Liquid carbon dioxide transfer system and method

Abstract

The invention provides a liquid carbon dioxide transfer system and method, and belongs to the field of liquid carbon dioxide treatment and transfer. The transfer system comprises a first pipeline, a second pipeline and a third pipeline, and the first pipeline is connected with the second pipeline through the third pipeline; and in the process that the first storage device or the second storage device pressurizes the second pipeline, the first pipeline communicates with the second pipeline through the third pipeline so as to pressurize the first pipeline. The first pipeline and the second pipeline are pressurized, so that the liquid carbon dioxide transmission pipeline environment meets the condition that carbon dioxide maintains the liquid carbon dioxide state, and the situation that the liquid carbon dioxide is subjected to phase change to affect the transfer process of the liquid carbon dioxide is avoided. And the first pipeline and the second pipeline are synchronously pressurized through the third pipeline, so that the pressurizing time is shortened, and the pipeline pressurizing link is more convenient.

Description

Technical Field

[0001] The present application belongs to the field of liquid carbon dioxide processing and transfer, and specifically relates to a liquid carbon dioxide transfer system and method. Background Art

[0002] Liquid CO2 is usually stored in tanks or containers at high pressure. Transferring CO2 from one tank or container to another tank, container or transport equipment allows for better storage, transportation and distribution of liquid CO2.

[0003] However, during the transfer of liquid carbon dioxide, liquid carbon dioxide will undergo phase changes under different environments, which will in turn affect the transfer process of liquid carbon dioxide. Summary of the invention

[0004] In response to the above problems, the present application provides a liquid carbon dioxide transfer system and method, which solves the technical problem that the phase change of liquid carbon dioxide during the liquid carbon dioxide transfer process affects the liquid carbon dioxide transfer process. The present application provides a liquid carbon dioxide transfer system. The liquid carbon dioxide transfer system includes: a first pipeline, the first pipeline has a liquid inlet end and a liquid outlet end, the liquid inlet end is connected to a first storage device, and the liquid outlet end is connected to a second storage device; a second pipeline, the second pipeline has a first end and a second end, the first end is connected to the second storage device, and the second end is connected to the first storage device; wherein the first pipeline is connected to the second pipeline through a third pipeline; during the process of the first storage device or the second storage device pressurizing the second pipeline, the first pipeline is connected to the second pipeline through the third pipeline to complete the pressurization of the first pipeline.

[0005] In some embodiments, during the process of filling the second storage device with liquid carbon dioxide from the first storage device, the second storage device is used to transfer gaseous carbon dioxide to the first storage device through the second pipeline, and the first storage device is used to fill the second storage device with liquid carbon dioxide through the first pipeline to complete the filling of the second storage device.

[0006] In some embodiments, the first storage device includes a first opening and closing device, a second opening and closing device, and a storage tank, the storage tank having a first gas phase end and a first liquid phase end, one end of the first opening and closing device is connected to the first liquid phase end, the other end of the first opening and closing device is connected to the liquid inlet end, one end of the second opening and closing device is connected to the first gas phase end, and the other end of the second opening and closing device is connected to the second end.

[0007] In some embodiments, the second storage device includes a third opening and closing device, a fourth opening and closing device, and a receiving tank, the receiving tank having a second gas phase end and a second liquid phase end, one end of the third opening and closing device is connected to the second liquid phase end, the other end of the third opening and closing device is connected to the liquid outlet end, one end of the fourth opening and closing device is connected to the second gas phase end, and the other end of the fourth opening and closing device is connected to the first end.

[0008] In some embodiments, the liquid carbon dioxide transfer system further comprises: a power transmission device connected between the first liquid phase end and the second liquid phase end;

[0009] During the process of charging the second storage device with liquid carbon dioxide from the first storage device, the power transmission device is configured to control the pressure of the fluid in the first pipeline.

[0010] In some embodiments, the liquid carbon dioxide transfer system also includes: a fourth pipeline, the fourth pipeline having an air inlet end and an air outlet end, the air inlet end is connected to the second pipeline, and the air outlet end is connected to the discharge pipeline; wherein, during the pressure relief process of the second pipeline through the fourth pipeline and the discharge pipeline, the first pipeline is connected to the fourth pipeline through the third pipeline, the second pipeline and the fourth pipeline to complete the pressure relief of the first pipeline.

[0011] In some embodiments, the fourth pipeline includes an eighth opening and closing device, which is between the air inlet end and the air outlet end, and is used to control the opening and closing of the fourth pipeline.

[0012] In some embodiments, the third pipeline includes a seventh opening and closing device, which is connected between the first pipeline and the second pipeline, and is used to control the opening and closing of the third pipeline.

[0013] In some embodiments, the first storage device is located at a higher position than the second storage device.

[0014] In some embodiments, the first pipeline includes a third pressure detection device, which is connected between the liquid inlet end and the liquid outlet end; the second pipeline includes a fourth pressure detection device, which is between the first end and the second end. The third pressure detection device is used to detect the pressure in the first pipeline, and the fourth pressure detection device is used to detect the pressure in the second pipeline.

[0015] In some embodiments, the first storage device includes a first pressure detection device, and the second storage device includes a second pressure detection device; wherein, during the process of the first storage device or the second storage device charging the second pipeline, when the value of the first pressure detection device or the second pressure detection device is the same as that of the third pressure detection device and the fourth pressure detection device, the charging of the first pipeline is completed.

[0016] Correspondingly, the present application also provides a liquid carbon dioxide transfer method, which is applied to the liquid carbon dioxide transfer system as in the above-mentioned embodiment. During the process of pressurizing the second pipeline by the first storage device or the second storage device, the first pipeline is connected to the second pipeline through the third pipeline to complete the pressurization of the first pipeline.

[0017] In some embodiments, during the process of filling the second storage device with liquid carbon dioxide from the first storage device, the second storage device is used to transfer gaseous carbon dioxide to the first storage device through the second pipeline, and the first storage device is used to fill the second storage device with liquid carbon dioxide through the first pipeline to complete the filling of the second storage device.

[0018] In some embodiments, during the process of the second pipeline being depressurized through the fourth pipeline via the discharge pipeline, the first pipeline is connected to the fourth pipeline through the third pipeline and the second pipeline to complete the depressurization of the first pipeline. The beneficial effect of the present application is that the present application provides a liquid carbon dioxide transfer system and method, the transfer system includes a first pipeline, a second pipeline, and a third pipeline, the first pipeline is connected to the second pipeline through the third pipeline; during the process of the first storage device or the second storage device pressurizing the second pipeline, the first pipeline is connected to the second pipeline through the third pipeline to complete the pressurization of the first pipeline. The present application pressurizes the first pipeline and the second pipeline so that the environment of the liquid carbon dioxide transmission pipeline satisfies the state of carbon dioxide maintaining liquid carbon dioxide, avoiding the phase change of liquid carbon dioxide affecting the transfer process of liquid carbon dioxide. And the synchronous charging of the first pipeline and the second pipeline through the third pipeline shortens the charging time, making the pipeline charging link more convenient. Explanations of the drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of a liquid carbon dioxide transfer system provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of an exemplary structure of a transfer system provided in an embodiment of the present application;

