A temperature monitoring system for gaseous fuel supply

Abstract

The application provides a temperature monitoring system for gas fuel supply, comprising a liquid storage module, a temperature monitoring module and a temperature control module; the liquid storage module comprises a liquid storage unit, the liquid storage unit is provided with a first storage space and a second storage space, the first storage space stores liquefied natural gas, the first storage space is communicated with the second storage space through a pipeline, and the pipeline is provided with a gasification valve; the temperature monitoring module comprises a first temperature probe, and the first temperature probe is used for monitoring the temperature of the liquefied natural gas in the first storage space; the temperature control module is used for receiving the temperature signal of the first temperature probe; when the temperature of the liquefied natural gas is higher than a first preset temperature, the gasification valve is opened, so that the liquefied natural gas in the first storage space enters the second storage space through the gasification valve; and when the temperature of the liquefied natural gas is lower than the first preset temperature, the gasification valve is closed. The application aims to provide a temperature monitoring system which can ensure that the temperature of liquefied natural gas is kept below the boiling point, so that the liquefied natural gas is maintained in a liquid state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquefied natural gas, in particular to a temperature monitoring system for gas fuel supply. BACKGROUND

[0002] Liquefied natural gas (LNG) power ships are increasingly used in water transportation as a kind of low-emission, high-automation and high-value-added ships.

[0003] Liquefied natural gas is a liquid obtained by compressing and cooling natural gas to its boiling point temperature. Due to the special physicochemical properties of liquefied natural gas fuel, it needs to be stored and supplied in a low-temperature (below its boiling point) environment. If the storage temperature exceeds the boiling point, the liquefied natural gas will rapidly evaporate into a gaseous state, causing the pressure in the storage tank to rise, which may cause the liquefied natural gas to be discharged from the overflow pipe or safety valve, resulting in energy loss and environmental pollution, and even causing the storage tank to rupture, leading to liquefied natural gas leakage and forming a flammable and explosive vapor cloud. Once it meets an open flame or high temperature, it will cause a fire or explosion.

[0004] Therefore, it is necessary to monitor and control the temperature of the gas fuel supply system of the liquefied natural gas power ship to ensure that the liquefied natural gas storage temperature is below the boiling point, so that it remains in a liquid state. However, due to the immaturity of the technology of using liquefied natural gas as fuel in the field of ships, the temperature monitoring technology of the gas fuel supply system of the liquefied natural gas power ship is lacking, making it difficult to achieve safe and reliable liquefied natural gas fuel supply, resulting in a high risk of ship transportation or navigation. Therefore, it is necessary to propose a temperature monitoring system that can monitor and control the temperature of the gas fuel supply system of the liquefied natural gas power ship to ensure that the liquefied natural gas temperature is below the boiling point, so that it remains in a liquid state. SUMMARY

[0005] The main purpose of the present application is to provide a temperature monitoring system that can monitor and control the temperature of the gas fuel supply system of the liquefied natural gas power ship.

[0006] To achieve the above purpose, the temperature monitoring system for gas fuel supply according to the present application comprises a liquid storage module, a temperature monitoring module and a temperature control module.

[0007] The liquid storage module comprises at least one liquid storage unit, the liquid storage unit is provided with a first storage space and a second storage space, the first storage space is used for storing liquefied natural gas, the first storage space and the second storage space are communicated through a pipeline, and the pipeline is provided with a gasification valve.

[0008] The temperature monitoring module comprises a first temperature probe arranged in the first storage space, and the first temperature probe is used for monitoring the temperature of the liquefied natural gas in the first storage space.

[0009] The temperature control module is connected with the gasification valve and the temperature monitoring module respectively, and the temperature control module is used for:

[0010] receiving the temperature signal of the first temperature probe;

[0011] opening the gasification valve when the temperature of the liquefied natural gas is higher than the first preset temperature, so that the liquefied natural gas in the first storage space is gasified through the gasification valve and then enters the second storage space;

[0012] closing the gasification valve to cut off the pipeline when the temperature of the liquefied natural gas is lower than the first preset temperature.

