Ship carbon dioxide recovery system and method and ship

Abstract

The invention discloses a ship carbon dioxide recovery system and method and a ship, and relates to the field of ship transportation. The system comprises a first storage device, a refrigeration device, a spraying device and a control device, the first storage device is used for storing carbon dioxide and comprises a gas outlet port and a liquid inlet port, and the first storage device comprises a first pressure sensor used for monitoring a first pressure value in the first storage device; the refrigeration equipment comprises a first input port and a first output port which are communicated through a first pipeline, the first pipeline is provided with a first valve, the first output port is communicated with the liquid inlet port through a second pipeline, and the second pipeline is provided with a second valve; the spraying device is connected with the second pipeline, located at the end, close to the liquid inlet port, of the second valve and used for spraying liquid carbon dioxide into the first storage device. The control device is connected with the refrigeration device, the first valve and the second valve. The structure is simple and efficient, and the transportation economy of carbon dioxide can be improved.

Description

Technical Field

[0001] The present application relates to the field of ship transportation technology, and in particular to a ship carbon dioxide recovery system, method and ship. Background Art

[0002] As the international community pays more and more attention to greenhouse gas emission reduction, greenhouse gas emission reduction and capture have become a research hotspot in the current shipping industry. With the rise of new technologies such as carbon capture system (CCUS) and synthetic methanol, marine carbon dioxide (CO2) has become an emerging mode of ship transportation. Ships will inevitably fluctuate during transportation, and the ambient temperature in different sea areas will also be different. Affected by the transportation environment, liquid carbon dioxide will continue to flash, resulting in a large amount of waste, affecting the economic efficiency of ship transportation of carbon dioxide. Therefore, it is urgent to provide a simple and efficient ship carbon dioxide recovery system to adapt to various types of ships, reduce the leakage of carbon dioxide during ship transportation, and improve transportation economy. Summary of the invention

[0003] The embodiments of the present application provide a ship carbon dioxide recovery system, method and ship to simplify the system structure, efficiently recover flash evaporated carbon dioxide, and improve the adaptability and economy of transportation.

[0004] In a first aspect, a ship carbon dioxide recovery system is provided, comprising:

[0005] a first storage device, the first storage device comprising a gas outlet port and a liquid inlet port, the first storage device being used to store carbon dioxide to be transported, the first storage device comprising a first pressure sensor, the first pressure sensor being used to monitor a first pressure value in the first storage device;

[0006] A refrigeration device, the refrigeration device comprising a first input port and a first output port, the first input port is connected to the gas outlet port through a first pipeline, a first valve is provided on the first pipeline, the first output port is connected to the liquid inlet port through a second pipeline, a second valve is provided on the second pipeline, and the refrigeration device is used to liquefy gaseous carbon dioxide;

[0007] a spraying device, the spraying device being connected to the second pipeline and being located at one end of the second valve close to the liquid inlet port, the spraying device being used to spray liquid carbon dioxide into the first storage device;

[0008] A control device is connected to the refrigeration device, the first valve and the second valve.

[0009] In some embodiments, a second pressure sensor is further disposed on the first pipeline. The second pressure sensor is located between the first valve and the first input port and is used to monitor a second pressure value in the first pipeline.

[0010] In some embodiments, the refrigeration device includes a refrigeration unit, a second storage device and a carbon dioxide pump, the refrigeration unit, the second storage device and the carbon dioxide pump are respectively connected to the control device, the refrigeration unit includes the first input port and the second output port, the second storage device includes the second input port and the third output port, the carbon dioxide pump includes the third input port and the first output port, the second output port is in communication with the second input port, and the third output port is in communication with the third input port;

[0011] The refrigeration unit is used to liquefy gaseous carbon dioxide into supercooled carbon dioxide, the second storage device is used to store the supercooled carbon dioxide, and the carbon dioxide pump is used to pump the supercooled carbon dioxide.