[0022] Figure 3 Another exemplary structural diagram of the transfer system provided in the embodiment of the present application;

[0023] Figure 4 A schematic diagram of another exemplary structure of the transfer system provided in the embodiment of the present application;

[0024] Figure 5 A schematic diagram of another exemplary structure of the transfer system provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of another exemplary structure of the transfer system provided in the embodiment of the present application;

[0026] Figure 7 A schematic diagram of a process for transferring liquid carbon dioxide provided in an embodiment of the present application;

[0027] Description of reference numerals:

[0028] 10-first storage device, 11-storage tank, 111-first gas phase end, 112-first liquid phase end, 12-first opening and closing device, 121-first pneumatic valve, 122-first manual valve, 13-second opening and closing device, 131-second pneumatic valve, 132-second manual valve, 14-first pressure detection device, 15-first liquid level sensor, 16-first safety valve, 20-second storage device, 21-receiving tank, 211-second gas phase end, 212-second liquid phase end, 22-third opening and closing device, 221-third pneumatic valve, 222-third manual valve, 23-fourth opening and closing device, 231-fourth pneumatic valve, 232-fourth manual valve, 24-second pressure detection device, 25-second Liquid level sensor, 26-second safety valve, 30-first pipeline, 31-liquid inlet end, 32-liquid outlet end, 33-fifth opening and closing device, 331-fifth manual valve, 34-third pressure detection device, 40-second pipeline, 41-first end, 42-second end, 43-sixth opening and closing device, 431-sixth manual valve, 44-fourth pressure detection device, 50-third pipeline, 51-third end, 52-fourth end, 53-seventh opening and closing device, 531-seventh manual valve, 532-eighth manual valve, 533-ninth manual valve, 60-fourth pipeline, 61-air inlet end, 62-air outlet end, 63-eighth opening and closing device, 631-fifth pneumatic valve, 70-power transmission device, 71-shielded pump. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0030] The present application provides a liquid carbon dioxide transfer system and method, which are described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0031] Liquid carbon dioxide is usually stored in tanks or containers at high pressure. Transferring can transfer carbon dioxide from one tank or container to another tank, container or transportation equipment for better storage, transportation and distribution of liquid carbon dioxide. However, in the initial stage of transfer of liquid carbon dioxide, due to the low pressure in the transfer pipeline, if the pressure in the pipeline is lower than a certain value, liquid carbon dioxide is easily converted into solid carbon dioxide and then blocks the transfer pipeline, thus affecting the transfer process of liquid carbon dioxide.

[0032] In view of this, an embodiment of the present application provides a liquid carbon dioxide transfer system. During the process of pressurizing the second pipeline by the first storage device or the second storage device, the first pipeline is connected to the second pipeline through the third pipeline to complete the pressurization of the first pipeline. The present application pressurizes the first pipeline and the second pipeline so that the environment of the liquid carbon dioxide transmission pipeline satisfies the state of carbon dioxide maintaining liquid carbon dioxide, thereby avoiding the phase change of liquid carbon dioxide affecting the transfer process of liquid carbon dioxide. And the synchronous charging of the first pipeline and the second pipeline through the third pipeline shortens the charging time, making the pipeline charging link more convenient.

[0033] See also Figure 1 , Figure 1 A schematic diagram of a liquid carbon dioxide transfer system provided in an embodiment of the present application. The embodiment of the present application provides a liquid carbon dioxide transfer system, which includes: a first pipeline 30, the first pipeline 30 has a liquid inlet end 31 and a liquid outlet end 32, the liquid inlet end 31 is connected to the first storage device 10, and the liquid outlet end 32 is connected to the second storage device 20; a second pipeline 40, the second pipeline 40 has a first end 41 and a second end 42, the first end 41 is connected to the second storage device 20, and the second end 42 is connected to the first storage device 10; wherein the first pipeline 30 is connected to the second pipeline 40 through a third pipeline 50; during the process of the first storage device 10 or the second storage device 20 pressurizing the second pipeline 40, the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50 to complete the pressurization of the first pipeline 30.

[0034] That is, in some embodiments, during the process of the first storage device 10 charging the second pipeline 40 , the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50 to complete the charging of the first pipeline 30 .

[0035] In some embodiments, during the process of the second storage device 20 charging the second pipeline 40 , the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50 to complete the charging of the first pipeline 30 .

[0036] Illustratively, in some embodiments, the first storage device 10 has a first gas phase end 111 and a first liquid phase end 112, the first gas phase end 111 is connected to the second end 42, and the first liquid phase end 112 is connected to the liquid inlet end 31; the second storage device 20 has a second gas phase end 211 and a second liquid phase end 212, the second gas phase end 211 is connected to the first end 41, and the second liquid phase end 212 is connected to the liquid outlet end 32; the third pipeline has a third end 51 and a fourth end 52, the third end 51 is connected to the first pipeline 30 and is connected between the liquid inlet end 31 and the liquid outlet end 32, and the fourth end 52 is connected to the second pipeline 40 and is connected between the first end 41 and the second end 42. Among them, the first storage device 10 is used to store liquid carbon dioxide, and the second storage device 20 is used to receive liquid carbon dioxide transferred from the first storage device 10 through the first pipeline 30. The second storage device 20 contains a small amount of liquid carbon dioxide to maintain the low temperature state in the device. The first storage device 10 and the second storage device 20 have a pressure and temperature to maintain the state of liquid carbon dioxide, and contain gaseous carbon dioxide. In some embodiments, the pressure range in the first storage device 10 can be 13bar~15bar, and the temperature range can be -35℃~-32℃. Specifically, when the pressure in the first storage device 10 is 13bar, the temperature is -35℃, and when the pressure in the first storage device 10 is 15bar, the temperature is -32℃, and so on. As the pressure increases, the temperature also increases accordingly. Specifically, during the process of pressurizing the second pipeline 40 by the first storage device 10, the first storage device 10 is connected with the second end 42 through the first gas phase end 111, the first liquid phase end 112 is not connected with the liquid inlet end 31, the second gas phase end 211 is not connected with the first end 41, the second liquid phase end 212 is not connected with the liquid outlet end 32, the third end 51 is connected with the first pipeline 30, and the fourth end 52 is connected with the second pipeline 40, and the gaseous carbon dioxide in the first storage device 10 is filled into the second pipeline 40. At this time, the first pipeline 30 is connected with the second pipeline 40 through the third pipeline 50, and the gaseous carbon dioxide is filled into the first pipeline 30 through the third pipeline 50, and then the first pipeline 30 is pressurized at the same time.

[0037] During the process of pressurizing the second pipeline 40 by the second storage device 20, the second storage device 20 is connected to the first end 41 through the second gas phase end 211, the first gas phase end 111 is not connected to the second end 42, the first liquid phase end 112 is not connected to the liquid inlet end 31, the second liquid phase end 212 is not connected to the liquid outlet end 32, the third end 51 is connected to the first pipeline 30, and the fourth end 52 is connected to the second pipeline 40, and the gaseous carbon dioxide in the second storage device 20 is filled into the second pipeline 40. At this time, the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50, and the gaseous carbon dioxide is filled into the first pipeline 30 through the third pipeline 50, and the first pipeline 30 is pressurized at the same time.

