Shipborne greenhouse gas emission reduction equipment

Abstract

The invention provides shipborne greenhouse gas emission reduction equipment, which is used for absorbing greenhouse gas in tail gas on a ship body, and comprises a reaction tank which is an absorption tower or a desorption tower, the absorption tower is used for capturing the greenhouse gas, and the desorption tower is used for releasing the greenhouse gas; the first end of the connecting piece is connected to the top of the reaction tank, the second end of the connecting piece is connected to the ship body so that the reaction tank can rotate relative to the ship body, and the connecting piece comprises a first state and a second state; when the connecting piece is in the first state, the bottom of the reaction tank is propped against the ship body; and when the connecting piece is in the second state, the bottom of the reaction tank is suspended, so that the reaction tank is kept vertical. The shipborne greenhouse gas emission reduction equipment disclosed by the invention can effectively solve the problem that the reaction tower is influenced by ship body inclination and swinging caused by stormy waves in a navigation environment.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment, and in particular to a shipborne greenhouse gas emission reduction device. Background Art

[0002] The continued greenhouse gas emissions caused by global human activities will lead to further warming and long-term climate change, which will increase the possibility of serious and irreversible damage to humans and ecosystems. Addressing climate change requires a significant and sustained reduction in greenhouse gas emissions. The global shipping industry's carbon dioxide emissions exceed 1 billion tons, accounting for about 2% to 3% of the world's total emissions, forcing the shipping industry to join the ranks of decarbonization.

[0003] Shipboard carbon capture equipment has become a decarbonization technology that the shipping industry is paying close attention to. Using a carbon capture plant similar to land to absorb and capture carbon dioxide on board using solvents requires an absorption tower to absorb the carbon dioxide in the exhaust gas, and then a desorption tower is used to regenerate the solvent rich liquid to separate the carbon dioxide to achieve solvent circulation. The separated carbon dioxide needs to be compressed and cooled into liquid carbon dioxide and stored in special tanks on board. The advantage of ship carbon capture is that it does not require engine modification, is not restricted by fuel type, and does not require changes in the way ship fuel is burned. It can be flexibly used as a terminal decarbonization technology on various ship types and routes.

[0004] From the current technology, the shipboard carbon dioxide capture technology has been widely recognized, but it is extremely challenging to build chemical equipment in the limited space of ships. Since the capture of carbon dioxide requires solvents to absorb and desorb carbon dioxide in the exhaust gas, and the solvents are volatile and corrosive, unlike onshore carbon capture equipment, the offshore environment must also be considered during installation and construction to ensure that the equipment has the ability to prevent tilting and swaying under wind and wave conditions. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a shipborne greenhouse gas emission reduction device, which can effectively solve the problem of the influence of the tilting and swaying of the hull caused by wind and waves on the reaction tower in the sailing environment.

[0006] According to the first aspect of the present invention, a shipborne greenhouse gas emission reduction device is used to absorb greenhouse gases in exhaust gas on a hull, comprising: a reaction tank, which is an absorption tower or a desorption tower, the absorption tower is used to capture greenhouse gases in exhaust gas through a solvent, and the desorption tower is used to release greenhouse gases in the solvent; a connecting piece, a first end of the connecting piece is connected to the top of the reaction tank, and a second end of the connecting piece is connected to the hull so that the reaction tank swings relative to the hull, and the connecting piece includes a first state and a second state; when the connecting piece is in the first state, the bottom of the reaction tank abuts against the hull; when the connecting piece is in the second state, the bottom of the reaction tank is suspended in the air so that the reaction tank remains vertical.

[0007] The shipborne greenhouse gas emission reduction device according to the first embodiment of the present invention has at least the following beneficial effects: the reaction tank is connected to the hull through the connecting piece. In the first state, the hull is in a relatively stable state, the bottom of the reaction tank abuts against the hull, the reaction tank can sway slightly, and the swing range of the top of the reaction tank is limited by the connecting piece, so that the reaction tank is in a relatively stable state. In the second state, the hull is in a relatively bumpy state. At this time, the connecting piece is tightened so that the top of the reaction tank is hung on the hull and the bottom of the reaction tank is suspended, so that the reaction tank will not sway with the hull under the action of gravity, but remain vertical.

