BOG low-carbon comprehensive utilization system

Abstract

The utility model belongs to BOG utilization technical field relates to a kind of BOG low-carbon comprehensive utilization system, including BOG storage tank, outside pipeline, hydrogen production unit, hydrogen storage tank, carbon dioxide storage tank, helium extraction unit and BOG comprehensive distribution unit;The BOG storage tank is communicated with outside pipeline, hydrogen production unit and helium extraction unit respectively;The hydrogen production unit is also communicated with hydrogen storage tank and carbon dioxide storage tank respectively;The BOG comprehensive distribution unit is also communicated with hydrogen storage tank, carbon dioxide storage tank and helium extraction unit respectively;The hydrogen storage tank is also communicated with outside pipeline.The BOG low-carbon comprehensive utilization system of the utility model realizes the multiple utilization way of BOG gas, reduces carbon emission, expands the utilization range of BOG, and improves utilization degree.

Description

Technical Field

[0001] This utility model belongs to the field of BOG utilization technology and relates to a BOG low-carbon comprehensive utilization system. Background Technology

[0002] Boil-off gas (BOG) is a gas produced during the storage and transportation of liquefied natural gas (LNG) due to evaporation caused by heat transfer. Specifically: BOG in LNG storage tanks is primarily caused by the evaporation of LNG due to external heat transfer during daily storage. Additionally, pressure changes, liquid impact, or flash evaporation during loading and unloading can also lead to BOG production. BOG generated by LNG transport equipment (such as tank trucks) is mainly due to natural evaporation; insufficient vacuum or inadequate insulation in the tank trucks will increase BOG production. The main component of BOG is methane (CH4), with small amounts of ethane, propane, and other heavy hydrocarbons, as well as nitrogen. If released into the atmosphere, its greenhouse effect is 21 times that of carbon dioxide; therefore, BOG requires treatment in actual production.

[0003] In existing technologies, BOG (Boiled Gas) is processed by first heating it in a BOG heater via a vent valve, then storing it in a BOG storage tank for further processing. Referring to patent CN211667587U, a low-carbon comprehensive utilization system for BOG from liquefied natural gas storage tanks utilizes the BOG flashed from the top of the liquefied natural gas storage tank as a cold source in a natural gas pre-cooling heat exchanger, pre-cooling the natural gas to 2-5°C. After pre-cooling and purification, the natural gas enters a cold box for deep cooling to obtain LNG. The BOG after heat exchange is regenerated and further used as fuel for a gas generator, enabling the unit to generate its own electricity. While existing technologies can utilize BOG, they primarily use it as a heat exchange medium and fuel for power generation, limiting its scope and efficiency. This not only wastes resources but also fails to meet the requirements of green and low-carbon development. Utility Model Content

[0004] In view of the technical problems of limited utilization scope and low utilization level of existing BOG utilization, which leads to resource waste and does not meet the requirements of green and low-carbon development, this utility model provides a BOG low-carbon comprehensive utilization system.

[0005] This utility model's BOG low-carbon comprehensive utilization system includes a BOG storage tank, an external transmission pipeline, a hydrogen production unit, a hydrogen storage tank, a carbon dioxide storage tank, a helium extraction unit, and a BOG comprehensive distribution unit; it realizes multiple low-carbon utilization pathways for BOG gas, reduces carbon emissions, expands the scope of BOG utilization, and improves the utilization level.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A low-carbon integrated utilization system for BOG includes a BOG storage tank, an external pipeline, a hydrogen production unit, a hydrogen storage tank, a carbon dioxide storage tank, a helium extraction unit, and a BOG integrated distribution unit.

[0008] The BOG storage tank is connected to the external transmission pipeline, the hydrogen production unit, and the helium extraction unit, respectively; the hydrogen production unit is also connected to the hydrogen storage tank and the carbon dioxide storage tank, respectively; the BOG integrated distribution unit is also connected to the hydrogen storage tank, the carbon dioxide storage tank, and the helium extraction unit, respectively; the hydrogen storage tank is also connected to the external transmission pipeline.

[0009] Further specifying, the hydrogen production unit includes a methane reforming hydrogen production mechanism; the BOG storage tank is connected to a hydrogen storage tank and a carbon dioxide storage tank respectively via the methane reforming hydrogen production mechanism.