[0038] In some embodiments, the third pipeline 50 is a metal connecting pipe. Metal pipelines generally have high strength and pressure resistance and can withstand high pressure and load. In particular, when the liquid carbon dioxide and gaseous carbon dioxide are high-pressure gas and liquid, the metal pipeline can provide a stable and reliable connection to avoid leakage and system damage.

[0039] It should be understood that the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50, and the pressurization of the first pipeline 30 and the second pipeline 40 is completed, which means that the gaseous carbon dioxide is filled into the pipeline, and the pressure in the pipeline is changed so that the pressure in the pipeline meets the pressure environment maintained by the liquid carbon dioxide state. Furthermore, in some embodiments, after pressurization, the pressure range in the pipeline can be 13 bar to 15 bar, and the temperature range can be -35°C to -32°C.

[0040] Through the above technical solution, the transfer system includes a first pipeline 30, a second pipeline 40, and a third pipeline 50, and the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50; during the process of the first storage device 10 or the second storage device 20 pressurizing the second pipeline 40, the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50 to complete the pressurization of the first pipeline 30. The liquid carbon dioxide transmission pipeline environment satisfies the state of carbon dioxide maintaining liquid carbon dioxide, avoiding the problem of liquid carbon dioxide being converted into solid carbon dioxide and then blocking the pipeline during the transfer process, so that the transfer process of liquid carbon dioxide can operate normally and stably; and the first pipeline 30 and the second pipeline 40 are pressurized synchronously, shortening the pressurization time, and directly pressurizing the pipeline through the first storage device 10 or the second storage device 20, making the pipeline pressurization link more convenient. In addition, since the liquid carbon dioxide is under high pressure, the closed safety of the transfer device needs to be paid attention to during the filling of liquid carbon dioxide. The closedness of the transfer system can be pre-verified by the pressurization method, making the transfer process safer.

[0041] See also Figure 2 , Figure 2An example structural schematic diagram of a transfer system provided for an embodiment of the present application, in some embodiments, the first pipeline 30 includes a third pressure detection device 34, and the third pressure detection device 34 is connected between the liquid inlet end 31 and the liquid outlet end 32; the second pipeline 40 includes a fourth pressure detection device 44, and the fourth pressure detection device 44 is between the first end 41 and the second end 42. The third pressure detection device 34 is used to detect the pressure in the first pipeline 30, and the fourth pressure detection device 44 is used to detect the pressure in the second pipeline 40.

[0042] In some embodiments, the first storage device 10 includes a first pressure detection device 14, and the second storage device 20 includes a second pressure detection device 24; wherein, during the process of the first storage device 10 or the second storage device 20 charging the second pipeline 40, when the first pressure detection device 14 or the second pressure detection device 24 has the same value as the third pressure detection device 34 and the fourth pressure detection device 44, the charging of the first pipeline 30 is completed.

[0043] Specifically, during the process of the first storage device 10 pressurizing the first pipeline 30 and the second pipeline 40, when the values ​​of the first pressure detection device 14, the third pressure detection device 34, and the fourth pressure detection device 44 are the same, the process of the first storage device 10 pressurizing the first pipeline 30 and the second pipeline 40 is completed, and the first storage device 10 stops pressurizing the first pipeline 30 and the second pipeline 40. When the pressurization stops, the first gas phase end 111 is not connected to the second end 42, the first liquid phase end 112 is not connected to the liquid inlet end 31, the second gas phase end 211 is not connected to the first end 41, and the second liquid phase end 212 is not connected to the liquid outlet end 32.

[0044] During the process of the second storage device 20 pressurizing the first pipeline 30 and the second pipeline 40, when the values ​​of the second pressure detection device 24, the third pressure detection device 34, and the fourth pressure detection device 44 are the same, the process of the second storage device 20 pressurizing the first pipeline 30 and the second pipeline 40 is completed, and the second storage device 20 stops pressurizing the first pipeline 30 and the second pipeline 40. When the pressurization stops, the first gas phase end 111 is not connected to the second end 42, the first liquid phase end 112 is not connected to the liquid inlet end 31, the second gas phase end 211 is not connected to the first end 41, and the second liquid phase end 212 is not connected to the liquid outlet end 32.

[0045] In some embodiments, the first pressure detection device 14, the second pressure detection device 24, the third pressure detection device 34, and the fourth pressure detection device 44 use pressure gauges to detect the pressure inside the first storage device 10, the second storage device 20, the first pipeline 30, and the second pipeline 40, respectively.

[0046] Through the above technical scheme, the first pressure detection device 14, the second pressure detection device 24, the third pressure detection device 34, and the fourth pressure detection device 44 are used to judge whether the pressurization of the first pipeline 30 and the second pipeline 40 is completed during the pressurization process, thereby avoiding the situation where the pressurization time is short and the pressure in the pipeline cannot reach the condition for maintaining the liquid carbon dioxide state, or the storage device and the first pipeline 30 and the second pipeline 40 have reached pressure balance but the pressurization process has not been stopped, resulting in a long pressurization time, which affects the efficiency of the liquid carbon dioxide transfer; in addition, the first pressure detection device 14, the second pressure detection device 24, the third pressure detection device 34, and the fourth pressure detection device 44 can also better monitor the pressure inside the first pipeline 30 and the second pipeline 40, the first storage device 10 and the second storage device 20, thereby avoiding the internal pressure exceeding the pressure bearing value of each device and causing damage to the device; and the sealing of the pipeline and the storage device can also be monitored, making the transfer system safer.

[0047] See also Figure 3 , Figure 3 Another example structural diagram of the transfer system provided in the embodiments of the present application. In some embodiments, the first storage device 10 includes a first opening and closing device 12, a second opening and closing device 13, and a storage tank 11, the storage tank 11 has a first gas phase end 111 and a first liquid phase end 112, one end of the first opening and closing device 12 is connected to the first liquid phase end 112, the other end of the first opening and closing device 12 is connected to the liquid inlet end 31, one end of the second opening and closing device 13 is connected to the first gas phase end 111, and the other end of the second opening and closing device 13 is connected to the second end 42.

[0048] Specifically, the first opening and closing device 12 and the second opening and closing device 13 are used to control the connection and isolation of the pipeline. During the process of the first storage device 10 pressurizing the first pipeline 30 and the second pipeline 40, the first gas phase end 111 of the storage tank 11 is connected to the second end 42 through the second opening and closing device 13, the first liquid phase end 112 of the storage tank 11 and the liquid inlet end 31 are disconnected by the first opening and closing device 12, the second gas phase end 211 is disconnected from the first end 41, the second liquid phase end 212 is disconnected from the liquid outlet end 32, and the first pipeline 30 and the second pipeline 40 are connected; the gaseous carbon dioxide in the first storage device 10 is filled into the second pipeline 40, and at this time the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50, then the gaseous carbon dioxide is filled into the first pipeline 30 through the third pipeline 50, and then the first pipeline 30 is pressurized at the same time.