[0012] In some embodiments, the first storage device is a C-shaped tank, and the second storage device is a container capable of containing a cryogenic liquid.

[0013] In some embodiments, the storage device further includes a temperature sensor, and the temperature sensor is used to monitor the temperature inside the first storage device.

[0014] In a second aspect, a ship carbon dioxide recovery method is provided, which is applied to a control device in a ship carbon dioxide recovery system as described in any one of the first aspects; the method comprises:

[0015] Acquire a first pressure value in a first storage device monitored by a first pressure sensor;

[0016] If the first pressure value is greater than a first threshold pressure, controlling the first valve to open;

[0017] Controlling the refrigeration equipment to start working so as to liquefy the gaseous carbon dioxide in the first storage device;

[0018] The refrigeration device is controlled to start pumping liquid carbon dioxide, and the second valve is controlled to open so as to spray the liquid carbon dioxide into the first storage device through the spraying device.

[0019] In some embodiments, controlling the refrigeration equipment to start working includes:

[0020] Acquire a second pressure value in the first pipeline monitored by a second pressure sensor;

[0021] If the second pressure value is greater than or equal to a second threshold pressure, the refrigeration device is controlled to start working.

[0022] In some embodiments, controlling the refrigeration device to start pumping liquid carbon dioxide and controlling the second valve to open includes:

[0023] If the liquid level in the second storage device reaches the threshold liquid level, and the difference between the third pressure value in the second storage device and the first pressure value is less than the third threshold pressure, the carbon dioxide pump is controlled to start pumping liquid carbon dioxide, and the second valve is controlled to open.

[0024] In some embodiments, the method further comprises:

[0025] If the first pressure value is less than or equal to the first threshold pressure, the refrigeration unit is controlled to stop working, and the first valve and the second valve are controlled to be closed.

[0026] In some embodiments, the method further comprises:

[0027] After the liquid carbon dioxide in the second storage device is converted to a supercritical state, if the first pressure value is less than the second threshold pressure, the second valve is controlled to open so as to spray the supercritical carbon dioxide in the second storage device into the first storage device;

[0028] When the first pressure value is equal to the first threshold pressure, the second valve is closed.

[0029] In some embodiments, controlling the second valve to open includes:

[0030] Setting the opening of the second valve to an initial value;

[0031] The opening of the second valve is reduced based on the increase of the first pressure value.

[0032] In a third aspect, a ship is provided, comprising a ship carbon dioxide recovery system as described in any one of the first aspects.

[0033] A ship carbon dioxide recovery system of the present application includes: a first storage device, a refrigeration device, a spray device and a control device, the first storage device includes an outlet port and a liquid inlet port, the first storage device is used to store carbon dioxide to be transported, the first storage device includes a first pressure sensor, and the first pressure sensor is used to monitor a first pressure value in the first storage device; the refrigeration device includes a first input port and a first output port, the first input port is connected to the outlet port through a first pipeline, a first valve is arranged on the first pipeline, the first output port is connected to the liquid inlet port through a second pipeline, a second valve is arranged on the second pipeline, and the refrigeration device is used to liquefy gaseous carbon dioxide; the spray device is connected to the second pipeline and is located at one end of the second valve close to the liquid inlet port, and the spray device is used to spray liquid carbon dioxide into the first storage device; the control device is connected to the refrigeration device, the first valve and the second valve. The ship carbon dioxide recovery system provided by the present application can further spray and cool down the gaseous carbon dioxide after liquefaction, so as to reduce the pressure and temperature in the storage tank, thereby realizing zero leakage storage, with a simple and efficient structure, and can also adapt to various types of ships, and improve the transportation economy of carbon dioxide.