[0010] Further specifying, the hydrogen production unit also includes a methane pyrolysis hydrogen production unit running parallel to the methane reforming hydrogen production unit; the BOG storage tank is connected to the hydrogen storage tank via the methane pyrolysis hydrogen production unit; and the methane pyrolysis hydrogen production unit is also connected to the BOG integrated distribution unit.

[0011] Furthermore, a ground source heat pump is installed between the methane pyrolysis hydrogen production unit and the BOG integrated distribution unit.

[0012] Furthermore, the BOG low-carbon integrated utilization system also includes a fuel cell module disposed between the hydrogen storage tank and the BOG integrated distribution unit; the fuel cell module is also connected to the BOG integrated distribution unit via a ground source heat pump.

[0013] Furthermore, the BOG low-carbon integrated utilization system also includes a hydrogen supply station running parallel to the fuel cell module; the hydrogen storage tank is connected to the BOG integrated distribution unit via the hydrogen supply station.

[0014] Furthermore, the BOG low-carbon integrated utilization system also includes a carbon dioxide supply station located between the carbon dioxide storage tank and the BOG integrated distribution unit.

[0015] Furthermore, the BOG low-carbon integrated utilization system also includes a helium compressor located between the BOG integrated distribution unit and the helium extraction unit.

[0016] Furthermore, the BOG low-carbon integrated utilization system also includes an LNG storage tank and a BOG loading and unloading vehicle, which are respectively connected to the BOG storage tank.

[0017] Furthermore, the BOG low-carbon integrated utilization system also includes a compressor installed on the external transmission pipeline.

[0018] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0019] 1. This utility model forms a low-carbon comprehensive utilization system for BOG (Borosilicate Gas) through a BOG storage tank, an external pipeline, a hydrogen production unit, a hydrogen storage tank, a carbon dioxide storage tank, a helium extraction unit, and a BOG integrated distribution unit. It enables direct and / or indirect utilization of BOG, allowing it to be used in multiple ways as a feedstock for methane-to-hydrogen production, hydrogen fuel cells, hydrogen supply, carbon dioxide, and helium, thereby reducing carbon emissions, expanding the scope of BOG utilization, improving the utilization rate of BOG, and meeting the requirements of low-carbon utilization.

[0020] 2. In this utility model, by setting up a pyrolysis hydrogen production mechanism and a reforming hydrogen production mechanism, the deep processing of BOG gas to produce hydrogen is achieved by using different methods, so that it is converted into hydrogen and carbon dioxide, and then the hydrogen and carbon dioxide are reused to reduce carbon emissions and realize the indirect low-carbon utilization of BOG gas.

[0021] 3. In this utility model, hydrogen produced by hydrogen production is collected and stored by setting up a hydrogen storage tank, and then transported to the fuel cell module and the hydrogen supply station respectively, so as to realize different utilization paths of hydrogen and avoid the problem of system instability caused by directly transporting hydrogen to the BOG integrated distribution unit.

[0022] 4. In this utility model, by setting up LNG storage tanks and BOG loading and unloading vehicles, BOG generated at different stages of liquefied natural gas (LNG) storage and transportation can be utilized, avoiding resource waste, further improving the utilization rate of BOG gas, and meeting the environmental protection requirements of green and low-carbon development. Attached Figure Description

[0023] Figure 1 Schematic diagram of BOG low-carbon comprehensive utilization system;

[0024] Figure 2 Schematic diagram of a methane reforming hydrogen production mechanism;

[0025] Figure 3 Schematic diagram of a helium refining mechanism;

[0026] in:

[0027] 1—LNG storage tank; 2—BOG loading and unloading vehicle; 3—BOG storage tank; 4—compressor; 5—methane pyrolysis hydrogen production unit; 6—methane reforming hydrogen production unit; 601—purification tower; 602—pre-conversion tower; 603—first-stage conversion tower; 604—pressure swing adsorption tower; 7—hydrogen storage tank; 8—hydrogen tanker truck; 9—fuel cell module; 10—hydrogen supply station; 11—ground source heat pump; 12—carbon dioxide storage tank; 13—carbon dioxide tanker truck; 14—carbon dioxide supply station; 15—helium extraction unit; 1501—catalytic dehydrogenation unit; 1502—membrane separation unit; 1503—pressure swing adsorption unit; 1504—helium purification unit; 16—helium compressor; 17—BOG integrated distribution unit;