[0013] Preferably, a cooling device is arranged in the first storage space, the cooling device is used for heat exchange with the liquefied natural gas stored in the first storage space to reduce the temperature of the liquefied natural gas, and the temperature control module is connected with the cooling device, and is used for controlling the cooling device to be opened when the temperature of the liquefied natural gas is higher than the first preset temperature, and controlling the cooling device to be closed when the temperature of the liquefied natural gas is lower than the first preset temperature.

[0014] Preferably, the temperature control module is further provided with a pressure monitoring device, and the temperature control module is further used for monitoring the internal pressure of the first storage space and calculating the first preset temperature according to the pressure value;

[0015] The calculation formula is: T=T1-(P1-P2)×S;

[0016] Wherein, T is the first preset temperature, T1 is the boiling point of liquefied natural gas under one standard atmospheric pressure, P1 is one standard atmospheric pressure, P2 is the monitoring pressure, and S is the change gradient of the boiling temperature of liquefied natural gas with the vapor pressure.

[0017] Preferably, the temperature monitoring system for gaseous fuel supply further comprises a vaporizer, the vaporizer comprises a water storage tank and a coil pipe, a main body of the coil pipe is arranged in the water storage tank, one end of the coil pipe is a liquid inlet, the liquid inlet is communicated with the first storage space to receive the liquefied natural gas delivered by the first storage space, the other end of the coil pipe is a gas outlet, the gas outlet is communicated with an external gas delivery pipe, and a heater is arranged in the water storage tank.

[0018] Preferably, the temperature monitoring module further comprises a second temperature probe for monitoring the temperature of the gasified natural gas at the gas outlet, and the temperature control module is further configured to receive a temperature signal transmitted by the second temperature probe, and to turn on the heater when the temperature of the gasified natural gas is lower than a second preset temperature, and to turn off the heater when the temperature of the gasified natural gas is higher than the second preset temperature.

[0019] Preferably, the first storage space is further provided with a stirring device for driving the liquefied natural gas stored in the first storage space to flow.

[0020] Preferably, the liquid storage unit is a liquid storage tank, which comprises an inner tank body and an outer tank body surrounding the inner tank body, the inner tank body forms a containing space, and the containing space is provided with a partition plate, which divides the containing space into the first storage space and the second storage space.

[0021] Preferably, a heat insulation space for containing heat insulation powder is formed between the inner tank body and the outer tank body, and a plurality of support units are arranged in the heat insulation space, each of the support units comprises a hollow support pipe and a connecting piece, one end of the support pipe is connected with the inner tank body, the other end of the support pipe is connected with the outer tank body, the connecting piece is located in the inner tank body and extends along the axial direction of the support pipe, one end of the connecting piece is connected with the inner tank body, and the other end of the connecting piece is connected with the outer tank body.

[0022] Preferably, a plurality of partition components are further arranged in the heat insulation space, and each of the partition components is arranged in sequence along the height direction of the first storage space to divide the heat insulation space into a plurality of horizontal layers, and the heat insulation powder is filled between each of the horizontal layers.

[0023] Preferably, the temperature monitoring system for gaseous fuel supply further comprises a display module connected with the temperature monitoring module, the display module is configured to receive and display the data transmitted by the temperature monitoring module, and the display module is arranged in the main control room of the ship.

[0024] In summary, the temperature monitoring system for gaseous fuel supply is provided, the first temperature probe is used to monitor the temperature of the liquefied natural gas in the first storage space, the second storage space and the gasification valve are arranged, the gasification valve is turned on when the temperature of the liquefied natural gas is higher than the first preset temperature, the liquefied natural gas in the first storage space is gasified through the gasification valve, and the liquefied natural gas absorbs heat during the gasification process, so that the temperature of the liquefied natural gas in the first storage space decreases until the temperature of the liquefied natural gas is lower than the first preset temperature (the boiling point temperature of the liquefied natural gas), so as to ensure that the temperature of the liquefied natural gas is kept below the boiling point, and the liquefied natural gas is maintained in a liquid state.

[0025] The gasification valve is then closed to cut off the pipeline, preventing the temperature of the liquefied natural gas from continuing to drop. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on the drawings shown.

[0027] Figure 1 The structural block diagram of an embodiment of the temperature monitoring system for gas fuel supply of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1 - liquid storage unit; 11 - first storage space; 12 - second storage space; 13 - gasification valve; 14 - cooling device; 2 - first temperature probe; 3 - temperature control module; 4 - vaporizer; 5 - second temperature probe; 6 - external gas delivery pipe.