[0008] According to some embodiments of the present invention, it further includes a tower side rod body, which is fixedly arranged on the hull, the second end of the connecting member is connected to the tower side rod body, and the first end of the connecting member is hung on the top of the reaction tank.

[0009] According to some embodiments of the present invention, a protective ring is further included. The protective ring is fixedly disposed on the tower side rod body, and the protective ring is sleeved on the reaction tank. There is a gap between the protective ring and the reaction tank to limit the swing amplitude of the reaction tank.

[0010] According to some embodiments of the present invention, a plurality of protection rings are included. When the reaction tank is kept vertical, the plurality of protection rings are arranged at intervals along the reaction tank.

[0011] According to some embodiments of the present invention, a base is further included, and a groove is arranged on the base. When the connecting member is in the first state, the bottom of the reaction tank is arranged in the groove.

[0012] According to some embodiments of the present invention, the groove is a hemispherical groove, and the bottom of the reaction tank has a curved surface, and the curved surface is rotationally matched with the groove to make the reaction tank swing.

[0013] According to some embodiments of the present invention, the connecting member is a non-elastic chain.

[0014] According to some embodiments of the present invention, a retractable device is further included, the connecting member is a flexible chain, the second end of the chain is arranged on the retractable device, and the retractable device is used to control the length of the chain so that the connecting member switches between the first state and the second state.

[0015] According to some embodiments of the present invention, a plurality of lifting ears are further included, and the plurality of lifting ears are evenly arranged around the top of the reaction tank. The first end of the connecting piece is provided with a plurality of fixing parts, and the fixing parts correspond to the lifting ears one by one and are connected to the lifting ears.

[0016] According to some embodiments of the present invention, the number of the lifting ears is an even number.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a schematic structural diagram of a connecting piece of a shipborne greenhouse gas emission reduction device in some embodiments of the present invention in a first state; Figure 2 It is a structural schematic diagram of the reaction tank swinging when the connecting piece of the shipborne greenhouse gas emission reduction device in some embodiments of the present invention is in the first state; Figure 3 It is a structural schematic diagram of a connecting piece of a shipborne greenhouse gas emission reduction device in some embodiments of the present invention in a second state; Figure 4 It is a structural schematic diagram of the swinging of the reaction tank when the connecting piece of the shipborne greenhouse gas emission reduction device in some embodiments of the present invention is in the second state.