[0034] A ship carbon dioxide recovery method of the present application can liquefy gaseous carbon dioxide and supercool it and then further spray it to reduce the temperature, so as to reduce the pressure and temperature in the storage tank, thereby achieving zero leakage storage. The effect is significant and can be applied to various types of ships, thereby greatly improving the transportation economy of carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in 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 only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 This is a schematic diagram of the overall structure of a ship carbon dioxide recovery system according to an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a partial structure of a ship carbon dioxide recovery system according to an embodiment of the present application;

[0038] Figure 3 This is a schematic diagram of the overall process of the ship carbon dioxide recovery method according to an embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of a specific process of the ship carbon dioxide recovery method according to an embodiment of the present application;

[0040] Reference numerals:

[0041] 10-first storage device; 11-first pressure sensor; 101-gas outlet port; 102-liquid inlet port; 20-refrigeration equipment; 21-refrigeration unit; 201-first input port; 203-second output port; 22-second storage device; 204-second input port; 205-third output port; 23-carbon dioxide pump; 206-third input port; 202-first output port; 30-spraying equipment; 40-control equipment; 50-first pipeline; 51-first valve; 52-second pressure sensor; 60-second pipeline; 61-second valve; 70-temperature sensor. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely 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 creative work are within the scope of protection of the present application.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0044] As the ship will inevitably experience fluctuations during transportation and the ambient temperature in different sea areas will also be different, the liquid carbon dioxide will continue to flash due to the influence of the transportation environment. According to statistics, the gas volatilization volume can account for more than 50% of the total transportation volume within 60 days, resulting in a large amount of carbon dioxide waste and affecting the economic efficiency of ship transportation of carbon dioxide.

[0045] In view of this, an embodiment of the present application provides a ship carbon dioxide recovery system to solve at least part of the above technical problems.

[0046] See also Figure 1 , Figure 1It is a schematic diagram of the overall structure of the ship carbon dioxide recovery system of the embodiment of the present application. The ship carbon dioxide recovery system of the embodiment of the present application includes a first storage device 10, a refrigeration device 20, a spray device 30 and a control device 40. The first storage device 10 includes an outlet port 101 and a liquid inlet port 102. The first storage device 10 is used to store carbon dioxide to be transported. The first storage device 10 includes a first pressure sensor 11, and the first pressure sensor 11 is used to monitor the first pressure value in the first storage device 10. Among them, the carbon dioxide to be transported is liquid carbon dioxide. Exemplarily, the transportation pressure of liquid carbon dioxide is generally 15 bar, and the transportation temperature is generally around -28°C (saturated state).

[0047] The refrigeration device 20 includes a first input port 201 and a first output port 202. The first input port 201 is connected to the gas outlet port 101 through a first pipeline 50. The first pipeline 50 is provided with a first valve 51, and the first valve 51 is used to control the on-off of the first pipeline 50. The first output port 202 is connected to the liquid inlet port 102 through a second pipeline 60. The second pipeline 60 is provided with a second valve 61, and the second valve 61 is used to control the on-off of the second pipeline 60. The refrigeration device 20 is used to liquefy gaseous carbon dioxide. The spray device 30 is connected to the second pipeline 60 and is located at one end of the second valve 61 close to the liquid inlet port 102. The spray device 30 is used to spray liquid carbon dioxide into the first storage device 10. The control device 40 is connected to the refrigeration device 20, the first valve 51 and the second valve 61 to control the start and shut down of the refrigeration device 20 and the opening and closing of the first valve 51 and the second valve 61.

[0048] Exemplarily, in the open state, the opening of the first valve 51 and the second valve 61 can generally be 10% to 85%. For example, the opening of the first valve 51 and the second valve 61 can be any one of 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, or any two of the range values.

[0049] Exemplarily, the first storage device 10 is a C-shaped tank, and the second storage device 22 is a container capable of containing cryogenic liquid.

[0050] For example, the first pipeline 50 and the second pipeline 60 may be hoses that can accommodate cryogenic liquids. The medium temperature range that the hoses can accommodate may be ≥-49° C. In this way, the convenience of pipeline connection of the carbon dioxide recovery system can be improved.