[0028] 100—Export pipeline; 200—Hydrogen production main pipeline; 300—Hydrogen production pipeline; 400—Waste heat transmission pipeline; 500—Hydrogen transmission pipeline; 600—Hydrogen circulation pipeline; 700—Carbon dioxide transmission pipeline; 800—Hydrogen output pipeline. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0032] See Figure 1In one embodiment of this utility model, the BOG low-carbon integrated utilization system includes a BOG storage tank 3, an external transmission pipeline 100, a hydrogen production unit, a hydrogen storage tank 7, a carbon dioxide storage tank 12, a helium extraction unit 15, and a BOG integrated distribution unit 17. The BOG storage tank 3 is connected to the external transmission pipeline 100, the hydrogen production unit, and the helium extraction unit 15, respectively. The hydrogen production unit is also connected to the hydrogen storage tank 7 and the carbon dioxide storage tank 12, respectively. The BOG integrated distribution unit 17 is also connected to the hydrogen storage tank 7, the carbon dioxide storage tank 12, and the helium extraction unit 15, respectively. The hydrogen storage tank 7 is also connected to the external transmission pipeline 100.

[0033] BOG storage tank 3 is used to store BOG gas generated in different stages. In order to achieve the combined storage of BOG gas from various stages, the BOG low-carbon integrated utilization system also includes LNG storage tank 1 and BOG loading and unloading vehicle 2, which are respectively connected to BOG storage tank 3.

[0034] Preferably, the BOG storage tank 3 is a conventional BOG storage device, and its storage pressure and other parameters meet the storage requirements for BOG gas. BOG gas generated from the LNG storage tank 1 and the BOG loading / unloading vehicle 2 flows into the input end of the BOG storage tank 3 through corresponding pipelines. The output end of the BOG storage tank 3 is divided into three paths: the first path flows through the external transmission pipeline 100 into the external transmission network for direct external transmission; the second path flows through the main hydrogen production pipeline 200 into the hydrogen production unit; and the third path flows through the helium production pipeline 300 into the helium extraction unit 15.

[0035] In another embodiment of this utility model, the BOG low-carbon comprehensive utilization system also includes a compressor 4 installed on the external transmission pipeline 100. Thus, when BOG gas is transmitted, the compressor 4 first compresses the BOG gas before delivering it to the external transmission pipeline network, maintaining the pressure of the BOG storage tank 3 within a safe range and improving the safety and stability of the system.

[0036] In another embodiment of this utility model, the hydrogen production unit includes a methane reforming hydrogen production mechanism 6; the BOG storage tank 3 is connected to the hydrogen storage tank 7 and the carbon dioxide storage tank 12 via the methane reforming hydrogen production mechanism 6.

[0037] Preferably, the principle of the methane reforming hydrogen production unit 6 is: the process of reacting methane and water vapor in BOG gas to produce hydrogen and carbon dioxide under the action of a catalyst.

[0038] See Figure 2Preferably, the methane reforming hydrogen production unit 6 includes a purification tower 601, a pre-conversion tower 602, a first-stage conversion tower 603, and a pressure swing adsorption tower 604 connected in sequence. The BOG storage tank 3 is connected to the purification tower 601, and the pressure swing adsorption tower 604 is connected to the hydrogen storage tank 7 and the carbon dioxide storage tank 12, respectively. In use, the BOG gas enters the purification tower 601 and is purified by pressurization and preheating to remove sulfur-containing impurities (the sulfur content is reduced to below ppm level). Then it enters the pre-conversion tower 602, where the methane in the pressurized, preheated, and purified BOG gas is mixed with water vapor and converted into a mixture of carbon monoxide and hydrogen. Further, in the first-stage conversion tower 603, the carbon monoxide in the mixture is converted into carbon dioxide, generating hydrogen and carbon dioxide. Finally, the hydrogen is purified in the pressure swing adsorption tower 604, achieving the separation of hydrogen and carbon dioxide gases. The hydrogen is stored in the hydrogen storage tank 7, and the carbon dioxide is stored in the carbon dioxide storage tank 12. In practice, the processes of converting methane into carbon monoxide and hydrogen by mixing with water vapor, as well as the process of converting carbon monoxide into carbon dioxide (parameters and reaction conditions), are all existing mature technologies and will not be described in detail here.

