, fire alarm main control box, methanol main valve control box, methanol supply unit, host safety module control box, inerting purge system, etc. Safety actions can refer to actions used to control methanol actuators to perform according to safety action strategies. Safety actions can include but are not limited to: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the fire alarm main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank output valve, controlling the methanol main valve control box to cut off the methanol daily tank input valve, controlling the methanol main valve control box to cut off the methanol daily tank delivery pump, cutting off the methanol supply unit, controlling the host safety module control box to cut off the host methanol input main valve, controlling the host safety module control box to stop the host methanol mode, controlling the host safety module control box to switch to fuel mode, controlling the inerting purge system to remove residual methanol in pipelines and equipment, etc.

[0043] Specifically, the methanol detection module 110 in the ship's methanol fuel safety system can control the pre-set methanol detection unit to collect corresponding methanol detection data in real time, such as methanol gas concentration, methanol liquid level, methanol fire alarm data, methanol daily tank cabin temperature, methanol daily tank cabin pressure, etc.; then, the acquired methanol detection data is sent to the main control module 120, and the main control module 120 searches for the corresponding safety action strategy in the pre-configured preset methanol safety strategy set according to the methanol detection data, wherein the method of searching for the corresponding safety action strategy in the preset methanol safety strategy set according to the methanol monitoring data may include but is not limited to the following: selecting the corresponding safety action set in the methanol safety system logic table according to the data type of the methanol monitoring data; determining the corresponding safety action set when the methanol monitoring data meets the preset conditions in the preset methanol safety strategy set, etc.; finally, the safety action execution module 130 controls the corresponding methanol actuator to execute the corresponding safety action according to the determined safety action strategy.

[0044] Further, based on the above-mentioned embodiments of the invention, the methanol detection unit at least includes: a methanol gas detection unit, a methanol liquid detection unit, a methanol fire detection unit and a methanol daily cabin safety detection unit.

[0045] In an embodiment of the present invention, a methanol gas detection unit can be arranged in an enclosed space on a methanol transmission line, such as a methanol fuel preparation room, a double-walled outer pipe, and other areas, for real-time detection of the methanol gas concentration in the air; a methanol liquid detection unit can be arranged in an enclosed space on a methanol transmission line, such as a methanol fuel preparation room, a double-walled outer pipe, and other areas at the lowest point of the well, for real-time collection of the liquid level of the leaked methanol fuel liquid; a methanol fire detection unit can be arranged in an enclosed space on a methanol transmission line, such as a personnel entry and exit area, around a methanol storage tank, and other locations, for real-time monitoring of the methanol fire conditions in various areas; a methanol daily cabin safety detection unit can be configured in a methanol daily cabin, for real-time monitoring of various methanol safety indicators in the methanol daily cabin, such as cabin temperature, cabin pressure, and methanol fuel liquid level in a methanol storage tank.

[0046] Further, based on the above-mentioned embodiment of the invention, controlling the methanol detection unit to collect methanol detection data includes:

[0047] Control the methanol gas detection unit to obtain the methanol gas concentration collected by the methanol gas detection probe;

[0048] Controlling the methanol liquid detection unit to obtain a first liquid level height collected by a methanol liquid leakage float;

[0049] Control the methanol fire detection unit to obtain methanol fire data detected by the fire detector;

[0050] The methanol daily tank safety detection unit is controlled to obtain the second liquid level height, the cabin temperature and the cabin pressure detected by the methanol liquid level detection sensor, the temperature sensor and the pressure sensor.

[0051] The first liquid level may refer to the liquid level of methanol fuel leakage collected by a methanol liquid leakage float in an enclosed space on a methanol delivery line. Methanol fire alarm data may include various data related to fire alarms collected by a fire alarm probe, such as temperature, flame signal, smoke signal, etc. The second liquid level may refer to the liquid level of methanol fuel in a methanol storage tank collected by a methanol liquid level detection sensor in a methanol daily tank. The methanol liquid level detection sensor may include: a high-level float and a high-high-level float in a methanol daily tank, etc.