[0030] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application.

[0032] The present application proposes a temperature monitoring system for gas fuel supply which ensures that the temperature of liquefied natural gas is kept below the boiling point, so that it is maintained in a liquid state.

[0033] Please refer to Figure 1 The temperature monitoring system for gas fuel supply proposed by the present application comprises a liquid storage module, a temperature monitoring module and a temperature control module 3.

[0034] The liquid storage module comprises at least one liquid storage unit 1, which is provided with a first storage space 11 and a second storage space 12. The first storage space 11 is used to store liquefied natural gas, and the first storage space 11 and the second storage space 12 are in communication through a pipeline. The pipeline is provided with a gasification valve 13.

[0035] The temperature monitoring module comprises a first temperature probe 2 arranged in the first storage space 11, which is used for monitoring the temperature of liquefied natural gas in the first storage space 11.

[0036] The temperature control module 3 is connected with the gasification valve 13 and the temperature monitoring module respectively, and is used for:

[0037] receiving the temperature signal of the first temperature probe 2;

[0038] opening the gasification valve 13 when the temperature of liquefied natural gas is higher than the first preset temperature, so that the liquefied natural gas in the first storage space 11 is gasified through the gasification valve 13 and then enters the second storage space 12;

[0039] closing the gasification valve 13 to cut off the pipeline when the temperature of liquefied natural gas is lower than the first preset temperature.

[0040] In the embodiment, the liquid storage module further comprises a residual gas treatment device, which is in internal communication with the second storage space 12 and is used for treating the gasified natural gas stored in the second storage space 12.

[0041] In a preferred embodiment, the residual gas treatment device is a reliquefaction device or a flare, and the residual gas treatment device is connected with the top of the second storage space 12.

[0042] In summary, the temperature monitoring system for gaseous fuel supply is provided, the first temperature probe 2 is used for monitoring the temperature of liquefied natural gas in the first storage space 11, the second storage space 12 and the gasification valve 13 are arranged, the gasification valve 13 is opened when the temperature of liquefied natural gas is higher than the first preset temperature, the liquefied natural gas in the first storage space 11 is gasified through the gasification valve 13, heat is absorbed during the gasification of liquefied natural gas, so that the temperature of liquefied natural gas in the first storage space 11 is lowered until the temperature of liquefied natural gas is lower than the first preset temperature (boiling point temperature of liquefied natural gas), so that the temperature of liquefied natural gas is kept below the boiling point, and the liquefied natural gas is maintained in a liquid state.

[0043] Then, the gasification valve 13 is closed to cut off the pipeline, so as to avoid the continuous decrease of the temperature of liquefied natural gas.

[0044] Preferably, the first storage space 11 is provided with a cooling device 14 for exchanging heat with the liquefied natural gas stored in the first storage space 11 to lower the temperature of the liquefied natural gas, and the temperature control module 3 is connected to the cooling device 14 to control the cooling device 14 to be turned on when the temperature of the liquefied natural gas is higher than the first preset temperature and to be turned off when the temperature of the liquefied natural gas is lower than the first preset temperature. By providing the cooling device 14, the temperature of the liquefied natural gas in the first storage space 11 is further ensured to be below the boiling point. In this embodiment, the cooling device 14 comprises a refrigerant storage tank provided with a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is used to receive external refrigerant, and the refrigerant outlet is used to discharge the refrigerant in the refrigerant storage tank.

[0045] In a preferred embodiment, the cooling device 14 is a liquid nitrogen cooling device 14, and the refrigerant storage tank is a liquid nitrogen storage tank.

[0046] Preferably, the temperature control module 3 is further provided with a pressure monitoring device, and the temperature control module 3 is further used to monitor the pressure inside the first storage space 11 and calculate the first preset temperature according to the pressure value;

[0047] The calculation formula is: T=T1-(P1-P2)×S;

[0048] Wherein, T is the first preset temperature, T1 is the boiling point of the liquefied natural gas under one standard atmospheric pressure, P1 is one standard atmospheric pressure, P2 is the monitored pressure, and S is the gradient of the change of the boiling temperature of the liquefied natural gas with the vapor pressure. Under different pressure environments, the boiling point of the liquefied natural gas is different, and during the working process, the storage of the liquefied natural gas in the first storage space 11 will change, resulting in the change of the pressure in the first storage space 11, so the first preset temperature needs to be calculated to ensure that the liquefied natural gas in the first storage space 11 will not be gasified; in this embodiment, S=1.25×10 -4 ℃ / Pa, and T1=161.5℃.