[0039] Preferably, hydrogen and carbon dioxide gases are generated at the output end of the methane reforming hydrogen production unit 6, i.e., at the output end of the pressure swing adsorption tower 604. The hydrogen gas is first collected into the hydrogen storage tank 7 via the hydrogen transmission pipeline 500, and then enters the BOG integrated distribution unit 17 for distribution and utilization. The carbon dioxide gas is first collected into the carbon dioxide storage tank 12 via the carbon dioxide transmission pipeline 700, and then enters the BOG integrated distribution unit 17 for distribution and utilization.

[0040] See Figure 2 Preferably, the hydrogen production unit further includes a methane pyrolysis hydrogen production unit 5 that runs parallel to the methane reforming hydrogen production unit 6; the BOG storage tank 3 is connected to the hydrogen storage tank 7 via the methane pyrolysis hydrogen production unit 5; the methane pyrolysis hydrogen production unit 5 is also connected to the BOG integrated distribution unit 17.

[0041] The basic principle of the methane pyrolysis hydrogen production unit 5 is to pyrolyze methane in BOG gas at a high temperature (approximately 1200℃), decomposing it into a hydrogen-rich gas and solid carbon. Methane pyrolysis hydrogen production is existing technology and will not be elaborated upon here. Since the methane pyrolysis hydrogen production unit 5 produces solid carbon, the hydrogen gas is stored in the hydrogen storage tank 7, while the solid carbon is collected separately. Furthermore, waste heat is generated during the operation of the methane pyrolysis hydrogen production unit 5. To recover this waste heat, a ground source heat pump 11 is installed between the methane pyrolysis hydrogen production unit 5 and the BOG integrated distribution unit 17. The waste heat generated is recovered to the BOG integrated distribution unit 17 via the ground source heat pump 11. Preferably, there are two output points at the methane pyrolysis hydrogen production unit 5. One output point is for hydrogen gas, which is first collected into the hydrogen storage tank 7 via the hydrogen transmission pipeline 500, and then enters the BOG integrated distribution unit 17 for distribution and reuse. The other output point is for waste heat, which is transported to the ground source heat pump 11 via the waste heat transmission pipeline 400 and then enters the BOG integrated distribution unit 17 for distribution and reuse.

[0042] In another embodiment of this utility model, the hydrogen stored in the hydrogen storage tank 7, in addition to entering the BOG integrated distribution unit 17, also flows into the external transmission pipeline 100 through the hydrogen circulation pipeline 600, and is mixed with the BOG gas or sent into the external transmission network separately through the compressor 4.

[0043] In another embodiment of the present invention, the BOG low-carbon integrated utilization system further includes a fuel cell module 9 disposed between the hydrogen storage tank 7 and the BOG integrated distribution unit 17; the fuel cell module 9 is also connected to the BOG integrated distribution unit 17 via a ground source heat pump 11.

[0044] The main function of fuel cell module 9 is to produce a fuel cell using hydrogen as a raw material. The reaction in the fuel cell is: H₂ + 1 / 2O₂ == H₂O. The electricity generated by the fuel cell is output to the BOG integrated distribution unit 17 for reuse. Simultaneously, the heat generated in the fuel cell is also transferred to the BOG integrated distribution unit 17 via the ground source heat pump 11 for reuse, thus utilizing the hydrogen stored in hydrogen storage tank 7, achieving energy conservation and environmental protection. The fuel cell reaction in fuel cell module 9 is a known existing technology and will not be described in detail here.

[0045] In another embodiment of this utility model, the BOG low-carbon integrated utilization system also includes a hydrogen supply station 10 parallel to the fuel cell module 9; the hydrogen storage tank 7 is connected to the BOG integrated distribution unit 17 via the hydrogen supply station 10, and the generated hydrogen is directly pressurized and stored through the hydrogen supply station 10.