[0049] During the process of pressurizing the second pipeline 40 by the second storage device 20, the second storage device 20 is connected to the first end 41 through the second gas phase end 211, the first gas phase end 111 of the storage tank 11 is disconnected from the second end 42 by the second opening and closing device 13, the first liquid phase end 112 of the storage tank 11 is disconnected from the liquid inlet end 31 by the first opening and closing device 12, the second liquid phase end 212 is disconnected from the liquid outlet end 32, and the first pipeline 30 is connected to the second pipeline 40; the gaseous carbon dioxide in the second storage device 20 is filled into the second pipeline 40, and at this time the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50, then the gaseous carbon dioxide is filled into the first pipeline 30 through the third pipeline 50, and then the first pipeline 30 is pressurized at the same time.

[0050] In some embodiments, the first opening and closing device 12 and the second opening and closing device 13 both include valves to control the connection and isolation of the pipeline.

[0051] Through the above technical scheme, the connection and isolation between the first liquid phase end 112 and the liquid inlet end 31 and the connection and isolation between the first gas phase end 111 and the second end 42 can be controlled by the first opening and closing device 12 and the second opening and closing device 13; the second liquid phase end 212 is connected and isolated with the liquid outlet end 32, which can prevent liquid carbon dioxide from flowing into the pipeline during the pressurization process, and can control the flow rate of gaseous carbon dioxide in the pipeline during the pressurization process, which helps to maintain the balance of the system and ensure the stability and effectiveness of the pressurization process.

[0052] In some embodiments, the second storage device 20 includes a third opening and closing device 22, a fourth opening and closing device 23, and a receiving tank 21, the receiving tank 21 has a second gas phase end 211 and a second liquid phase end 212, one end of the third opening and closing device 22 is connected to the second liquid phase end 212, the other end of the third opening and closing device 22 is connected to the liquid outlet end 32, one end of the fourth opening and closing device 23 is connected to the second gas phase end 211, and the other end of the fourth opening and closing device 23 is connected to the first end 41.

[0053] Specifically, the third opening and closing device 22 and the fourth opening and closing device 23 are used to control the connection and isolation of the pipeline. During the process of the first storage device 10 pressurizing the first pipeline 30 and the second pipeline 40, the first storage device 10 is connected to the second end 42 through the first gas phase end 111, and the first liquid phase end 112 is not connected to the liquid inlet end 31. The second gas phase end 211 of the receiving tank 21 is not connected to the first end 41 through the fourth opening and closing device 23, and the second liquid phase end 212 of the receiving tank 21 is not connected to the liquid outlet end 32 through the third opening and closing device 22, and the first pipeline 30 is connected to the second pipeline 40; then the gaseous carbon dioxide in the first storage device 10 is filled into the second pipeline 40, and at this time, the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50, and the gaseous carbon dioxide is filled into the first pipeline 30 through the third pipeline 50, and then the first pipeline 30 is pressurized at the same time.

[0054] During the process of pressurizing the second pipeline 40 by the second storage device 20, the first gas phase end 111 is not connected to the second end 42, the first liquid phase end 112 is not connected to the liquid inlet end 31, the second gas phase end 211 of the receiving tank 21 is connected to the first end 41 through the fourth opening and closing device 23, the second liquid phase end 212 of the receiving tank 21 is not connected to the liquid outlet end 32 through the third opening and closing device 22, and the first pipeline 30 is connected to the second pipeline 40; then, the gaseous carbon dioxide in the second storage device 20 is filled into the second pipeline 40, and at this time, the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50, and the gaseous carbon dioxide is filled into the first pipeline 30 through the third pipeline 50, and then the first pipeline 30 is pressurized at the same time.

[0055] In some embodiments, the fourth opening and closing device 23 controls the connection and isolation between the second gas phase end 211 and the first end 41, the second opening and closing device 13 controls the connection and isolation between the first gas phase end 111 and the second end 42, the first opening and closing device 12 controls the connection and isolation between the first liquid phase end 112 and the liquid inlet end 31, and the third opening and closing device 22 controls the connection and isolation between the second liquid phase end 212 and the liquid outlet end 32.

[0056] In some embodiments, the third opening and closing device 22 and the fourth opening and closing device 23 both include valves to control the connection and isolation of the pipeline.

[0057] Through the above technical scheme, the connection and isolation between the second gas phase end 211 and the first end 41, the first gas phase end 111 and the second end 42, the first liquid phase end 112 and the liquid inlet end 31, and the second liquid phase end 212 and the liquid outlet end 32 can be controlled by the first opening and closing device 12, the second opening and closing device 13, the third opening and closing device 22, and the fourth opening and closing device 23. On the one hand, it can prevent liquid carbon dioxide from flowing into the pipeline during the pressurization process, and on the other hand, it can control the flow rate of gaseous carbon dioxide in the pipeline during the pressurization process, which helps to maintain the balance of the system and ensure the stability and effectiveness of the pressurization process.

[0058] In some embodiments, the third pipeline 50 includes a seventh opening and closing device 53 , which is connected between the first pipeline 30 and the second pipeline 40 . The seventh opening and closing device 53 is used to control the opening and closing of the third pipeline 50 .

[0059] In some embodiments, the seventh opening and closing device 53 includes a valve to control the connection and isolation of the pipeline.

[0060] Specifically, during the process of the first storage device 10 pressurizing the second pipeline 40, the seventh opening and closing device 53 controls the third pipeline 50 to be connected, and the first pipeline 30 and the second pipeline 40 are connected through the third pipeline 50, and the gaseous carbon dioxide is filled into the first pipeline 30 through the third pipeline 50, thereby completing the pressurization of the first pipeline 30 at the same time.

[0061] During the process of pressurizing the second pipeline 40 by the second storage device 20, the seventh opening and closing device 53 controls the connection of the third pipeline 50, and injects the gaseous carbon dioxide in the second storage device 20 into the second pipeline 40. At this time, the first pipeline 30 is connected with the second pipeline 40 through the third pipeline 50, and the gaseous carbon dioxide is injected into the first pipeline 30 through the third pipeline 50, thereby completing the pressurization of the first pipeline 30 at the same time.

[0062] Through the above technical solution, the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50; during the process of the first storage device 10 or the second storage device 20 pressurizing the second pipeline 40, the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50 to complete the pressurization of the first pipeline 30. The liquid carbon dioxide transmission pipeline environment satisfies the state of carbon dioxide maintaining liquid carbon dioxide, avoids the blockage caused by the conversion of liquid carbon dioxide into solid carbon dioxide, and avoids the problem of the transfer pipeline during the transfer process; and the first pipeline and the second pipeline are pressurized synchronously, which shortens the pressurization time and makes the pipeline pressurization link more convenient and safe.

[0063] In some embodiments, during the process of filling the second storage device 20 with liquid carbon dioxide from the first storage device 10, the second storage device 20 is used to transmit gaseous carbon dioxide to the first storage device 10 through the second pipeline 40, and the first storage device 10 is used to fill the second storage device 20 with liquid carbon dioxide through the first pipeline 30 to complete the filling of the second storage device 20.