[0051] See also Figure 2 , Figure 2The following is a schematic diagram of a partial structure of a ship carbon dioxide recovery system according to an embodiment of the present application. In some examples, the refrigeration device 20 includes a refrigeration unit 21, a second storage device 22, and a carbon dioxide pump 23. The refrigeration unit 21, the second storage device 22, and the carbon dioxide pump 23 are respectively connected to the control device 40. The refrigeration unit 21 includes a first input port 201 and a second output port 203. The second storage device 22 includes a second input port 204 and a third output port 205. The carbon dioxide pump 23 includes a third input port 206 and a first output port 202. The second output port 203 is connected to the second input port 204, and the third output port 205 is connected to the third input port 206.

[0052] The refrigeration unit 21 is used to liquefy gaseous carbon dioxide into supercooled carbon dioxide, the second storage device 22 is used to store supercooled carbon dioxide, and the carbon dioxide pump 23 is used to pump supercooled carbon dioxide. For example, the refrigeration temperature of the refrigeration unit 21 can be -35°C.

[0053] In some examples, the spray device 30 may include a third valve, a spray pipe, a nozzle, and a demister, the third valve is connected to the second pipeline 60, the spray pipe is connected between the third valve and the nozzle, and the demister may be disposed at one end of the nozzle away from the spray pipe. After the third valve of the spray device 30 is opened, the supercooled carbon dioxide may flow from the second pipeline 60 through the spray pipe to the nozzle, and be sprayed out from the nozzle, so as to achieve a more uniform spray cooling effect through the nozzle, and then enter the first storage device 10 after being defogged by the demister, so as to further reduce the temperature and pressure of the first storage device 10, and achieve temperature and pressure stability in the tank.

[0054] For example, the spray device 30 may be disposed in the second pipeline 60, and the liquid inlet port 102 is connected to the first output port 202. Alternatively, one end of the second pipeline 60 may extend into the liquid inlet port 102 for a certain length to achieve the connection between the liquid inlet port 102 and the first output port 202, and the spray device 30 may be disposed at one end of the second pipeline 60, so that the spray device 30 is completely located inside the first storage device 10. The embodiments of the present application do not limit the specific implementation.

[0055] In some examples, a second pressure sensor 52 is further provided on the first pipeline 50, and the second pressure sensor 52 is located between the first valve 51 and the first input port 201, and is used to monitor the second pressure value in the first pipeline 50. In this way, the second pressure sensor 52 can monitor the pre-charge pressure in the first pipeline 50 to prevent the pipeline pressure from being too low during the liquefaction process, resulting in the generation of dry ice, thereby blocking the pipeline.

[0056] In some examples, the storage device further includes a temperature sensor 70 , which is used to monitor the temperature within the first storage device 10 .

[0057] In some examples, a first safety valve SV1 is disposed on the first pipeline 50 , and a second safety valve SV2 is disposed on the second pipeline 60 .

[0058] It can be understood that the ship carbon dioxide recovery system provided in the embodiment of the present application can further spray and cool the gaseous carbon dioxide after liquefaction, so as to reduce the pressure and temperature in the storage tank, thereby achieving zero leakage storage. It has a simple and efficient structure and occupies a small space. Therefore, it can adapt to various types of ships and further improve the transportation economy of carbon dioxide.

[0059] Correspondingly, the embodiment of the present application also provides a ship carbon dioxide recovery method, which is applied to the control device 40 in the ship carbon dioxide recovery system of the embodiment of the present application.

[0060] Please also read Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the overall process of the ship carbon dioxide recovery method according to an embodiment of the present application. Figure 4 This is a schematic diagram of a specific process of the ship carbon dioxide recovery method according to an embodiment of the present application. The ship carbon dioxide recovery method according to an embodiment of the present application comprises the following steps:

[0061] Step 301 : Acquire a first pressure value in a first storage device 10 monitored by a first pressure sensor 11 .

[0062] Specifically, the first pressure sensor 11 can monitor the first pressure value in the first storage device 10 in real time, and the control device 40 is connected to the first pressure sensor 11 to obtain the first pressure value in real time.