[0052] In the implementation of the present invention, the following detection units can be set for the ship methanol fuel safety system according to the relevant characteristics of methanol and the usage characteristics of methanol-fueled ships: methanol gas detection unit, methanol liquid detection unit, methanol fire detection unit and methanol daily tank safety detection unit, and according to the actual methanol safety requirements, methanol gas detection probes, methanol liquid leakage floats, fire probes, methanol liquid level detection sensors, temperature sensors, pressure sensors and other sensor devices are pre-installed in the enclosed spaces on the methanol transportation line, methanol daily tanks and other methanol safety monitoring areas. Then, the methanol detection module 110 can respectively control the methanol gas detection unit to obtain the methanol gas concentration collected by the methanol gas detection probe, control the methanol liquid detection unit to obtain the first liquid level collected by the methanol liquid leakage float, control the methanol fire detection unit to obtain the methanol fire data detected by the fire probe, and control the methanol daily tank safety detection unit to obtain the second liquid level, cabin temperature and cabin pressure detected by the methanol liquid level detection sensor, temperature sensor and pressure sensor.

[0053] Further, based on the above-mentioned embodiment of the invention, searching for a corresponding safety action strategy in a preset methanol safety strategy set according to methanol monitoring data includes:

[0054] In the methanol safety system logic table of the preset methanol safety strategy set, the safety action set is determined according to the methanol monitoring data and the preset methanol safety conditions.

[0055] Among them, the methanol safety system logic table can be understood as a logic table pre-configured for the ship's methanol fuel safety system, and the methanol safety system logic table can at least include information such as methanol safety judgment conditions and corresponding safety actions. The preset methanol safety conditions can refer to the pre-configured conditions for judging whether the methanol monitoring data meets the methanol safety requirements. The preset methanol safety conditions may include but are not limited to: methanol gas concentration is greater than or equal to the preset methanol gas concentration threshold, methanol fire alarm data is greater than or equal to the preset fire alarm data threshold, methanol liquid level height is greater than the preset liquid level height threshold, cabin temperature is greater than or equal to the preset temperature threshold, cabin pressure is greater than or equal to the preset pressure threshold, etc.

[0056] In an embodiment of the present invention, the main control module 120 can determine whether the acquired methanol monitoring data meets the preset methanol safety conditions in the pre-configured methanol safety system logic table. If not, the corresponding safety action set is searched in the methanol safety system logic table, wherein the preset methanol safety conditions may include but are not limited to: the methanol gas concentration is greater than or equal to the preset methanol gas concentration threshold, the methanol fire alarm data is greater than or equal to the preset fire alarm data threshold, the methanol liquid level height is greater than the preset liquid level height threshold, the cabin temperature is greater than or equal to the preset temperature threshold, the cabin pressure is greater than or equal to the preset pressure threshold, etc.

[0057] Further, based on the above-mentioned embodiment of the invention, in the methanol safety system logic table of the preset methanol safety strategy set, a safety action set is determined according to the methanol monitoring data and the preset methanol safety conditions, including at least one of the following:

[0058] When the methanol monitoring data meets the requirement that the methanol gas concentration is greater than or equal to the preset methanol gas concentration threshold, the safety action set is determined in the methanol safety system logic table as follows: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank output valve, cutting off the methanol supply unit, and controlling the inerting purge system to remove the residual methanol in the pipeline and equipment;

[0059] When the methanol monitoring data satisfies that the first liquid level height is greater than or equal to the first preset liquid level height threshold, the safety action set is determined in the methanol safety system logic table as follows: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank output valve, cutting off the methanol supply unit, and controlling the inerting purge system to remove residual methanol in the pipeline and equipment;