[0064] Specifically, during the process of charging the second storage device 20 with liquid carbon dioxide from the first storage device 10, that is, the liquid carbon dioxide in the storage tank 11 is transferred to the receiving tank 21, the first liquid phase end 112 of the storage tank 11 in the first storage device 10 is connected with the second liquid phase end 212 of the receiving tank 21 in the second storage device 20 through the first pipeline 30, so that the liquid carbon dioxide stored in the storage tank 11 flows into the receiving tank 21 through the first pipeline 30, and the liquid carbon dioxide is transferred from the first storage device 10 to the second storage device 20; during the transfer process, the second gas phase end 211 of the receiving tank 21 is connected with the first gas phase end 111 of the storage tank 11 through the second pipeline 40, so that the gaseous carbon dioxide in the second storage device 20 flows into the first storage device 10 through the second pipeline 40. At this time, the first pipeline 30 and the second pipeline 40 are not connected, that is, the third pipeline 50 separates the first pipeline 30 from the second pipeline 40.

[0065] In some embodiments, during the process of charging liquid carbon dioxide from the first storage device 10 to the second storage device 20, the first opening and closing device 12, the second opening and closing device 13, the third opening and closing device 22, and the fourth opening and closing device 23 control the pipeline connection, and the seventh opening and closing device 53 controls the isolation of the third pipeline 50, thereby isolating the first pipeline 30 and the second pipeline 40; thereby, the first liquid phase end 112 of the first storage device 10 is connected with the second liquid phase end 212 of the second storage device 20 through the first pipeline 30, and the second gas phase end 211 of the second storage device 20 is connected with the first gas phase end 111 of the first storage device 10 through the second pipeline 40, so that the liquid carbon dioxide stored in the first storage device 10 flows into the second storage device 20 through the first pipeline 30, and the gaseous carbon dioxide in the second storage device 20 flows into the first storage device 10 through the second pipeline 40.

[0066] Through the above technical solution, the second pipeline 40 is passed between the first storage device 10 and the second storage device 20, so that the gaseous carbon dioxide in the second storage device 20 flows into the first storage device 10 through the second pipeline 40, and the carbon dioxide gas is recovered, thereby reducing the loss and emission of carbon dioxide during the filling process.

[0067] See also Figure 4 , Figure 4Another exemplary structural diagram of the transfer system provided in the embodiments of the present application. In some embodiments, the liquid carbon dioxide transfer system further includes: a power transmission device 70, the power transmission device 70 is connected between the first liquid phase end 112 and the second liquid phase end 212; during the process of the first storage device 10 filling the second storage device 20 with liquid carbon dioxide, the power transmission device 70 is configured to control the pressure of the fluid in the first pipeline 30.

[0068] In some embodiments, the power transmission device 70 is on the first pipeline 30 , specifically between the liquid inlet end 31 and the liquid outlet end 32 .

[0069] In some embodiments, the power transmission device 70 is on the first storage device 10 , specifically between the first liquid phase end 112 and the liquid inlet end 31 .

[0070] In some embodiments, the power transmission device 70 is on the second storage device 20 , specifically between the second liquid phase end 212 and the liquid outlet end 32 .

[0071] Specifically, the power transmission device 70 is used to provide energy for pressurizing the liquid carbon dioxide to overcome the pipeline resistance. During the process of the first storage device 10 filling the second storage device 20 with liquid carbon dioxide through the first pipeline 30, the power transmission device 70 can adjust the liquid carbon dioxide transfer flow rate.

[0072] In some embodiments, the power transfer device 70 includes a pump device.

[0073] In some embodiments, the first storage device 10 is located at a higher position than the second storage device 20 .

[0074] Through the above technical solution, the power source is provided by the power transmission device 70, the conveying capacity is increased, and it is ensured that the liquid carbon dioxide can be smoothly transferred from the first storage device 10 to the second storage device. And the power transmission device 70 can play a role in regulating the flow and pressure during the transfer of liquid carbon dioxide; through reasonable selection and operation, the flow and pressure of liquid carbon dioxide can be accurately controlled to ensure that the fluid is stable and controlled during the transfer process. And it can speed up the transfer speed of liquid carbon dioxide, improve transportation efficiency, and push the liquid to the target location at a higher speed, thereby reducing the transfer time. Combined with the position of the first storage device 10 being higher than the position of the second storage device 20, the liquid is transported by gravity, and part of the liquid carbon dioxide in the first pipeline 30 flows into the receiving tank under the action of gravity, reducing the consumption of liquid carbon dioxide remaining in the pipeline.

[0075] See also Figure 5 , Figure 5Another exemplary structural diagram of the transfer system provided in the embodiments of the present application. In some embodiments, the liquid carbon dioxide transfer system further includes: a fourth pipeline 60, the fourth pipeline 60 having an air inlet end 61 and an air outlet end 62, the air inlet end 61 is connected to the second pipeline 40, and the air outlet end 62 is connected to the discharge pipeline; wherein, during the pressure relief process of the second pipeline 40 through the fourth pipeline 60 through the discharge pipeline, the first pipeline 30 is connected to the fourth pipeline 60 through the third pipeline 50, the second pipeline 40, and the first pipeline 30 is completed The pipeline 30 is depressurized.

[0076] In some embodiments, the air inlet end 61 of the fourth pipeline 60 is connected between the second opening and closing device 13 and the second end 42 .

[0077] In some embodiments, the inlet end 61 of the fourth pipe 60 is connected between the first end 41 and the second end 42 .

[0078] In some embodiments, the air inlet end 61 of the fourth pipeline 60 is connected between the fourth opening and closing device 23 and the first end 41 .

[0079] In some embodiments, the fourth pipeline 60 includes an eighth opening and closing device 63 , which is between the air inlet end 61 and the air outlet end 62 , and is used to control the on-off of the fourth pipeline 60 .

[0080] Specifically, during the pressure relief process of the second pipeline 40 through the gas outlet 62, the eighth opening and closing device 63 controls the fourth pipeline 60 to be connected, the seventh opening and closing device 53 controls the third pipeline 50 to be connected, and the first opening and closing device 12, the second opening and closing device 13, the third opening and closing device 22, and the fourth opening and closing device 23 control the pipeline isolation; then the fourth pipeline 60 is connected to the second pipeline 40, and the third pipeline 50 is connected to the first pipeline 30 and the second pipeline 40, then the gaseous carbon dioxide in the second pipeline is discharged from the gas outlet 62 through the fourth pipeline 60 through the discharge pipe The carbon dioxide in the first pipeline 30 is discharged from the third pipeline 50 and the second pipeline 40, and the pressure in the second pipeline 40 is reduced. Since the first pipeline 30 and the second pipeline 40 are connected, the gaseous carbon in the first pipeline 30 is discharged from the fourth pipeline 60 through the third pipeline 50 and the second pipeline 40 in sequence. The pressure in the first pipeline 30 is reduced, and the liquid carbon dioxide in the first pipeline 30 is converted into gaseous carbon dioxide and is also discharged with the pressure relief. When the pressure in the first pipeline 30 and the second pipeline 40 reaches normal pressure and the pressure relief is completed, the seventh opening and closing device 53 isolates the third pipeline 50 and the eighth opening and closing device 63 isolates the fourth pipeline 60.

[0081] In some embodiments, after the second pipeline 40 is depressurized through the air outlet 62, the first opening and closing device 12, the second opening and closing device 13, the third opening and closing device 22, the fourth opening and closing device 23, the seventh opening and closing device 53, and the eighth opening and closing device 63 control the pipeline isolation.