[0063] Step 302: If the first pressure value is greater than the first threshold pressure, the first valve 51 is controlled to open.

[0064] In some examples, the first threshold pressure may be 7 bar to 15 bar (bar is a unit of pressure). For example, the first threshold pressure may be any one or two of 7 bar, 8 bar, 9 bar, 10 bar, 11 bar, 12 bar, 13 bar, 14 bar, and 15 bar.

[0065] Exemplarily, the first threshold pressure is 15 bar. When the first pressure value is greater than 15 bar, the temperature is usually minus 28° C.

[0066] Specifically, controlling the first valve 51 means controlling the opening of the first valve 51 to be greater than zero.

[0067] Step 303 : Control the refrigeration device 20 to start working, so as to liquefy the gaseous carbon dioxide in the first storage device 10 .

[0068] Specifically, controlling the refrigeration device 20 to start working specifically means controlling the refrigeration unit 21 in the refrigeration device 20 to start refrigeration work.

[0069] In some embodiments, step 303 may be implemented by:

[0070] Step 1: Obtain a second pressure value in the first pipeline 50 monitored by the second pressure sensor 52.

[0071] Step 2: If the second pressure value is greater than or equal to the second threshold pressure, the refrigeration device 20 is controlled to start working.

[0072] Exemplarily, the second threshold pressure may be set to 7 bar.

[0073] That is, in the embodiment of the present application, after the first valve 51 is opened, the gaseous carbon dioxide in the first storage device 10 pre-charges the first pipeline 50, and after the pre-charge pressure reaches the second threshold pressure, the refrigeration device 20 is started. This can effectively prevent the pipeline pressure from being too low, resulting in dry ice generation and clogging the pipeline.

[0074] Step 304 : Control the refrigeration device 20 to start pumping liquid carbon dioxide, and control the second valve 61 to open, so as to spray the liquid carbon dioxide into the first storage device 10 through the spraying device 30 .

[0075] Specifically, the carbon dioxide pump 23 in the refrigeration device 20 is controlled to start pumping liquid carbon dioxide.

[0076] In some embodiments, step 304 may be implemented by:

[0077] If the liquid level in the second storage device 22 reaches the threshold level, and the difference between the third pressure value and the first pressure value in the second storage device 22 is less than the third threshold pressure, the carbon dioxide pump 23 is controlled to start pumping liquid carbon dioxide, and the second valve 61 is controlled to open.

[0078] Exemplarily, the threshold liquid level may be set to 80% of the maximum liquid level.The third threshold pressure may be set to 5 bar.

[0079] It can be understood that as the liquid level in the second storage device 22 continues to rise, the pressure in the second storage device 22 continues to increase, and the pressure in the first storage device 10 continues to decrease as the gas is transported, so when the difference between the third pressure value in the second storage device 22 and the first pressure value is less than 5 bar, that is, the third pressure value is greater than the first pressure value, and the difference is less than 5 bar, then the carbon dioxide pump 23 can be turned on and the second valve 61 can be turned on. In this way, the abnormality caused by the excessive pressure difference between the first storage device 10 and the second storage device 22 can be avoided.

[0080] As the liquid carbon dioxide is sprayed in, the first pressure value and the temperature of the first storage device 10 will continue to decrease. In some embodiments, the method of the embodiment of the present application may also include:

[0081] If the first pressure value is less than or equal to the first threshold pressure, the refrigeration unit 21 is controlled to stop working, and the first valve 51 and the second valve 61 are controlled to be closed.

[0082] Specifically, when the first pressure value of the first storage device 10 drops to or below the first threshold pressure, the recovery of carbon dioxide is stopped, that is, the refrigeration unit 21, the first valve 51 and the second valve 61 are closed. At this time, some liquid carbon dioxide will remain in the second storage device 22.

