Liquid carbon dioxide tank for CCUS carbon sequestration

Abstract

The invention relates to a CCUS carbon sequestration technology and aims at solving the technical problems that an existing CCUS carbon sequestration container cannot store liquid carbon dioxide and cannot be connected with fracturing equipment in a matched mode, the pipeline pressure is low, and the flow speed is low. The liquid carbon dioxide tank for CCUS carbon sequestration comprises a liquid carbon dioxide loading and unloading pipeline arranged on the outer side wall of one end of a tank body. The liquid carbon dioxide loading and unloading pipeline comprises an emptying pipeline, a liquid outlet pipeline, a gas phase pipeline, a liquid inlet pipeline and a pressure relief pipeline; the emptying pipeline is used for releasing pressure in each pipeline, and the outlet end of the emptying pipeline extends outwards towards the top of the tank body; a pressure regulating pipeline communicated with the liquid outlet pipeline is arranged on the gas phase pipeline; the gas phase pipeline is also connected with at least one group of pressure release valves; a bypass pipeline connector is arranged in the middle of the pressure relief pipeline and used for being communicated with a pressure relief valve on a gas phase pipeline. And the liquid level monitoring pipeline is used for measuring pressure and liquid level information of a medium in the tank body.

Description

Technical Field

[0001] The present invention relates to CCUS carbon sequestration technology, and in particular to a liquid carbon dioxide tank for CCUS carbon sequestration. Background Art

[0002] With the rise of green and low-carbon industries, carbon capture, utilization and storage (hereinafter referred to as CCUS) has been continuously promoted and applied in the petrochemical industry in recent years as an important carbon emission reduction measure. The liquid carbon dioxide tank container used in CCUS carbon storage is a key equipment used in the carbon storage process. It is imperative to study the liquid carbon dioxide tank container used for CCUS carbon storage.

[0003] Liquid carbon dioxide tank containers for CCUS carbon storage are required to comply with the technical regulations for mobile pressure vessels and tank containers, be able to meet the short-term storage of liquid carbon dioxide media, meet various functional requirements during the CCUS fracturing process, and ensure the safety and reliability of equipment operation.

[0004] However, the existing CCUS carbon storage liquid carbon dioxide tank containers are only used to transport liquid carbon dioxide and do not have the function of storing liquid carbon dioxide and matching fracturing equipment. Therefore, the design pressure of the tank container is only a low value of 2.2MPa, the pipeline pressure is low, and the flow rate is slow, which cannot meet user needs. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems that the existing CCUS carbon storage liquid carbon dioxide tank container cannot be connected to the fracturing equipment, the pipeline pressure is low, the flow rate is slow, etc., and to propose a liquid carbon dioxide tank for CCUS carbon storage.

[0006] To achieve the above objectives, the technical solution proposed by the present invention is:

[0007] A liquid carbon dioxide tank for CCUS carbon sequestration comprises a tank body, wherein a liquid inlet pipe port, a gas phase pipe port and an upper liquid level pipe port are provided at the top of the rear end of the tank body, and a liquid discharge pipe port and a sewage discharge pipe port are provided at the bottom; the special feature of the tank body is that a liquid carbon dioxide loading and unloading pipeline is provided on the outer side wall at one end of the tank body;

[0008] The liquid carbon dioxide loading and unloading pipeline includes a venting pipeline whose inlet end is arranged at the bottom of the outer wall of the rear end of the tank body, a liquid outlet pipeline, a gas phase pipeline, a liquid inlet pipeline, and a pressure relief pipeline located above the inlet end of the venting pipeline and arranged on the outer wall of the tank body from bottom to top; the venting pipeline is used to release the pressure in each pipeline, and the outlet end of the venting pipeline is located at the top of the tank body and extends outward; the inlet end of the venting pipeline is connected to the liquid outlet pipeline, the gas phase pipeline, the liquid inlet pipeline, and the gas phase pipe port through a valve connecting pipe respectively;

[0009] One end of the liquid outlet pipeline is connected to the liquid discharge pipe port, and the other end is provided with a liquid outlet; one end of the liquid inlet pipeline is provided with a first interface adapted to an external storage tank, and the other end is connected to the liquid inlet pipe port;

[0010] The outlet end of the gas phase pipeline is provided with a second interface adapted to the external storage tank, and the inlet end is connected to the gas phase pipe port. The gas phase pipeline is provided with a pressure regulating pipeline connected to the liquid outlet pipeline for supplementing the pressure of the liquid outlet pipeline; the gas phase pipeline is also connected to at least one set of pressure relief valves for releasing the internal pressure of the tank body;

[0011] One end of the pressure relief pipeline is connected to the gas phase pipe port, and the other end is connected to the vent pipeline. A bypass pipeline interface is provided in the middle of the pressure relief pipeline for connecting to the pressure relief valve on the gas phase pipeline.