[0019] Reference numerals: 1. Reaction tank; 11. Top; 12. Bottom; 2. Connector; 21. First end; 22. Second end; 23. Fixing part; 3. Hull; 4. Tower side rod; 5. Protective ring; 6. Base; 7. Lifting ear; 8. Retracting and releasing device. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0024] Ship exhaust decarbonization is to collect and centrally store greenhouse gases such as carbon dioxide in ship exhaust. The specific implementation process is: seawater passes through the seawater feed pipeline, and after being pressurized by the seawater feed pump, a part of it enters the water washing tower through the seawater inlet washing tower pipeline to cool the ship exhaust fed by the ship exhaust to about 40°C, and remove the particulate matter therein. After washing, the exhaust gas goes to the booster pipeline to enter the compressor, and enters the absorber through the exhaust gas feed pipe port through the exhaust gas inlet absorption tower pipeline after washing to treat the exhaust gas. The washed seawater is discharged into the sea through the carbon dioxide-containing seawater pipeline after washing. The other part enters the absorber through the seawater inlet absorption tower pipeline and the seawater feed pipe port. After washing, the ship's exhaust gas is subjected to the carbon capture chemical absorption method. The carbon dioxide in the exhaust gas and the solvent form a carbamate solvent-rich liquid. The exhaust gas passes through the bottom discharge pipe of the absorber tower, and enters the absorber tower bottom pump through the solvent-rich liquid to bottom pump pipeline for pressurization. After that, it passes through the solvent-rich liquid to the heating pipeline, enters the solvent-lean-rich liquid heat exchanger for preheating, and then passes through the solvent-rich liquid to the desorber pipeline, and enters the desorber through the solvent-rich liquid feed pipe for solvent regeneration and carbon dioxide desorption. The carbon dioxide product is further compressed, liquefied and stored through the carbon dioxide discharge port at the top of the desorber tower. The regenerated solvent-lean liquid will pass through the solvent-lean liquid discharge pipe at the bottom of the desorber tower, through the solvent-lean liquid to the cooling pipeline, enter the solvent-lean-rich liquid heat exchanger for cooling, and then enter the absorber tower pipeline through the solvent circulation, and enter the absorber tower through the solvent feed pipe for carbon dioxide absorption. The most core process is to absorb the carbon dioxide in the exhaust gas in the absorber tower by the solvent. After the solvent absorbs carbon dioxide, it is discharged into the desorption tower, where the carbon dioxide in the solvent is released, so that the gas in the desorption tower is carbon dioxide with higher purity. Then the carbon dioxide in the desorption tower is compressed and liquefied for collection. Liquefying and compressing carbon dioxide for storage is an effective way to store carbon dioxide, and its process mainly involves two key steps: compression and cooling. The carbon dioxide gas released in the desorption tower has a high purity. First, the carbon dioxide gas is compressed in multiple stages by a compressor to increase its pressure. Generally speaking, compressing carbon dioxide gas to at least atmospheric pressure is a prerequisite for liquefaction. During the compression process, the temperature and pressure of the gas will increase, so a cooling system is needed to reduce the temperature to prevent overheating and damage to the equipment. At the same time or after compression, the carbon dioxide gas is further cooled by a cooler. Common cooling methods include using coolants and cooling media (such as water or liquid ammonia) to reduce the temperature of the gas. When the temperature of carbon dioxide gas drops below its saturation temperature, the gas begins to condense into a liquid. This saturation temperature depends on the pressure. Generally speaking, the higher the pressure, the higher the saturation temperature. The liquefied carbon dioxide is stored in high-pressure cylinders or cryogenic tanks. For high-pressure liquefied liquid carbon dioxide, medium- and high-pressure storage containers should be used; while for low-temperature liquefied liquid carbon dioxide, medium- and low-pressure storage containers can be used, but their corresponding design temperatures are lower, and low-temperature plates should also be used for the containers.The storage container needs to have good sealing and pressure resistance to ensure that carbon dioxide will not leak or have accidents during storage, so that more carbon dioxide in the exhaust gas can be captured.

[0025] There are many kinds of solvents for capturing carbon dioxide, and these solvents play a key role in carbon dioxide capture technology. Propylene carbonate: It is a commonly used solvent for absorbing carbon dioxide gas. The physical absorption method is less corrosive to the equipment and requires less heat consumption, but the amount of carbon dioxide absorbed at normal pressure is low, and the solvent is easily affected by impurities such as sulfides in flue gas and degraded, so its regeneration and recycling performance is poor. Polyethylene glycol, N-methylpyrrolidone, polyethanol dimethyl ether, etc.: These solvents also have a certain ability to absorb carbon dioxide, but in practical applications, they may need to be selected and optimized according to specific conditions. Amine solution: Amine solution chemical absorption method is one of the most advanced carbon dioxide separation technologies and is widely used in power generation, fuel modification and industrial production. Amine solution (such as ethanolamine MEA) reacts chemically with carbon dioxide in the absorption tower to form a rich liquid, which is then heated and decomposed in the desorption tower to separate and recover carbon dioxide. This method has high requirements for temperature and pressure control, and the mass fraction of the amine solution is generally controlled at 25-30% to avoid serious corrosion to the equipment. Polyethylene glycol dimethyl ether: This solvent has been used in the production of supporting solvents for CO2 capture. By using abundant propylene resources to produce propylene oxide, and then further producing solvents such as polyethylene glycol dimethyl ether, the demand for carbon dioxide capture can be met. In addition, organic solvents such as methanol are also one of the commonly used solvents for carbon dioxide capture.