[0083] During normal ship transportation, as the temperature and environment change, the pressure in the second storage device 22 will also change. When the liquid carbon dioxide in the second storage device 22 continuously absorbs heat and causes the pressure in the second storage device 22 to reach 8 MPa, the corresponding temperature is usually around 30 degrees Celsius, and the carbon dioxide will be converted to a supercritical state. The supercritical carbon dioxide can be directly fed into the first storage device 10.

[0084] In some embodiments, the method of the embodiment of the present application further includes the following steps:

[0085] After the liquid carbon dioxide in the second storage device 22 is converted to a supercritical state, if the first pressure value is less than the second threshold pressure, the second valve 61 is controlled to open to spray the supercritical carbon dioxide in the second storage device 22 into the first storage device 10 .

[0086] When the first pressure value is equal to the first threshold pressure, the second valve 61 is closed.

[0087] Specifically, when the pressure in the first storage device 10 is low, the supercritical carbon dioxide in the second storage device 22 can be used to increase the pressure. After the high-pressure and room-temperature carbon dioxide is sprayed into the first storage device 10, it will be throttled and gasified, and the pressure in the first storage device 10 will continue to increase.

[0088] In some examples, when supercritical carbon dioxide is sprayed into the first storage device 10, controlling the second valve 61 to open can be achieved by the following steps:

[0089] The opening degree of the second valve 61 is set to an initial value.

[0090] The opening degree of the second valve 61 is reduced based on the increase in the first pressure value.

[0091] Exemplarily, the initial value may be set to 75%.

[0092] It is understandable that if the first pressure value in the first storage device 10 drops too much, resulting in the first pressure value being less than the second threshold pressure, the above method can also be referred to, the first valve 51 can be closed, the second valve 61 can be opened, and the residual liquid in the second storage device 22 can be used to fill the first pressure value in the first storage device 10. In this way, the abnormality caused by the excessively low pressure in the first storage device 10 can be effectively avoided.

[0093] It can be understood that the ship carbon dioxide recovery method of the embodiment of the present application can further spray and cool the gaseous carbon dioxide after liquefaction and supercooling to reduce the pressure and temperature in the storage tank, thereby achieving zero leakage storage, with significant effects. It can be applied to various types of ships, thereby greatly improving the transportation economy of carbon dioxide.

[0094] Accordingly, the embodiment of the present application also provides a ship, which includes the ship carbon dioxide recovery system of the embodiment of the present application. In this way, the ship of the embodiment of the present application can effectively avoid carbon dioxide leakage when transporting carbon dioxide, has excellent carbon dioxide transportation economy, and the ship type is not easily restricted.

[0095] The above is a detailed introduction to a ship carbon dioxide recovery system, method and ship provided in the embodiments of 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 technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A ship carbon dioxide recovery system, characterized in that: include: A first storage device (10), the first storage device (10) comprising a gas outlet port (101) and a liquid inlet port (102), the first storage device (10) being used to store carbon dioxide to be transported, the first storage device (10) comprising a first pressure sensor (11), the first pressure sensor (11) being used to monitor a first pressure value in the first storage device (10); A refrigeration device (20), the refrigeration device (20) comprising a first input port (201) and a first output port (202), the first input port (201) being in communication with the gas outlet port (101) via a first pipeline (50), the first pipeline (50) being provided with a first valve (51), the first output port (202) being in communication with the liquid inlet port (102) via a second pipeline (60), the second pipeline (60) being provided with a second valve (61), the refrigeration device (20) being used for liquefying gaseous carbon dioxide; a spraying device (30), the spraying device (30) being connected to the second pipeline (60) and being located at one end of the second valve (61) close to the liquid inlet port (102), the spraying device (30) being used to spray liquid carbon dioxide into the first storage device (10); A control device (40), wherein the control device (40) is connected to the refrigeration device (20), the first valve (51) and the second valve (61).