[0060] When the methanol monitoring data satisfies that the methanol fire alarm data is greater than or equal to the preset fire alarm data threshold, the safety action set is determined in the methanol safety system logic table as follows: control the fire alarm main control box to trigger an alarm prompt, control the methanol main valve control box to cut off the methanol daily cabin output valve, cut off the methanol supply unit, control the host safety module control box to cut off the host methanol input main valve, control the host safety module control box to stop the host methanol mode, control the host safety module control box to switch to the fuel mode, and control the inerting purge system to remove the residual methanol in the pipeline and equipment;

[0061] When the methanol monitoring data satisfies that the second liquid level height is greater than or equal to the second preset liquid level height threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank input valve, and controlling the methanol main valve control box to cut off the methanol daily tank delivery pump;

[0062] When the methanol monitoring data satisfies that the cabin temperature and cabin pressure are respectively greater than or equal to the preset temperature threshold and the preset pressure threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt.

[0063] In an embodiment of the present invention, the inerting purge system may refer to a system for inerting and purging equipment in areas such as methanol daily tanks, methanol users (ship main engines), and methanol supply units, as well as related connecting pipelines. The inerting purge system can be used to remove residual methanol in pipelines and equipment, thereby eliminating the risk of methanol forming a flammable and explosive environment. Further, the inerting purge system can also be used to fill nitrogen into the methanol daily tank to ensure that during the voyage of the ship, when the liquid level in the cabin is shaking, the methanol daily tank is in an inerting environment to avoid the risk of air mixing and explosion. Among them, the so-called inerting refers to reducing the concentration of oxygen in the methanol daily tank by filling nitrogen, thereby avoiding the methanol fuel in the methanol daily tank from catching fire or exploding.

[0064] Furthermore, based on the above-mentioned embodiments of the invention, the methanol actuator includes at least: a methanol safety system main control box, a fire alarm main control box, a methanol main valve control box, a methanol supply unit, a host safety module control box, and an inerting purge system.

[0065] In an embodiment of the present invention, the main control box of the methanol safety system may refer to the main control box of the ship methanol fuel safety system provided in an embodiment of the present invention, which is used to realize the dispatch and control of the safety of methanol fuel for the whole ship. The fire alarm main control box may refer to the main control box related to the methanol fire alarm. At the same time, the fire alarm main control box can also be connected to the fire alarm system of the whole ship. When a methanol fire occurs, it will trigger the fire alarm of the whole ship, and remind the fire alarm main control box and the relevant double-view board as a methanol fire alarm to remind the crew to handle it with caution. The methanol main valve control box may refer to the main control box used to control the methanol daily tank output valve, the methanol daily tank input valve, and the methanol daily tank delivery pump. The main engine safety module control box may refer to the main control box related to the safety of the methanol user (ship main engine).

[0066] Furthermore, based on the above-mentioned embodiment of the invention, the methanol detection module 110 further includes an image acquisition unit, which is used to monitor the safety status of the ship in real time in combination with the methanol fire detection unit.

[0067] In an embodiment of the present invention, the methanol detection module 110 may further include an image acquisition unit, which may be, for example, an image acquisition device such as an infrared camera. The image acquisition unit may be combined with the methanol fire detection unit to monitor the safety status of the ship in real time, and may quickly locate the fire point when a methanol fire occurs, thereby helping personnel to implement fire extinguishing in a targeted manner.

[0068] Furthermore, based on the above-mentioned embodiment of the invention, the methanol detection module 110 also includes a methanol ventilation unit, and the methanol ventilation unit is used to extract methanol escaping from the methanol transmission line.

[0069] In an embodiment of the present invention, since enclosed spaces on the methanol transmission line, such as areas between methanol pumping stations and double-walled pipe outer pipes, must be forced ventilated, the methanol detection module 110 may also include a methanol ventilation unit, which can be used to extract methanol escaping from the methanol transmission line to prevent the occurrence of methanol safety accidents caused by methanol fuel leakage.

[0070] Furthermore, based on the above-mentioned embodiment of the invention, the methanol detection module 110 further includes a gas flow detection unit, and the gas flow detection unit is used to monitor the gas flow on the methanol transmission line.