[0012] Valve assemblies are provided between each interconnected pipe opening and pipeline, and between pipelines;

[0013] One end of the liquid level monitoring pipeline is connected to the upper liquid level pipe port, and the other end is connected to the sewage discharge pipe port, and is used to measure the pressure and liquid level information of the medium in the tank.

[0014] Furthermore, an anti-blocking pipeline is provided on the outlet end of the vent pipeline;

[0015] The anti-blocking pipeline includes a horizontal through pipe, a U-shaped through pipe and a vertical through pipe which are sequentially connected to the outlet end of the venting pipeline. The opening end of the U-shaped through pipe faces upward to prevent liquid or impurities from flowing back into the anti-blocking pipeline.

[0016] Furthermore, the vent pipeline is also provided with a vent master control valve for controlling the pressure discharge of the vent pipeline.

[0017] Furthermore, the valve assembly on the liquid outlet pipeline includes an electric control valve and a manual control valve, wherein the electric control valve is used for remote control by an operator, and the manual control valve is used for manually controlling the on and off of the liquid outlet pipeline;

[0018] A safety valve is arranged between the electric control valve and the manual control valve to prevent the medium on the pipeline between the two sets of valves from damaging the valves and ensure the safety of the tank.

[0019] Furthermore, the pipeline diameter of the liquid outlet on the liquid outlet pipeline is adapted to the diameter of the external interface pipeline.

[0020] Furthermore, the pressure relief valve is a ball valve or a stop valve, both ends of which are connected to the gas phase pipeline and the pressure relief pipeline through conduits, respectively, for releasing the internal pressure of the tank.

[0021] Further, the liquid level monitoring pipeline includes a liquid level pressure measuring pipeline and a liquid level gauge;

[0022] The liquid level pressure measurement pipeline includes a differential pressure liquid level gauge and a stop valve arranged on the outer side wall of the tank body. The collection end of the differential pressure liquid level gauge is provided with two pressure measuring connecting pipes, which are respectively connected to the upper liquid level pipe port and the sewage pipe port to measure the pressure change inside the tank body; the stop valve is arranged at the collection end of the differential pressure liquid level gauge to control the connection or disconnection between the differential pressure liquid level gauge and the inside of the tank body;

[0023] The two ends of the liquid level gauge are respectively fixed at the radial high position and low position on the outer side wall of the tank body, and the two ends are respectively connected to the upper liquid level pipe port and the sewage pipe port through the liquid level connecting pipe, and are used to measure the liquid level information inside the tank body. The measuring range is not less than 4 / 5 of the inner diameter of the tank body.

[0024] Furthermore, a pressure bypass pipeline is also provided on the liquid level pressure measurement pipeline, and a pressure transmitter is provided on the pressure bypass pipeline for transmitting the internal pressure information of the tank to an external data receiving device.

[0025] Furthermore, the liquid level meter is provided with a liquid level transmitter for transmitting the liquid level information inside the tank to an external data receiving device.

[0026] Furthermore, the liquid level gauge is a magnetic flap liquid level gauge.

[0027] Beneficial effects of the present invention:

[0028] [1] The liquid carbon dioxide tank used for CCUS carbon sequestration of the present invention can not only realize the transportation and short-term storage of liquid carbon dioxide medium, but also meet the pressure in the CCUS fracturing process, thereby ensuring the production safety of users and effectively improving the pressure bearing capacity and safety performance of the tank.

[0029] [2] The present invention can effectively ensure the safety performance during CCUS fracturing by arranging a liquid outlet pipeline at the bottom of the tank body and arranging an electric control valve on the liquid outlet pipeline. The loading and unloading pipeline can be remotely controlled, thereby improving the discharge efficiency, effectively reducing the on-site work intensity and safety risks, reducing the labor intensity of operators, ensuring the life safety and property safety of operators, improving work efficiency, and saving discharge time and human resources.