[0046] The hydrogen supply station 10 is a dedicated station that provides hydrogen refueling services. The hydrogen delivered from the hydrogen storage tank 7 is pressurized by a compressor, stored, and then enters the BOG integrated distribution unit 17 for distribution and reuse.

[0047] Preferably, in order to transport the hydrogen stored in the hydrogen storage tank 7 to the fuel cell module 9 and the hydrogen supply station 10, a hydrogen tanker truck 8 is installed at the rear end of the hydrogen storage tank 7 on the hydrogen transmission pipeline 500, and the hydrogen is transported by the hydrogen tanker truck 8. In practice, there are one or more hydrogen tanker trucks 8, and multiple hydrogen tanker trucks 8 can simultaneously transport hydrogen to the fuel cell module 9 and the hydrogen supply station 10, thereby improving the transportation efficiency.

[0048] In another embodiment of this utility model, the BOG low-carbon integrated utilization system further includes a carbon dioxide supply station 14 located between the carbon dioxide storage tank 12 and the BOG integrated distribution unit 17. Preferably, in order to transport the carbon dioxide gas stored in the carbon dioxide storage tank 12 to the carbon dioxide supply station 14, a carbon dioxide tanker truck 13 is installed on the carbon dioxide transport pipeline 700, and the carbon dioxide tanker truck 13 is used to achieve rapid transport of carbon dioxide gas to the carbon dioxide supply station 14.

[0049] In use, the main function of the carbon dioxide supply station 14 is to provide a stable and safe supply of high-purity carbon dioxide gas for subsequent carbon dioxide processes, and to ensure its efficient transportation and storage. The carbon dioxide gas stored in the carbon dioxide storage tank 12 is first transported to the carbon dioxide supply station 14 for storage, and then enters the BOG integrated distribution unit 17 for distribution and reuse.

[0050] In another embodiment of the present invention, the BOG low-carbon integrated utilization system further includes a helium compressor 16 disposed between the BOG integrated distribution unit 17 and the helium extraction unit 15.

[0051] See Figure 3 Preferably, the helium extraction unit 15 includes a catalytic dehydrogenation device 1501, a membrane separation device 1502, a pressure swing adsorption device 1503, and a helium purification device 1504. BOG gas from the BOG storage tank 3 enters the catalytic dehydrogenation device 1501 via the helium production pipeline 300 to remove hydrogen impurities and achieve initial helium enrichment. Then it enters the membrane separation device 1502 and the pressure swing adsorption device 1503, where nitrogen, methane, and other major impurities are deeply removed through membrane separation and pressure swing adsorption. Then it enters the helium purification device 1504, where deep cryogenic purification is used to precisely remove impurities and obtain ultrapure helium products. The generated high-purity helium enters the helium output pipeline 800, is pressurized by the helium compressor 16, and then enters the BOG integrated distribution unit 17 for distribution and reuse.

[0052] See Figure 1In this invention, the BOG gas in the BOG storage tank 3, besides being directly used in the external pipeline network, undergoes further processing through a hydrogen production unit and a helium extraction unit 15, producing hydrogen, carbon dioxide gas, solid carbon, helium, and waste heat. The solid carbon is ultimately collected and utilized, while the carbon dioxide gas, helium, and waste heat enter the BOG integrated distribution unit 17. One path of hydrogen gas directly enters the BOG integrated distribution unit 17, while another path generates electricity for fuel cells, which then enters the BOG integrated distribution unit 17. The purpose of the BOG integrated distribution unit 17 is to collect the gas, electrical energy, and heat energy generated during BOG processing and then distribute them according to the needs of downstream processes. For example, if a downstream process requires heating, the waste heat generated during BOG processing (from the hydrogen production unit) is transported to the factory for heating. Preferably, the downstream processes also include factory power supply, electric vehicle battery swapping, carbon dioxide users, hydrogen users, and helium users. During use, the distribution is based on the needs of the downstream processes, achieving comprehensive reuse of BOG gas, effective utilization of BOG gas, avoiding resource waste, and further improving the utilization rate of BOG gas.

[0053] It should be noted that the equipment used in this invention meets the pressure and temperature requirements for the reaction and transportation of BOG gas, hydrogen, carbon dioxide and helium.