[0049] In a preferred embodiment, T=T1-(P1-P2)×S-T2, wherein T2 is a temperature preset allowance, and 0.5≤T2≤2.

[0050] Preferably, the temperature monitoring system for gas fuel supply further comprises a vaporizer 4, the vaporizer 4 comprises a water storage tank and a coil pipe, a main body of the coil pipe is arranged in the water storage tank, one end of the coil pipe is a liquid inlet, the liquid inlet is communicated with the first storage space 11 to receive the liquefied natural gas delivered by the first storage space 11, the other end of the coil pipe is a gas outlet, the gas outlet is communicated with the external gas delivery pipe 6, and a heater is arranged in the water storage tank. By arranging the vaporizer 4, the liquefied natural gas is heated to restore it to gaseous natural gas, facilitating use and distribution.

[0051] In the embodiment, a circulating device is further arranged in the water storage tank, and the circulating device is used to drive the water in the water storage tank to circulate when the liquefied natural gas is fastened to the coil pipe. When the liquefied natural gas passes through the coil pipe, the water in the water storage tank exchanges heat with the outer wall of the coil pipe to heat the liquefied natural gas, and the temperature of the water decreases. The closer the water is to the outer wall of the coil pipe, the faster the temperature of the water decreases. This results in low heat exchange efficiency and easy icing of the outer wall of the coil pipe. By arranging the circulating device, the water in the water storage tank is driven to circulate to uniformly distribute the temperature of the water in the water storage tank, which can improve the heat exchange efficiency between the water and the outer wall of the coil pipe and avoid icing of the outer wall of the coil pipe.

[0052] Preferably, the temperature monitoring module further comprises a second temperature probe 5, the second temperature probe 5 is used to monitor the temperature of the gaseous natural gas at the gas outlet, and the temperature control module 3 is further used to receive the temperature signal transmitted by the second temperature probe 5 to start the heater when the temperature of the gaseous natural gas is lower than a second preset temperature and to stop the heater when the temperature of the gaseous natural gas is higher than the second preset temperature. By arranging the second temperature probe 5 and the heater, the liquefied natural gas is heated to a temperature suitable for engine combustion or pipeline transportation. In the embodiment, the second preset temperature is any integer temperature in the range of 5℃ to 10℃.

[0053] Preferably, a stirring device is further arranged in the first storage space 11, and the stirring device is used to drive the liquefied natural gas stored in the first storage space 11 to flow. The liquefied natural gas is obtained by liquefying different components of gas at low temperature, and the liquefaction temperature and density of different components are different. Therefore, during storage or transportation, the phenomenon that the liquid with large density sinks to the bottom and the liquid with small density floats to the top may occur. The stratification of the liquefied natural gas causes changes in the pressure and temperature in the storage tank, which causes the temperature value monitored by the first temperature probe to be inconsistent with the actual temperature of the liquefied natural gas and the value monitored by the pressure monitoring device to be inconsistent with the pressure in the first storage space 11, affecting the operation of the system. By arranging the stirring device, the liquefied natural gas in the first storage space 11 is stirred uniformly to avoid stratification of the liquefied natural gas and occurrence of the above-mentioned situations.

[0054] In the embodiment, the first temperature probe 2 is provided in plurality, each first temperature probe 2 is arranged along the height of the inner tank body in sequence, the temperature monitoring module further comprises a data processor and a plurality of density probes, each density probe is arranged along the height of the inner tank body in sequence, the temperature monitoring module is connected with the stirring device, and the temperature monitoring module is used for:

[0055] Periodically or in real time, temperature data and density data of the liquefied natural gas in the first storage space 11 are collected and transmitted to the data processor;

[0056] The data processor analyzes the temperature data and density data of the liquefied natural gas in the first storage space 11, and judges whether the liquefied natural gas in the first storage space 11 is stratified according to the change trend, amplitude and distribution of the temperature data and density data.