[0030] [3] The present invention can effectively release the pressure of the liquid outlet pipeline, the liquid inlet pipeline, the gas phase pipeline and the pipeline inside the tank body by arranging multiple valve connecting pipes and the venting master control valve on the venting pipeline, and is convenient for operators to disassemble and repair each pipeline separately. It can also be used to discharge residual liquid after the medium inside the tank body is unloaded and loaded, effectively improving the safety performance and operability of the tank body, facilitating later maintenance, extending the service life of the loading and unloading pipelines, and saving production and maintenance costs.

[0031] [4] The present invention can effectively prevent liquid or impurities from flowing back into the blocked pipeline by arranging an anti-blocking pipeline at the outlet end of the venting pipeline, thereby ensuring the pressure relief performance of the venting pipeline, avoiding poor pressure release caused by blockage of the tank body or the loading and unloading pipeline, and greatly improving the safety and reliability of the loading and unloading pipeline.

[0032] [5] The present invention arranges the venting pipeline and the liquid outlet pipeline at the bottom of the outer wall of the tank body, which can not only ensure that the pressure in each pipeline is effectively released, but also avoid medium leakage in other pipelines during the liquid discharge process, effectively improve the pressure relief performance of the venting pipeline, as well as the liquid discharge efficiency and liquid discharge rate of the liquid outlet pipeline, and improve the practicability of the loading and unloading pipelines.

[0033] [6] The present invention sets a pressure regulating pipeline between the gas phase pipeline and the liquid outlet pipeline, which can effectively supplement the pressure of the liquid outlet pipeline, avoid excessive pressure gradient reduction when the liquid carbon dioxide medium is discharged from the liquid outlet pipeline in the initial stage of liquid unloading, and then sublime into dry ice, resulting in pipeline blockage, affecting the normal use of the loading and unloading pipeline, and effectively improving the safety performance of the loading and unloading pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the connection between the tank body and the liquid carbon dioxide loading and unloading pipeline in the embodiment of the liquid carbon dioxide tank for CCUS carbon sequestration of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of a liquid carbon dioxide loading and unloading pipeline in an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of the anti-blocking pipeline in an embodiment of the present invention;

[0037] Reference numerals:

[0038] 1-tank body, 2-vent pipeline, 3-liquid outlet pipeline, 4-gas phase pipeline, 5-liquid inlet pipeline, 6-pressure relief pipeline, 7-liquid level pressure measurement pipeline, 8-liquid level gauge, 9-valve connecting pipe, 10-liquid outlet, 11-first interface, 12-liquid inlet pipe, 13-second interface, 14-pressure regulating pipeline, 15-pressure relief valve, 16-anti-blocking pipeline, 17-horizontal through pipe, 18-U-shaped through pipe, 19-vertical through pipe, 20-venting main control valve, 21-electrically controlled valve, 22-manually controlled valve, 23-gas phase pipe port, 24-upper liquid level pipe port, 25-liquid unloading pipe port, 26-sewage pipe port. DETAILED DESCRIPTION

[0039] A liquid carbon dioxide tank for CCUS carbon sequestration, comprising a tank body 1, such as Figure 1As shown, the top of the rear end of the tank body 1 is provided with a liquid inlet port 12, a gas phase port 23 and an upper liquid level port 24, and the bottom is provided with a liquid discharge port 25 and a sewage discharge port 26; a liquid carbon dioxide loading and unloading pipeline is provided on the outer side wall at one end of the tank body 1;

[0040] like Figure 2 As shown, the liquid carbon dioxide loading and unloading pipeline includes a venting pipeline 2 whose inlet end is arranged at the bottom of the outer wall of the rear end of the tank body 1, a liquid outlet pipeline 3 located above the inlet end of the venting pipeline 2 and arranged on the outer wall of the rear end of the tank body 1 from bottom to top, a gas phase pipeline 4, a liquid inlet pipeline 5, a pressure relief pipeline 6 and a liquid level pressure measuring pipeline 7, and a liquid level gauge 8 arranged between the high position and the low position on the outer wall of the tank body 1 in the radial direction;

[0041] The inlet end of the venting pipeline 2 is connected to the liquid outlet pipeline 3, the gas phase pipeline 4, the liquid inlet pipeline 5, and the gas phase pipe port 23 through the valve connecting pipe 9 respectively. A venting master control valve 20 is arranged on the venting pipeline 2 near the valve connecting pipe 9 connected to the inside of the tank body. Each valve connecting pipe 9 is used to control the venting pipeline 2 to release the pressure in each pipeline. The arrangement of each valve connecting pipe 9 and the venting master control valve 20 can facilitate the construction personnel to carry out the disassembly operation of each pipeline, ensuring the safety of the disassembly operation. At the same time, the venting pipeline 2 can also be used to discharge the residual liquid after the medium inside the tank body is unloaded;