[0071] In an embodiment of the present invention, the methanol detection module 110 also includes a gas flow detection unit, which can be used to monitor the gas flow on the methanol transmission line in real time, and when the gas flow is lower than a preset flow threshold, control the methanol safety system main control box to trigger an alarm prompt.

[0072] Further, based on the above-mentioned embodiment of the invention, the methanol detection module 110 also includes a manual cut-off button, and the setting area of ​​the manual switch button at least includes: a methanol storage area and a methanol delivery route area.

[0073] In an embodiment of the present invention, the methanol detection module 110 may further include a plurality of manual cut-off buttons, and the setting area of ​​the manual cut-off buttons at least includes: a methanol storage area and a methanol delivery route area. In a specific embodiment, the setting area of ​​the manual cut-off buttons may include but is not limited to: a bottom layer of the cabin, a lower platform of the cabin, an upper platform of the cabin, a centralized control room, outside the door of the methanol fuel preparation room, near the methanol daily cabin, a cab, etc.

[0074] Furthermore, based on the above-mentioned embodiments of the invention, a ship methanol fuel safety system provided by the embodiments of the present invention involves electrical components that are completely independent of other electrical systems, uses dedicated power supplies and dedicated components, and can still safely ensure the safety of the ship's methanol fuel in the event of a power outage on the entire ship, with higher safety and reliability.

[0075] The embodiment of the present invention provides a ship methanol fuel safety system, including: a methanol detection module, a main control module and a safety action execution module, wherein the methanol detection module is used to control the methanol detection unit to collect methanol detection data; the main control module is used to search for corresponding safety action strategies in a preset methanol safety strategy set according to the methanol monitoring data; the safety action execution module is used to control the methanol actuator to execute safety actions according to the safety action strategy. The above ship methanol fuel safety system can accurately detect whether the ship methanol fuel leaks, and take appropriate emergency cut-off measures when the methanol fuel leaks, and timely cut off the leakage source, thereby effectively protecting the safety of personnel and ships.

[0076] Figure 2 FIG. 1 is a schematic diagram of another structural diagram of a ship methanol fuel safety system provided according to an embodiment of the present invention. Figure 2 As shown, according to the relevant characteristics of methanol and the use characteristics of methanol fuel ships, the embodiment of the present invention designs four detection modes: methanol gas detection, methanol liquid detection, methanol fire detection and methanol daily tank safety detection, which are specifically described as follows:

[0077] 1. Methanol gas detection: A dedicated methanol gas leak detection probe is installed in the enclosed space on the methanol transmission line, such as the fuel preparation room A, the outer pipe of the double-walled pipe, etc. to detect the methanol gas concentration in the air, and trigger an alarm and safety action when the methanol gas concentration is greater than or equal to the preset methanol gas concentration threshold.

[0078] 2. Methanol liquid detection: A well is set up at the lowest point of the enclosed space on the methanol transmission line, such as fuel preparation room A, outer pipe of double-walled pipe, etc., and a methanol liquid leakage float is set in the well to collect the liquid level of the leaked methanol fuel liquid. When the liquid level is greater than the preset liquid level threshold, an alarm and safety action are triggered.

[0079] 3. Methanol fire detection: Infrared cameras and fire detectors are installed in enclosed spaces where people enter and exit on the methanol transportation line and around methanol storage tanks. When methanol catches fire, the fire detectors can accurately and promptly detect the fire and trigger alarms and safety actions. At the same time, the infrared camera can capture the fire scene in the first time to help people extinguish the fire.

[0080] 4. Safety detection of methanol daily tank: Methanol liquid level detection sensor, temperature sensor and pressure sensor are respectively installed in the methanol daily tank to monitor the methanol fuel liquid level, temperature and pressure in the methanol storage tank of the methanol daily tank, and trigger alarm and safety action when the above indicators are abnormal.

[0081] The present invention covers a variety of safety actions to ensure that the ship's methanol fuel safety system automatically cuts off related equipment in the event of an accident. In addition, a conspicuous manual cut-off button is provided near the protection area.