[0057] If it is judged that the liquefied natural gas in the tank is stratified, the stirring device is started to stir for a preset time.

[0058] In another embodiment, the temperature monitoring system for gaseous fuel supply further comprises a stratification detection module, the stratification detection module comprises an optical fiber sensor, a laser generator and a spectrometer;

[0059] The optical fiber sensor is arranged in the first storage space 11, one end of the optical fiber sensor is connected with the laser generator, and the other end of the optical fiber sensor is connected with the spectrometer;

[0060] The stratification detection module is used for: the laser generator sends one or more lasers to the optical fiber sensor, so that the laser is reflected inside the optical fiber sensor and produces Raman scattering with the liquefied natural gas in the first storage space 11;

[0061] The spectrometer receives and analyzes the Raman scattering spectrum reflected from the optical fiber sensor, and judges whether the liquefied natural gas in the tank is stratified, and the degree and position of stratification according to the intensity and wavelength change of the Raman scattering spectrum.

[0062] Preferably, the liquid storage unit 1 is a liquid storage tank, the liquid storage tank comprises an inner tank body and an outer tank body surrounding the inner tank body, the inner tank body surrounds to form a containing space, the containing space is provided with a partition plate, and the partition plate separates the containing space into the first storage space 11 and the second storage space 12. In another embodiment, the liquid storage unit 1 comprises a main tank and a standby tank, the main tank comprises an inner tank body and an outer tank body, the inner tank body surrounds to form a first storage space 11, and the standby tank surrounds to form the second storage space 12.

[0063] Preferably, a heat insulation space for accommodating heat insulation powder is formed between the inner tank body and the outer tank body, and a plurality of support units are arranged in the heat insulation space, each of the support units comprising a hollow support pipe and a connecting piece, one end of the support pipe being connected with the inner tank body, the other end of the support pipe being connected with the outer tank body, the connecting piece being arranged inside the support pipe and extending along the axial direction of the support pipe, one end of the connecting piece being connected with the inner tank body, the other end of the connecting piece being connected with the outer tank body. By filling the heat insulation space with heat insulation powder (for example, pearlite), heat exchange between the liquefied natural gas stored in the first storage space 11 and the external environment can be well insulated, and the low-temperature environment inside the first storage space 11 can be maintained; by arranging the support pipe and the connecting piece, the connection stability between the inner tank body and the outer tank body can be improved, and the structural strength of the first storage space 11 can be enhanced. In the embodiment, the connecting piece has a cross-shaped (cross-shaped or X-shaped) or triangular cross section.

[0064] Preferably, a plurality of partition components are further arranged in the heat insulation space, and each of the partition components is arranged in sequence along the height direction of the first storage space 11 to divide the heat insulation space into a plurality of horizontal layers, and the heat insulation powder is filled in each of the horizontal layers. Since there are gaps between the heat insulation powders, the first storage space 11 will vibrate with the movement of the ship during the operation of the ship, and at the same time, the heat insulation powder in the heat insulation space will gradually deposit under the action of gravity, which may cause the upper layer of the heat insulation powder in the heat insulation space to have a hollow, resulting in poor heat insulation effect. By arranging the partition components, the heat insulation powder is divided into multiple layers and the flow of the powder between the layers is limited, so that the above-mentioned defects can be avoided.

[0065] Preferably, the temperature monitoring system for the gas fuel supply further comprises a display module, the display module being connected with the temperature monitoring module, the display module being configured to receive and display the data transmitted by the temperature monitoring module, and the display module being arranged in the main control room of the ship. By arranging the display module, the staff on the ship can conveniently check the temperature of the fuel supply system in real time.

[0066] The above merely describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made according to the content of the specification and drawings of the present application, or direct / indirect application in other related technical fields within the concept of the present application is included in the patent protection scope of the present application.