[0042] The outlet end of the venting pipeline 2 is located at the top of the tank and extends outward, and an anti-blocking pipeline 16 is provided on the outlet end; Figure 3 As shown, the anti-blocking pipeline 16 includes a horizontal through pipe 17, a U-shaped through pipe 18 and a vertical through pipe 19 which are sequentially connected to the outlet end of the venting pipeline 2. The open end of the U-shaped through pipe 18 faces upward, and the horizontal through pipe 17 and the vertical through pipe 19 are respectively connected to the two open ends of the U-shaped through pipe 18, which are used for the liquid or impurities to flow back into the loading and unloading pipeline, thereby ensuring the pressure relief performance of the venting pipeline 2, effectively avoiding the accumulation of rain, snow or other impurities, causing ice blockage inside the loading and unloading pipeline, and avoiding safety accidents caused by poor pressure release of the tank or the loading and unloading pipeline.

[0043] One end of the liquid outlet pipeline 3 is connected to the liquid unloading pipe port 25, and the other end is provided with a liquid outlet 10. An electric-controlled valve 21 is provided at a position near the liquid outlet 10 on the liquid outlet pipeline 3, which is used for remote control by the operator, and can effectively increase the liquid unloading speed and improve the liquid unloading efficiency; a manual-controlled valve 22 is provided on the liquid outlet pipeline 3 near the liquid unloading pipe port 25, which is used to manually control the on-off of the liquid outlet pipeline 3 to ensure safe operation; the manual-controlled valve 22 works together with the electric-controlled regulating valve 21, and is used for the operator to remotely control the on-off or flow rate of the pipeline. When the electric-controlled regulating valve 21 needs to be offline for maintenance or has a poor seal, the manual-controlled valve 22 can be used to individually control the on-off of the liquid outlet pipeline 3 to ensure safe operation.

[0044] The pipeline between the liquid outlet pipeline 3 and the tank body 1 can prevent the outer wall of the liquid outlet pipeline 3 from frosting or even freezing due to the low temperature when there is a low-temperature medium in the tank body, thereby affecting the valve operation; this structure can not only effectively ensure the discharge rate and discharge efficiency of the liquid outlet pipeline 3, but also ensure the rationality of the layout position of other pipelines in the loading and unloading pipeline, and ensure that the layout position of the gas phase pipeline 4, the liquid inlet pipeline 5, the pressure relief pipeline 6 and the liquid level monitoring pipeline are located above the liquid outlet pipeline 3, so as to avoid medium leakage on the connection surface between other pipelines and the outer wall of the tank body 1 during the discharge process.

[0045] One end of the liquid inlet pipeline 5 is provided with a first interface 11 adapted to an external liquid carbon dioxide tank truck or a fixed storage tank, and the other end is connected to a liquid inlet pipe port 12 provided on the top of the tank body, for introducing the medium into the tank body;

[0046] The outlet end of the gas phase pipeline 4 is provided with a second interface 13 adapted to an external liquid carbon dioxide tank truck or a fixed storage tank, and the inlet end is connected to a gas phase pipe port 23 provided on the top of the tank body. A pressure regulating pipeline 14 connected to the liquid outlet pipeline 3 is provided on the gas phase pipeline 4 near the second interface 13, which is used to supplement the pressure of the liquid outlet pipeline 3 to prevent the pressure gradient of the liquid carbon dioxide medium from decreasing too much when it is discharged from the liquid outlet pipeline 3 at the initial stage of unloading and then sublimating into dry ice, causing pipeline blockage and affecting the normal use of the loading and unloading pipeline; at least one set of pressure relief valves 15 are also connected to the gas phase pipeline 4 located above the pressure regulating pipeline 14, which are used to release the pressure when the internal pressure of the tank body is abnormally increased due to factors such as fire in an emergency, so as to protect the safety of the tank body and the operating personnel; the gas phase pipeline 4 is used to balance the gas phase pressure between the tank container and the external facilities, and to pressurize the tank container internally.