[0082] Exemplary safety actions include the following:

[0083] 1. Force ventilation is carried out in enclosed spaces on the methanol transportation line, such as methanol pump station rooms, double-wall pipe outer pipes, etc. When methanol flows through, the ventilation in these areas must be forced to open.

[0084] 2. Cut off the methanol daily tank transfer pump.

[0085] 3. Cut off the methanol supply unit and close the outlet valve of the supply unit.

[0086] 4. Cut off the methanol user (ship main engine) and close the methanol valve group of the methanol user.

[0087] 5. Cut off the inlet and outlet valves of the methanol daily service tank and close the inlet and outlet valves of the methanol daily service tank.

[0088] 6. After nitrogen purging and cutting off related equipment, for example, methanol users (ship main engines) will use nitrogen to purge their methanol pipelines, and purge the remaining methanol in the pipelines back to the methanol daily tank.

[0089] 7. Methanol fire alarm: The methanol fire alarm is connected to the fire alarm system of the entire ship. When a methanol fire occurs, it will trigger the fire alarm of the entire ship, and the fire alarm main control box and related repeater panels will remind that it is a methanol fire, reminding the crew to handle it with caution.

[0090] 8. Certain manual cut-off buttons shall be set in the areas where methanol is stored and transported, so that personnel can manually cut off the methanol equipment in the area when they find safety hazards. The areas where the manual cut-off buttons are set may include but are not limited to: the bottom floor of the cabin, the lower platform of the cabin, the upper platform of the cabin, the control room, outside the door of the methanol fuel preparation room, near the methanol daily cabin, the cab, etc.

[0091] 9. When the methanol user (ship main engine) stops the methanol mode, the ship main engine will immediately switch to fuel mode and will not cause the ship to lose power.

[0092] The methanol safety system logic table involved in the embodiment of the present invention is shown in the following table:

[0093]

[0094]

[0095]

[0096] Furthermore, based on the above-mentioned embodiments of the invention, the protection scenarios involved in the ship methanol fuel safety system provided by the embodiments of the present invention may include the following: ① pipelines and delivery pumps from the methanol cargo tank to the methanol fuel daily tank; ② methanol daily tank; ③ methanol fuel preparation room; ④ engine room methanol fuel double-wall pipe; ⑤ space where methanol users are located; ⑥ methanol delivery pipeline.

[0097] The embodiment of the present invention provides a ship methanol fuel safety system, which can detect in real time and accurately whether methanol fuel leaks during transportation, and take appropriate emergency cut-off measures when methanol fuel leaks, cut off the leakage source in time, and effectively protect the safety of personnel and ships; at the same time, the electrical components involved in the system are completely independent of other electrical systems, and use dedicated power supplies and dedicated components, which can safely ensure the safety of the ship's methanol fuel in the event of a power outage on the entire ship, with higher safety and reliability; not only the investment cost and operating cost are low, but also the carbon emission and sulfur emission of the ship can be reduced.