[0082] It should be understood that the first pipeline 30 is connected with the fourth pipeline 60 through the third pipeline 50 and the second pipeline 40 to complete the pressure relief of the first pipeline 30 and the second pipeline 40, which means that the gaseous carbon dioxide in the first pipeline 30 and the second pipeline 40 is discharged through the fourth pipeline 60 through the discharge pipeline. The discharge pipeline can discharge the gaseous carbon dioxide into the environment where the transfer system is located, reducing the pressure of the first pipeline 30 and the second pipeline 40. In the pressure relief process, the pressure of the liquid carbon dioxide in the first pipeline 30 is reduced due to the connection of the fourth pipeline, and the liquid carbon dioxide in the first pipeline 30 is converted into gaseous carbon dioxide, and then the pressure relief process is to discharge the gaseous carbon dioxide in the first pipeline 30 and the second pipeline 40 through the fourth pipeline 60. The specific connection position of the fourth pipeline 60 and the second pipeline 40 is related to the pressure relief and discharge position of the gaseous carbon dioxide.

[0083] In some embodiments, the eighth opening and closing device 63 includes a valve to control the connection and isolation of the pipeline.

[0084] Through the above technical solution, the pressure in the first pipeline 30 and the second pipeline 40 is relieved by connecting the third pipeline 50 and the fourth pipeline 60, and the high-pressure liquid carbon dioxide and gaseous carbon dioxide in the pipeline are released, ensuring the safety of the pipeline when disconnected. In addition, during the liquid carbon dioxide transfer process, the high pressure accumulated in the pipeline may cause pipeline rupture, leakage or other safety accidents. By reducing the pressure, the pressure inside the pipeline can be reduced, the risk of accidents caused by excessive pressure can be reduced, and the safety of the transfer process can be improved; and by the pressure relief operation, the pressure in the pipeline can be reduced to reduce the possibility of leakage. In addition, excessive pressure can cause damage to the equipment and valves in the transfer pipeline system. By regularly releasing the pressure, the pressure shock in the pipeline can be reduced, the load on the equipment can be reduced, the life of the equipment can be extended, and the pipeline and related equipment can be protected from damage. At the same time, by relieving the pressure of the transfer pipeline, the pressure in the pipeline can be reduced, so that the liquid carbon dioxide can flow more smoothly during the transfer process. Reducing the pressure accumulation in the pipeline helps to reduce the resistance of the fluid, improve the efficiency and fluidity of the transfer process, and thus speed up the transfer speed.

[0085] See also Figure 6 , Figure 6Another example structural diagram of the transfer system provided in the embodiment of the present application. It should be understood that although the first storage device 10 and the second storage device 20 both include opening and closing devices, in order to ensure the stability of the flow rate during the transfer process and avoid excessive or excessive flow changes, it is necessary to add additional opening and closing devices to the first pipeline and the second pipeline; in addition, the additional opening and closing device can provide a convenient interface for maintenance, overhaul or replacement of other components of the storage tank or transfer pipeline. By closing the valve, the connection between the storage tank and the pipeline can be safely cut off, and necessary maintenance work can be performed. Furthermore, the first pipeline 30 includes a fifth opening and closing device 33, and the fifth opening and closing device 33 is between the liquid inlet end 31 and the liquid outlet end 32; the second pipeline 40 includes a sixth opening and closing device 43, and the sixth opening and closing device 43 is between the third end 51 and the fourth end 52.

[0086] In some embodiments, the fifth opening and closing device 33 includes a valve to control the connection and isolation of the pipeline; the sixth opening and closing device 43 includes a valve to control the connection and isolation of the pipeline.

[0087] In summary, although the tanks already have valves, adding additional valves plays a role in controlling flow, providing safety protection and maintenance during the transfer process to ensure the smooth progress of the transfer process and ensure safe operation.

[0088] In some embodiments, the first opening and closing device 12 includes a first pneumatic valve 121 and a first manual valve 122, the second opening and closing device 13 includes a second pneumatic valve 131 and a second manual valve 132, the third opening and closing device 22 includes a third pneumatic valve 221 and a third manual valve 222, the fourth opening and closing device 23 includes a fourth pneumatic valve 231 and a fourth manual valve 232, the fifth opening and closing device 33 includes a fifth manual valve 331, the power transmission device 70 includes a shielded pump 71, the sixth opening and closing device 43 includes a sixth manual valve 431, the seventh opening and closing device 53 includes a seventh manual valve 531, an eighth manual valve 532, and a ninth manual valve 533, and the eighth opening and closing device 63 includes a fifth pneumatic valve 631; the first liquid phase end 112 of the storage tank 11 is directed toward the second liquid phase end 212 of the receiving tank 21, and the first pneumatic valve 121, the shielded pump 71, the first manual valve 122, the fifth manual valve 331 are sequentially connected on the pipeline. the fourth pneumatic valve 231, the fourth manual valve 232, the ninth manual valve 533, the sixth manual valve 431, the second manual valve 132, and the second pneumatic valve 131 are sequentially connected on the pipeline; the eighth manual valve 532 of the third pipeline 50 is between the seventh manual valve 531 and the ninth manual valve 533, the air inlet end 61 of the fourth pipeline 60 and the second pipeline 40 are connected between the sixth manual valve 431 and the second manual valve 132, the fifth pneumatic valve 631 is between the air inlet end 61 and the air outlet end 62, the third pressure detection device 34 is connected between the fifth manual valve 331 and the seventh manual valve 531, and the fourth pressure detection device 44 is connected between the sixth manual valve 431 and the ninth manual valve 533. Based on the application in the transfer of liquid carbon dioxide on ships, the fourth pipeline 60 discharges gaseous carbon dioxide through the discharge pipeline, and the discharge pipeline can discharge the gaseous carbon dioxide into the environment through a chimney.

[0089] Specifically, take the first storage device 10 charging the second pipeline 40 and the first pipeline 30 as an example, that is, the second pipeline 40 and the first pipeline 30 are charged through the storage tank 11. First, the seventh manual valve 531, the eighth manual valve 532, the ninth manual valve 533, the fifth manual valve 331, the first manual valve 122, the sixth manual valve 431, and the second manual valve 132 are opened, and the first pneumatic valve 121, the third manual valve 222, the fourth manual valve 232, the fifth pneumatic valve 631, and the shielded pump 71 are closed, and then the second pneumatic valve 131 is opened, and the pressure values ​​of the first pressure detection device 14, the third pressure detection device 34, and the fourth pressure detection device 44 are monitored. After the pressure values ​​of the first pressure detection device 14, the third pressure detection device 34, and the fourth pressure detection device 44 are consistent, the first storage device 10 is used to charge the second pipeline 40 and the first pipeline 30, and the second pneumatic valve 131 is closed. At this time, if the pressure values ​​of the third pressure detection device 34 and the fourth pressure detection device 44 remain unchanged within the first preset time period, the first pipeline 30 and the second pipeline 40 have good air tightness, and then the eighth manual valve 532 is closed.

[0090] It should be understood that by closing the third manual valve 222 and the fourth manual valve 232 , the third pneumatic valve 221 and the fourth pneumatic valve 231 can be opened or closed.