[0047] The pressure relief valve 15 is a ball valve or a stop valve, and its outlet end is connected to the gas phase pipeline 4 and the pressure relief pipeline 6 through a metal hose, respectively, for releasing the medium pressure in each pipeline; one end of the pressure relief pipeline 6 is connected to the gas phase pipe port 23, and the other end is connected to the venting pipeline 2. A bypass pipeline interface is provided in the middle of the pressure relief pipeline 6 for connecting with the pressure relief valve 15 on the gas phase pipeline 4. The pressure relief pipeline 6 is used to actively release the pressure inside the tank body and the gas phase pipeline 4;

[0048] Each interconnected pipe port and pipeline, and between pipelines are provided with a valve assembly; the valve assembly on the liquid outlet pipeline 3 includes an electric control valve 21 and a manual control valve 22, wherein the electric control valve 21 is used for remote control by an operator, and the manual control valve 22 is used for manually controlling the on and off of the liquid outlet pipeline 3;

[0049] A safety valve is provided between the electric control valve 21 and the manual control valve 22 to prevent the medium in the pipeline between the two sets of valves from damaging the valves and ensure the safety of the tank.

[0050] The liquid level monitoring pipeline includes a liquid level pressure measuring pipeline 7 and a liquid level gauge 8; the liquid level pressure measuring pipeline 7 includes a differential pressure liquid level gauge and a stop valve arranged on the outer side wall of the tank body 1, and the collection end of the differential pressure liquid level gauge is provided with two pressure measuring connecting pipes, and the two pressure measuring connecting pipes are respectively connected to the upper liquid level pipe port 24 and the sewage pipe port 26, and are used to measure the pressure change inside the tank body; the stop valve is arranged at the collection end of the differential pressure liquid level gauge, and is used to control the connection or disconnection between the differential pressure liquid level gauge and the inside of the tank body. The liquid level pressure measuring pipeline 7 is also provided with a pressure bypass pipeline, and the pressure bypass pipeline is provided with a pressure transmitter, which is used to transmit the internal pressure information of the tank body to the external data receiving device;

[0051] The liquid level gauge 8 is a magnetic flap liquid level gauge, whose two ends are respectively fixed on the radial high position and low position on the outer wall of the tank body 1, and its two ends are respectively connected with the upper liquid level pipe port 24 and the sewage pipe port 26 through the liquid level connecting pipe, and is used to observe the liquid level information inside the tank body, and its measuring range is not less than 4 / 5 of the inner diameter of the tank body 1; the liquid level gauge 8 is provided with a liquid level transmitter for transmitting the liquid level information inside the tank body to an external data receiving device.

Claims

1. A liquid carbon dioxide tank for CCUS carbon sequestration, comprising a tank body (1), wherein the top of the rear end of the tank body (1) is provided with a liquid inlet pipe port (12), a gas phase pipe port (23) and an upper liquid level pipe port (24), and the bottom is provided with a liquid discharge pipe port (25) and a sewage discharge pipe port (26), characterized in that: A liquid carbon dioxide loading and unloading pipeline is provided on the outer side wall of one end of the tank body (1); The liquid carbon dioxide loading and unloading pipeline comprises a venting pipeline (2) whose inlet end is arranged at the bottom of the outer wall of the rear end of the tank body (1), a liquid outlet pipeline (3) located above the inlet end of the venting pipeline (2) and arranged from bottom to top on the outer wall of the rear end of the tank body (1), a gas phase pipeline (4), a liquid inlet pipeline (5), and a pressure relief pipeline (6); the outlet end of the venting pipeline (2) is located at the top of the tank body and extends outward; the inlet end of the venting pipeline (2) is connected to the liquid outlet pipeline (3), the gas phase pipeline (4), the liquid inlet pipeline (5), and the gas phase pipe opening (23) respectively through a valve connecting pipe (9); One end of the liquid outlet pipeline (3) is in communication with the liquid discharge pipe opening (25), and the other end is provided with a liquid outlet (10); one end of the liquid inlet pipeline (5) is provided with a first interface (11) adapted to an external storage tank, and the other end is connected to the liquid inlet pipe opening (12); The outlet end of the gas phase pipeline (4) is provided with a second interface (13) adapted to the external storage tank, and the inlet end is connected to the gas phase pipe port (23). The gas phase pipeline (4) is provided with a pressure regulating pipeline (14) connected to the liquid outlet pipeline (3) for increasing the pressure of the liquid outlet pipeline (3); the gas phase pipeline (4) is also connected to at least one set of pressure relief valves (15) for releasing the internal pressure of the tank body; One end of the pressure relief pipeline (6) is connected to the gas phase pipe port (23), and the other end is connected to the venting pipeline (2). A bypass pipeline interface is provided in the middle of the pressure relief pipeline (6) for connecting to the pressure relief valve (15) on the gas phase pipeline (4); Valve assemblies are provided between each interconnected pipe opening and pipeline, and between pipelines; One end of the liquid level monitoring pipeline is connected to the upper liquid level pipe port (24), and the other end is connected to the sewage discharge pipe port (26), and is used to measure the pressure and liquid level information of the medium in the tank.