2. The ship carbon dioxide recovery system according to claim 1, characterized in that: The first pipeline (50) is also provided with a second pressure sensor (52), which is located between the first valve (51) and the first input port (201) and is used to monitor a second pressure value in the first pipeline (50).

3. The ship carbon dioxide recovery system according to claim 1, characterized in that: The refrigeration device (20) comprises a refrigeration unit (21), a second storage device (22) and a carbon dioxide pump (23); the refrigeration unit (21), the second storage device (22) and the carbon dioxide pump (23) are respectively connected to the control device (40); the refrigeration unit (21) comprises the first input port (201) and the second output port (203); the second storage device (22) comprises the second input port (204) and the third output port (205); the carbon dioxide pump (23) comprises the third input port (206) and the first output port (202); the second output port (203) is in communication with the second input port (204); and the third output port (205) is in communication with the third input port (206); The refrigeration unit (21) is used to liquefy gaseous carbon dioxide into supercooled carbon dioxide, the second storage device (22) is used to store the supercooled carbon dioxide, and the carbon dioxide pump (23) is used to pump the supercooled carbon dioxide.

4. The ship carbon dioxide recovery system according to claim 3, characterized in that: The first storage device (10) is a C-shaped tank, and the second storage device (22) is a container capable of accommodating cryogenic liquid.

5. The ship carbon dioxide recovery system according to claim 1, characterized in that: The storage device further comprises a temperature sensor (70), wherein the temperature sensor (70) is used to monitor the temperature inside the first storage device (10).

6. A method for recovering carbon dioxide from a ship, characterized in that: A control device (40) applied to a ship carbon dioxide recovery system according to any one of claims 1 to 5; the method comprising: Acquiring a first pressure value in a first storage device (10) monitored by a first pressure sensor (11); If the first pressure value is greater than a first threshold pressure, controlling the first valve (51) to open; Controlling the refrigeration device (20) to start working so as to liquefy the gaseous carbon dioxide in the first storage device (10); The refrigeration device (20) is controlled to start pumping liquid carbon dioxide, and the second valve (61) is controlled to open so as to spray the liquid carbon dioxide into the first storage device (10) through the spraying device (30).

7. The ship carbon dioxide recovery method according to claim 6, characterized in that: The controlling the refrigeration device (20) to start working comprises: Acquiring a second pressure value in the first pipeline (50) monitored by a second pressure sensor (52); If the second pressure value is greater than or equal to a second threshold pressure, the refrigeration device (20) is controlled to start working.

8. The ship carbon dioxide recovery method according to claim 6, characterized in that: Controlling the refrigeration device (20) to start pumping liquid carbon dioxide, and controlling the second valve (61) to open, comprises: If the liquid level in the second storage device (22) reaches a threshold liquid level, and the difference between the third pressure value in the second storage device (22) and the first pressure value is less than a third threshold pressure, the carbon dioxide pump (23) is controlled to start pumping liquid carbon dioxide, and the second valve (61) is controlled to open.

9. The ship carbon dioxide recovery method according to claim 8, characterized in that: The method further comprises: If the first pressure value is less than or equal to the first threshold pressure, the refrigeration unit (21) is controlled to stop working, and the first valve (51) and the second valve (61) are controlled to be closed.

10. The ship carbon dioxide recovery method according to claim 9, characterized in that: The method further comprises: After the liquid carbon dioxide in the second storage device (22) is converted to a supercritical state, if the first pressure value is less than the second threshold pressure, the second valve (61) is controlled to open so as to spray the supercritical carbon dioxide in the second storage device (22) into the first storage device (10); When the first pressure value is equal to the first threshold pressure, the second valve (61) is closed.

11. The ship carbon dioxide recovery method according to claim 10, characterized in that: Controlling the second valve (61) to open comprises: Setting the opening of the second valve (61) to an initial value; The opening degree of the second valve (61) is reduced based on the increase of the first pressure value.

12. A ship, characterized in that: The invention comprises a ship carbon dioxide recovery system as claimed in any one of claims 1 to 5.

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