[0091] Take the example of the first storage device 10 filling the second storage device 20 with liquid carbon dioxide through the first pipeline 30, that is, the storage tank 11 fills the receiving tank 21 with liquid carbon dioxide through the first pipeline 30. Close the fifth pneumatic valve 631 and the eighth manual valve 532, open the first pneumatic valve 121, the first manual valve 122, the second pneumatic valve 131, the second manual valve 132, the third pneumatic valve 221, the third manual valve 222, the fourth pneumatic valve 231, the fourth manual valve 232, the fifth manual valve 331, the sixth manual valve 431, the seventh manual valve 531, and the ninth manual valve 533, then open the shielded pump 71 and adjust the shielded pump frequency according to the transfer flow requirement, monitor the liquid level indications of the storage tank 11 and the receiving tank 21, and when the liquid level of the receiving tank 21 reaches the specified filling height, or the storage tank After the liquid level 11 drops to the specified height, the shielded pump 71 and the first pneumatic valve 121 are closed, and then the fourth manual valve 232, the second pneumatic valve 131, and the second manual valve 132 are closed. Based on the fact that the position of the first storage device 10 is higher than the position of the second storage device 20, that is, the position of the storage tank 11 is higher than the position of the receiving tank 21, part of the liquid carbon dioxide in the first pipeline 30 flows into the second storage device 20 under the action of gravity. After waiting for the second preset time, the second manual valve 132 is closed to complete the filling of liquid carbon dioxide from the first storage device 10 to the second storage device 20 through the first pipeline 30.

[0092] Take the pressure relief of the first pipeline 30 and the second pipeline 40 through the fourth pipeline 60 as an example. Close the shielded pump 71, the first pneumatic valve 121, the second pneumatic valve 131, the second manual valve 132, the third manual valve 222, and the fourth manual valve 232, open the first manual valve 122, the fifth manual valve 331, the sixth manual valve 431, the seventh manual valve 531, and the ninth manual valve 533, and then open the fifth pneumatic valve 631, and finally the eighth manual valve 532 is slowly opened and adjusted to a suitable opening to enter the pressure relief state. Observe the pressure values ​​of the third pressure detection device 34 and the fourth pressure detection device 44 until the pressure values ​​of the third pressure detection device 34 and the fourth pressure detection device 44 reach normal pressure, close the fifth pneumatic valve 631 and all manual valves, and complete the pressure relief of the first pipeline 30 and the second pipeline 40 through the fourth pipeline 60. If the first storage device 10 is completed to fill the second storage device 20 with liquid carbon dioxide through the first pipeline 30, then after the pressure relief, disconnect all pipeline connections, and the transfer of liquid carbon dioxide is completed.

[0093] It should be understood that the first storage device 10 further includes: a first liquid level sensor 16 for monitoring the liquid level of the liquid carbon dioxide inside the first storage device 10, and a first safety valve 17 for preventing the internal pressure of the first storage device 10 from exceeding a specified value, and the second storage device 20 includes: a second liquid level sensor 26 for monitoring the liquid level of the liquid carbon dioxide inside the second storage device 20, and a second safety valve 27 for preventing the internal pressure of the second storage device 20 from exceeding a specified value. During the liquid carbon dioxide filling process, the first pipeline 30 includes a hose section and an insulation layer for transferring liquid carbon dioxide; the second pipeline 40 includes a hose section for balancing the pressure between the first storage device 10 and the second storage device 20.

[0094] Through the above technical scheme, the present application designs a liquid carbon dioxide transfer system based on the characteristics of the carbon dioxide working fluid. The system adds a second pipeline 40, that is, a gas-phase connecting pipe, between the first storage device 10 and the second storage device 20. The gas-phase connecting pipe guides the gaseous carbon dioxide from the second storage device 20 back to the first storage device, which helps to improve resource utilization efficiency and greatly reduce the emission and waste of carbon dioxide during the transfer process; by adding a third pipeline 50 between the first pipeline 30 and the second pipeline 40, that is, adding a metal connecting pipe to the liquid-phase connecting pipe and the gas-phase connecting pipe, the pressurization and pressure relief links of the transfer process are made safer and more convenient, and the carbon dioxide generated by the pressure relief is discharged, thereby reducing the preparation time for carbon dioxide transfer and the risk of carbon dioxide accumulation.

[0095] Accordingly, the present application also provides a liquid carbon dioxide transfer method, which is applied to the liquid carbon dioxide transfer system of the above embodiment. Figure 7 , Figure 7A schematic diagram of a process flow of a liquid carbon dioxide transfer method provided in an embodiment of the present application. The liquid carbon dioxide transfer method in an embodiment of the present application specifically includes:

[0096] During the process of the first storage device 10 or the second storage device 20 charging the second pipeline 40 , the first pipeline 30 is connected to the second pipeline 40 through the third pipeline 50 to complete the charging of the first pipeline 30 .

[0097] In some embodiments, during the process of filling the second storage device 20 with liquid carbon dioxide from the first storage device 10, the second storage device 20 is used to transmit gaseous carbon dioxide to the first storage device 10 through the second pipeline 40, and the first storage device 10 is used to fill the second storage device 20 with liquid carbon dioxide through the first pipeline 30 to complete the filling of the second storage device 20.

[0098] In some embodiments, during the process of the second pipeline 40 being depressurized through the fourth pipeline 60 via the discharge pipeline, the first pipeline 30 is connected to the fourth pipeline 60 through the third pipeline 50 , the second pipeline 40 , and the first pipeline 30 to complete the depressurization of the first pipeline 30 .

[0099] Specifically, first, the first pipeline 30 and the second pipeline 40 are connected through the third pipeline 50, the fourth pipeline 60 is cut off from the connection with the second pipeline, and then the second pipeline 40 is connected with the first storage device 10 or the second storage device 20, so as to charge the first pipeline 30 and the second pipeline 40 through the first storage device 10 or the second storage device 20;

[0100] Then, the third pipeline 50 is made to cut off the communication between the first pipeline 30 and the second pipeline 40, and then the first pipeline 30 is made to communicate with the first storage device 10 and the second storage device 20 respectively, and the second pipeline 40 is made to communicate with the first storage device 10 and the second storage device 20 respectively, so as to transfer the liquid carbon dioxide in the first storage device 10 to the second storage device 20 through the first pipeline 30, and transfer the gaseous carbon dioxide in the second storage device 20 to the first storage device 10 through the second pipeline 40;

[0101] Finally, the first pipeline 30 is isolated from the first storage device 10 and the second storage device 20, the second pipeline 40 is isolated from the first storage device 10 and the second storage device 20, the fourth pipeline 60 is connected to the second pipeline, and the third pipeline 50 is connected to the first pipeline 30 and the second pipeline 40 to relieve the pressure of the first pipeline 30 and the second pipeline 40; finally, the transfer of liquid carbon dioxide from the first storage device 10 to the second storage device 20 is completed.

[0102] For example, the liquid carbon dioxide transfer system and transfer method of the embodiments of the present application can be applied to the transportation and transfer of liquid carbon dioxide by ships.