[0054] It should be noted that in the BOG low-carbon comprehensive utilization system of this utility model, valves can be installed on various pipelines as needed to ensure stable system operation. For example, valves can be installed on the three output pipelines of the BOG storage tank 3, namely, valves on the external output pipeline 100, the main hydrogen production pipeline 200, and the helium production pipeline 300, to control which method of BOG gas is processed and reused. Valves can also be installed between the main hydrogen production pipeline 200 and the methane reforming hydrogen production unit 6, and between the main hydrogen production pipeline 200 and the methane pyrolysis hydrogen production unit 5, so that the BOG gas can be processed and utilized using the methane reforming hydrogen production unit 6 and / or the methane pyrolysis hydrogen production unit 5, depending on the processing needs. Control valves can also be installed on other pipelines as needed. In this utility model, the installation method and requirements of the valves on the pipelines are conventional and known technologies in the field, and will not be described in detail here.

[0055] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A BOG low-carbon comprehensive utilization system, characterized in that, It includes a BOG storage tank (3), an external pipeline (100), a hydrogen production unit, a hydrogen storage tank (7), a carbon dioxide storage tank (12), a helium extraction unit (15), and a BOG integrated distribution unit (17); The BOG storage tank (3) is connected to the external transmission pipeline (100), the hydrogen production unit and the helium extraction unit (15) respectively; the hydrogen production unit is also connected to the hydrogen storage tank (7) and the carbon dioxide storage tank (12) respectively; the BOG integrated distribution unit (17) is also connected to the hydrogen storage tank (7), the carbon dioxide storage tank (12) and the helium extraction unit (15) respectively; the hydrogen storage tank (7) is also connected to the external transmission pipeline (100).

2. The BOG low-carbon comprehensive utilization system according to claim 1, characterized in that, The hydrogen production unit includes a methane reforming hydrogen production mechanism (6); the BOG storage tank (3) is connected to the hydrogen storage tank (7) and the carbon dioxide storage tank (12) via the methane reforming hydrogen production mechanism (6).

3. The BOG low-carbon comprehensive utilization system according to claim 2, characterized in that, The hydrogen production unit also includes a methane pyrolysis hydrogen production unit (5) that runs parallel to the methane reforming hydrogen production unit (6); the BOG storage tank (3) is connected to the hydrogen storage tank (7) via the methane pyrolysis hydrogen production unit (5); the methane pyrolysis hydrogen production unit (5) is also connected to the BOG integrated distribution unit (17).

4. The BOG low-carbon comprehensive utilization system according to claim 3, characterized in that, A ground source heat pump (11) is installed between the methane pyrolysis hydrogen production unit (5) and the BOG integrated distribution unit (17).

5. The BOG low-carbon comprehensive utilization system according to claim 4, characterized in that, The BOG low-carbon integrated utilization system also includes a fuel cell module (9) located between the hydrogen storage tank (7) and the BOG integrated distribution unit (17); the fuel cell module (9) is also connected to the BOG integrated distribution unit (17) via a ground source heat pump (11).

6. The BOG low-carbon comprehensive utilization system according to claim 5, characterized in that, The BOG low-carbon integrated utilization system also includes a hydrogen supply station (10) parallel to the fuel cell module (9); the hydrogen storage tank (7) is connected to the BOG integrated distribution unit (17) via the hydrogen supply station (10).

7. The BOG low-carbon comprehensive utilization system according to claim 1, characterized in that, The BOG low-carbon integrated utilization system also includes a carbon dioxide supply station (14) between the carbon dioxide storage tank (12) and the BOG integrated distribution unit (17).

8. The BOG low-carbon comprehensive utilization system according to claim 1, characterized in that, The BOG low-carbon integrated utilization system also includes a helium compressor (16) located between the BOG integrated distribution unit (17) and the helium extraction unit (15).

9. The BOG low-carbon comprehensive utilization system according to claim 1, characterized in that, The BOG low-carbon integrated utilization system also includes an LNG storage tank (1) and a BOG loading and unloading vehicle (2) that are respectively connected to the BOG storage tank (3).

10. The BOG low-carbon comprehensive utilization system according to claim 1, characterized in that, The BOG low-carbon integrated utilization system also includes a compressor (4) installed on the external transmission pipeline (100).

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