[0098] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A ship methanol fuel safety system, characterized in that: The system includes: a methanol detection module, a main control module and a safety action execution module; The methanol detection module is used to control the methanol detection unit to collect methanol monitoring data; The main control module is used to search for a corresponding safety action strategy in a preset methanol safety strategy set according to the methanol monitoring data; The safety action execution module is used to control the methanol actuator to execute the safety action according to the safety action strategy; The searching for a corresponding safety action strategy in a preset methanol safety strategy set according to the methanol monitoring data includes: In the methanol safety system logic table of the preset methanol safety strategy set, a safety action set is determined according to the methanol monitoring data and the preset methanol safety conditions; The protection scenarios involved in the ship methanol fuel safety system include the pipelines and delivery pumps from the methanol cargo tank to the methanol fuel daily tank, the methanol daily tank, the methanol fuel preparation room, the double-walled methanol fuel pipe in the engine room, the space where the methanol users are located, and the methanol delivery pipeline; In the methanol safety system logic table of the preset methanol safety strategy set, the safety action set is determined according to the methanol monitoring data and the preset methanol safety conditions, including at least one of the following: When the methanol monitoring data satisfies that the methanol gas concentration is greater than or equal to the preset methanol gas concentration threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank output valve, cutting off the methanol supply unit, and controlling the inerting purge system to remove residual methanol in the pipeline and equipment; When the methanol monitoring data satisfies that the first liquid level height is greater than or equal to the first preset liquid level height threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank output valve, cutting off the methanol supply unit, and controlling the inerting purge system to remove residual methanol in the pipeline and equipment; When the methanol monitoring data satisfies that the methanol fire alarm data is greater than or equal to the preset fire alarm data threshold, the safety action set is determined in the methanol safety system logic table as: controlling the fire alarm main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily cabin output valve, cutting off the methanol supply unit, controlling the host safety module control box to cut off the host methanol input main valve, controlling the host safety module control box to stop the host methanol mode, controlling the host safety module control box to switch to the fuel mode, and controlling the inerting purge system to remove the residual methanol in the pipeline and equipment; When the methanol monitoring data satisfies that the second liquid level height is greater than or equal to the second preset liquid level height threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt, controlling the methanol main valve control box to cut off the methanol daily tank input valve, and controlling the methanol main valve control box to cut off the methanol daily tank delivery pump; When the methanol monitoring data satisfies that the cabin temperature and cabin pressure are respectively greater than or equal to the preset temperature threshold and the preset pressure threshold, the safety action set is determined in the methanol safety system logic table as: controlling the methanol safety system main control box to trigger an alarm prompt; The first liquid level is the liquid level of the methanol fuel leakage liquid collected by the methanol liquid leakage float in the enclosed space on the methanol transmission line; the second liquid level is the liquid level of the methanol fuel in the methanol storage tank collected by the methanol liquid level detection sensor in the methanol daily tank; The electrical components of the ship methanol fuel safety system belong to an independent electrical system, using a dedicated power supply and dedicated components.

2. The system according to claim 1, characterized in that The methanol detection unit at least includes: a methanol gas detection unit, a methanol liquid detection unit, a methanol fire detection unit and a methanol daily cabin safety detection unit. The control of the methanol detection unit to collect methanol monitoring data includes: Controlling the methanol gas detection unit to obtain the methanol gas concentration collected by the methanol gas detection probe; Controlling the methanol liquid detection unit to obtain a first liquid level height collected by a methanol liquid leakage float; Controlling the methanol fire detection unit to obtain methanol fire data detected by the fire alarm probe; The methanol daily tank safety detection unit is controlled to obtain the second liquid level height, the cabin temperature and the cabin pressure detected by the methanol liquid level detection sensor, the temperature sensor and the pressure sensor.

3. The system according to claim 1, characterized in that The step of controlling the methanol actuator to perform the safety action according to the safety action strategy includes: According to the safety action set in the safety action strategy, the corresponding methanol actuator is controlled to execute the safety action set.

4. The system according to claim 1, characterized in that The methanol actuator at least includes: a methanol safety system main control box, a fire alarm main control box, a methanol main valve control box, a methanol supply unit, a host safety module control box, and an inerting purge system.

5. The system according to claim 1, characterized in that The methanol detection module also includes an image acquisition unit, which is used to monitor the safety status of the ship in real time in combination with the methanol fire detection unit.

6. The system according to claim 1, characterized in that The methanol detection module also includes a methanol ventilation unit, which is used to extract methanol escaping from the methanol transmission line.

7. The system according to claim 1, characterized in that The methanol detection module also includes a gas flow detection unit, which is used to monitor the gas flow on the methanol transmission line.

8. The system according to claim 1, characterized in that The methanol detection module also includes a manual cut-off button, and the setting area of ​​the manual cut-off button at least includes: a methanol storage area and a methanol delivery route area.

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