[0103] It can be understood that during the process of the transfer system charging the first pipeline and the second pipeline by the first storage device or the second storage device, the first pipeline is connected to the second pipeline through the third pipeline to complete the charging of the first pipeline. The pressure environment of the liquid carbon dioxide transmission pipeline meets the state of carbon dioxide maintaining liquid carbon dioxide, avoiding the problem of liquid carbon dioxide being converted into solid carbon dioxide and blocking the transfer pipeline during the transfer process; and the first pipeline and the second pipeline are pressurized synchronously, shortening the pressurization time, making the pipeline pressurization link more convenient and safer; during the process of the transfer system filling the second storage device with liquid carbon dioxide from the first storage device, the first storage device and the second storage device are connected through the second pipeline, so that the gaseous carbon dioxide in the second storage device is guided back to the first storage device, greatly reducing the loss of liquid carbon dioxide during the filling process. During the process of depressurizing the first pipeline and the second pipeline, the transfer system discharges to the outside through the fourth pipeline, and connects the first pipeline and the second pipeline through the third pipeline, so that the first pipeline and the second pipeline are depressurized synchronously, making the pipeline system depressurization link more convenient and safe.

[0104] The above is a detailed introduction to a liquid carbon dioxide transfer system and method provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A liquid carbon dioxide transfer system, characterized in that: include: A first pipeline (30), the first pipeline (30) having a liquid inlet end (31) and a liquid outlet end (32), the liquid inlet end (31) being connected to the first storage device (10), and the liquid outlet end (32) being connected to the second storage device (20); a second pipeline (40), the second pipeline (40) having a first end (41) and a second end (42), the first end (41) being connected to the second storage device (20), and the second end (42) being connected to the first storage device (10); The first pipeline (30) is connected to the second pipeline (40) via a third pipeline (50); during the process of the first storage device (10) or the second storage device (20) charging the second pipeline (40), the first pipeline (30) is connected to the second pipeline (40) via the third pipeline (50) to complete the charging of the first pipeline (30).

2. A liquid carbon dioxide transfer system according to claim 1, characterized in that: During the process of charging the second storage device (20) with liquid carbon dioxide from the first storage device (10), the second storage device (20) is used to transmit gaseous carbon dioxide to the first storage device (10) through the second pipeline (40), and the first storage device (10) is used to charge the second storage device (20) with liquid carbon dioxide through the first pipeline (30), so as to complete the charging of the second storage device (20).

3. A liquid carbon dioxide transfer system according to claim 2, characterized in that: The first storage device (10) comprises a first opening and closing device (12), a second opening and closing device (13), and a storage tank (11); the storage tank (11) has a first gas phase end (111) and a first liquid phase end (112); one end of the first opening and closing device (12) is connected to the first liquid phase end (112); the other end of the first opening and closing device (12) is connected to the liquid inlet end (31); one end of the second opening and closing device (13) is connected to the first gas phase end (111); and the other end of the second opening and closing device (13) is connected to the second end (42).

4. A liquid carbon dioxide transfer system according to claim 3, characterized in that: The second storage device (20) comprises a third opening and closing device (22), a fourth opening and closing device (23), and a receiving tank (21); the receiving tank (21) has a second gas phase end (211) and a second liquid phase end (212); one end of the third opening and closing device (22) is connected to the second liquid phase end (212); the other end of the third opening and closing device (22) is connected to the liquid outlet end (32); one end of the fourth opening and closing device (23) is connected to the second gas phase end (211); and the other end of the fourth opening and closing device (23) is connected to the first end (41).

5. A liquid carbon dioxide transfer system according to claim 4, characterized in that: Also includes: a power transmission device (70), the power transmission device (70) being connected between the first liquid phase end (112) and the second liquid phase end (212); During the process of charging the second storage device (20) with liquid carbon dioxide from the first storage device (10), the power transmission device (70) is configured to control the pressure of the fluid in the first pipeline (30).

6. A liquid carbon dioxide transfer system according to claim 1, characterized in that: Also includes: a fourth pipeline (60), the fourth pipeline (60) having an air inlet end (61) and an air outlet end (62), the air inlet end (61) being connected to the second pipeline (40), and the air outlet end (62) being connected to the exhaust pipeline; In the process of the second pipeline (40) relieving pressure through the fourth pipeline (60) and then through the discharge pipeline, the first pipeline (30) is connected to the fourth pipeline (60) through the third pipeline (50) and the second pipeline (40) to complete the pressure relief of the first pipeline (30).

7. A liquid carbon dioxide transfer system according to claim 6, characterized in that: The fourth pipeline (60) comprises an eighth opening and closing device (63), wherein the eighth opening and closing device (63) is between the air inlet end (61) and the air outlet end (62), and the eighth opening and closing device (63) is used to control the opening and closing of the fourth pipeline (60).

8. A liquid carbon dioxide transfer system according to claim 1, characterized in that: The third pipeline (50) comprises a seventh opening and closing device (53), the seventh opening and closing device (53) being connected between the first pipeline (30) and the second pipeline (40), and the seventh opening and closing device (53) being used to control the opening and closing of the third pipeline (50).

9. A liquid carbon dioxide transfer system according to claim 1, characterized in that: The first storage device (10) is located at a higher position than the second storage device (20).

10. A liquid carbon dioxide transfer system according to claim 1, characterized in that: The first pipeline (30) comprises a third pressure detection device (34), and the third pressure detection device (34) is connected between the liquid inlet end (31) and the liquid outlet end (32); the second pipeline (40) comprises a fourth pressure detection device (44), and the fourth pressure detection device (44) is between the first end (41) and the second end (42); the third pressure detection device (34) is used to detect the pressure in the first pipeline (30), and the fourth pressure detection device (44) is used to detect the pressure in the second pipeline (40).

11. A liquid carbon dioxide transfer system according to claim 10, characterized in that: The first storage device (10) includes a first pressure detection device (14), and the second storage device (20) includes a second pressure detection device (24); Wherein, during the process of the first storage device (10) or the second storage device (20) charging the second pipeline (40), when the first pressure detection device (14) or the second pressure detection device (24) has the same value as the third pressure detection device (34) or the fourth pressure detection device (44), the charging of the first pipeline (30) is completed.

12. A liquid carbon dioxide transfer method, applied to the liquid carbon dioxide transfer system as claimed in any one of claims 1 to 11, characterized in that: During the process of the first storage device (10) or the second storage device (20) charging the second pipeline (40), the first pipeline (30) is connected to the second pipeline (40) through the third pipeline (50) to complete the charging of the first pipeline (30).

13. A liquid carbon dioxide transfer method according to claim 12, characterized in that: During the process of charging the second storage device (20) with liquid carbon dioxide from the first storage device (10), the second storage device (20) is used to transmit gaseous carbon dioxide to the first storage device (10) through the second pipeline (40), and the first storage device (10) is used to charge the second storage device (20) with liquid carbon dioxide through the first pipeline (30), so as to complete the charging of the second storage device (20).

14. A liquid carbon dioxide transfer method according to claim 12, characterized in that: During the process of the second pipeline (40) relieving pressure through the fourth pipeline (60) and then through the discharge pipeline, the first pipeline (30) is connected to the fourth pipeline (60) through the third pipeline (50) and the second pipeline (40) to complete the pressure relief of the first pipeline (30).

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