Claims

1. A temperature monitoring system for gaseous fuel supply, characterized by, The device comprises a liquid storage module, a temperature monitoring module and a temperature control module. The liquid storage module comprises at least one liquid storage unit, which is provided with a first storage space and a second storage space, the first storage space is used for storing liquefied natural gas, the first storage space and the second storage space are communicated through a pipeline, and the pipeline is provided with a gasification valve. The temperature monitoring module comprises a first temperature probe arranged in the first storage space, which is used for monitoring the temperature of the liquefied natural gas in the first storage space. The temperature control module is connected with the gasification valve and the temperature monitoring module respectively, and is used for: receiving the temperature signal of the first temperature probe; opening the gasification valve when the temperature of the liquefied natural gas is higher than a first preset temperature, so that the liquefied natural gas in the first storage space is gasified through the gasification valve and then enters the second storage space; closing the gasification valve to cut off the pipeline when the temperature of the liquefied natural gas is lower than the first preset temperature; The first storage space is provided with a cooling device, which is used for heat exchange with the liquefied natural gas stored in the first storage space to reduce the temperature of the liquefied natural gas, the temperature control module is connected with the cooling device, and is used for controlling the cooling device to be opened when the temperature of the liquefied natural gas is higher than the first preset temperature, and controlling the cooling device to be closed when the temperature of the liquefied natural gas is lower than the first preset temperature; the cooling device comprises a refrigerant storage tank, the refrigerant storage tank is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is used for receiving external refrigerant, and the refrigerant outlet is used for discharging the refrigerant in the refrigerant storage tank; The temperature control module is also provided with a pressure monitoring device, and the temperature control module is also used for monitoring the internal pressure of the first storage space and calculating the first preset temperature according to the pressure value; The calculation formula is: ; Wherein, T is the first preset temperature, T1 is the boiling point of liquefied natural gas under one standard atmospheric pressure, P1 is one standard atmospheric pressure, P2 is the monitoring pressure, and S is the gradient of the boiling temperature of liquefied natural gas with the change of vapor pressure.

2. The temperature monitoring system for gaseous fuel supply of claim 1, wherein, It also comprises a vaporizer, the vaporizer comprises a water storage tank and a coil, the main body of the coil is arranged in the water storage tank, one end of the coil is a liquid inlet, the liquid inlet is communicated with the first storage space to receive the liquefied natural gas delivered by the first storage space, the other end of the coil is a gas outlet, the gas outlet is communicated with an external gas delivery pipe, and the water storage tank is provided with a heater.

3. The temperature monitoring system for gaseous fuel supply of claim 2, wherein, The temperature monitoring module further comprises a second temperature probe for monitoring the temperature of the gasified natural gas at the gas outlet, and the temperature control module further receives the temperature signal transmitted by the second temperature probe to open the heater when the temperature of the gasified natural gas is lower than a second preset temperature, and to close the heater when the temperature of the gasified natural gas is higher than the second preset temperature.

4. The temperature monitoring system for gaseous fuel supply of claim 1, wherein, The first storage space is also provided with a stirring device, which is used for driving the liquefied natural gas stored in the first storage space to flow.

5. The temperature monitoring system for gaseous fuel supply of claim 1, wherein, The liquid storage unit is a liquid storage tank, which comprises an inner tank body and an outer tank body enclosing outside the inner tank body, the inner tank body encloses a containing space, the containing space is provided with a partition plate, the partition plate separates the containing space into the first storage space and the second storage space.

6. The temperature monitoring system for gaseous fuel supply of claim 5, wherein, A heat insulation space for containing heat insulation powder is formed between the inner tank body and the outer tank body, a plurality of support units are arranged in the heat insulation space, each support unit comprises a hollow support pipe and a connecting piece, one end of the support pipe is connected with the inner tank body, the other end of the support pipe is connected with the outer tank body, the connecting piece is located in the inside of the support pipe and extends along the axial direction of the support pipe, one end of the connecting piece is connected with the inner tank body, and the other end of the connecting piece is connected with the outer tank body.

7. The temperature monitoring system for gaseous fuel supply of claim 6, wherein, A plurality of partition components are also arranged in the heat insulation space, each partition component is arranged in sequence along the height direction of the first storage space to separate the heat insulation space into a plurality of horizontal layers, and the heat insulation powder is filled between each horizontal layer.

8. The temperature monitoring system for gaseous fuel supply of any one of claims 1-7, wherein, The display module is also included, which is connected with the temperature monitoring module, the display module is used for receiving and displaying the data transmitted by the temperature monitoring module, and the display module is arranged in the main control room of the ship.

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