2. A liquid carbon dioxide tank for CCUS carbon sequestration according to claim 1, characterized in that: An anti-blocking pipeline (16) is provided at the outlet end of the venting pipeline (2); The anti-blocking pipeline (16) comprises a transverse through pipe (17), a U-shaped through pipe (18) and a vertical through pipe (19) which are sequentially connected to the outlet end of the venting pipeline (2); the opening end of the U-shaped through pipe (18) faces upwards, and is used to prevent liquid or impurities from flowing back into the anti-blocking pipeline (16).

3. A liquid carbon dioxide tank for CCUS carbon sequestration according to claim 2, characterized in that: The venting pipeline (2) is also provided with a venting master control valve (20) for controlling the pressure discharge of the venting pipeline (2).

4. A liquid carbon dioxide tank for CCUS carbon sequestration according to claim 3, characterized in that: The valve assembly on the liquid outlet pipeline (3) comprises an electric control valve (21) and a manual control valve (22), wherein the electric control valve (21) is used for remote control by an operator, and the manual control valve (22) is used for manually controlling the on and off of the liquid outlet pipeline (3); a safety valve is provided between the electric control valve (21) and the manual control valve (22) to prevent the medium on the pipeline between the two valve groups from damaging the valve, thereby ensuring the safety of the tank.

5. A liquid carbon dioxide tank for CCUS carbon sequestration according to claim 4, characterized in that: The pipeline diameter of the liquid outlet (10) on the liquid outlet pipeline (3) is matched with the diameter of the external interface pipeline.

6. A liquid carbon dioxide tank for CCUS carbon sequestration according to claim 5, characterized in that: The pressure relief valve (15) is a ball valve or a stop valve, and its two ends are respectively connected to the gas phase pipeline (4) and the pressure relief pipeline (6) through conduits, and is used to release the internal pressure of the tank.

7. A liquid carbon dioxide tank for CCUS carbon sequestration according to any one of claims 1 to 6, characterized in that: The liquid level monitoring pipeline comprises a liquid level pressure measuring pipeline (7) and a liquid level meter (8); The liquid level pressure measuring pipeline (7) comprises a differential pressure liquid level gauge and a stop valve arranged on the outer wall of the tank body (1); the collection end of the differential pressure liquid level gauge is provided with two pressure measuring connecting pipes, which are respectively connected to the upper liquid level pipe port (24) and the sewage pipe port (26) for measuring the pressure change inside the tank body; the stop valve is arranged at the collection end of the differential pressure liquid level gauge for controlling the connection or disconnection between the differential pressure liquid level gauge and the inside of the tank body; The two ends of the liquid level meter (8) are respectively fixed at a radially high position and a radially low position on the outer wall of the tank body (1), and the two ends are respectively connected to the upper liquid level pipe port (24) and the sewage pipe port (26) through liquid level connecting pipes, and are used to measure the liquid level information inside the tank body, and the measuring range is not less than 4 / 5 of the inner diameter of the tank body (1).

8. A liquid carbon dioxide tank for CCUS carbon sequestration according to claim 7, characterized in that: The liquid level pressure measuring pipeline (7) is also provided with a pressure bypass pipeline, and the pressure bypass pipeline is provided with a pressure transmitter for transmitting the internal pressure information of the tank to an external data receiving device.

9. A liquid carbon dioxide tank for CCUS carbon sequestration according to claim 8, characterized in that: The liquid level meter (8) is provided with a liquid level transmitter for transmitting the liquid level information inside the tank to an external data receiving device.

10. A liquid carbon dioxide tank for CCUS carbon sequestration according to claim 9, characterized in that: The liquid level meter (8) is a magnetic flap liquid level meter.

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