[0026] The shipborne greenhouse gas emission reduction device of the first aspect of the present invention is used to absorb greenhouse gases in exhaust gas on the hull 3, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 . It includes: a reaction tank 1 and a connector 2, the reaction tank 1 is an absorption tower or a desorption tower, the absorption tower is used to capture greenhouse gases in the exhaust gas through a solvent, and the desorption tower is used to release greenhouse gases in the solvent. The solvent for capturing carbon dioxide circulates between the absorption tower and the desorption tower. The exhaust gas of the ship is discharged into the absorption tower, and the carbon dioxide in the exhaust gas will dissolve into the solvent in the absorption tower. After absorbing carbon dioxide, the solvent will be discharged into the desorption tower, and the carbon dioxide will be released in the desorption tower. After releasing carbon dioxide, the solvent enters the absorption tower again to absorb carbon dioxide in the exhaust gas, and circulates back and forth. In the absorption tower, the solvent absorbs the carbon dioxide in the exhaust gas of the ship into the solvent, and in the desorption tower, the solvent releases the carbon dioxide in the exhaust gas into the desorption tower. When the greenhouse gas capture equipment is operated in a sailing environment, the continuous swaying and tilting of the hull will cause the mass transfer capacity of the reaction equipment to decrease, and it cannot operate stably, so shaking needs to be avoided.

[0027] There are many components in the exhaust gas of ships. Sulfur oxides (SOx): The sulfur oxides in ship exhaust mainly come from the combustion of sulfur in fuel oil. Sulfur oxides are one of the main components of air pollution and have serious impacts on human health and the environment, including the formation of acid rain. Nitrogen oxides (NOx): Nitrogen oxides are one of the main pollutants produced during the combustion of ship diesel engines. It is mainly formed by the reaction of nitrogen in the fuel with oxygen at high temperatures, and it may also be produced by the oxidation of nitrogen in the air during the combustion process. Nitrogen oxides are not only harmful to human health, but also an important precursor of photochemical smog and ozone layer depletion. Particulate matter (PM): Particulate matter in ship exhaust includes black carbon, organic particulate matter, etc. These particulate matter have serious effects on human health, can penetrate deep into the lungs and cause various respiratory diseases. In addition, particulate matter will also affect atmospheric visibility and climate. Carbon monoxide (CO): Although its toxicity is lower than other pollutants, large-scale emissions will still have adverse effects on human health and the environment. Carbon dioxide (CO2): As one of the greenhouse gases, the emission of carbon dioxide has an important impact on global climate change. Volatile organic compounds (VOCs): include a variety of organic compounds that are potentially harmful to human health and the environment. Carbon dioxide is the main component of greenhouse gases and needs to be effectively collected. When the exhaust gas is flushed with seawater, various substances such as particulate matter in the exhaust gas can be removed.

[0028] The first end 21 of the connector 2 is connected to the top 11 of the reaction tank 1, and the second end 22 of the connector 2 is connected to the hull 3, so that the reaction tank 1 can swing relative to the hull 3. Specifically, the first end 21 of the connector 2 is hung on the top 11 of the reaction tank 1, and\or, the second end 22 of the connector 2 is hung on the hull 3. At the same time, the first end 21 of the connector 2 itself can swing relative to the second end 22, so that the reaction tank 1 can swing relative to the hull 3. It should be noted that the swing of the reaction tank 1 is caused by the action of gravity, that is, when the hull 3 shakes, the gravity makes the reaction tank 1 swing relative to the hull 3 in order to keep the reaction tank 1 in a vertical state, so as to avoid the solvent in the reaction tank 1 from shaking violently and leaking. Keeping the reaction tank 1 in a vertical state means that the central axis of the reaction tank 1 points to the center of the earth.

[0029] The connector 2 includes a first state and a second state; when the connector 2 is in the first state, the bottom 12 of the reaction tank 1 abuts against the hull 3; when the connector 2 is in the second state, the bottom 12 of the reaction tank 1 is suspended in the air to keep the reaction tank 1 vertical. There are two types of states during the travel of the ship. One is a stable state. In the stable state, the hull swings less. At this time, it corresponds to the first state of the connector 2. The connector 2 is extended so that the bottom 12 of the reaction tank 1 can abut against the hull 3. At this time, most of the weight of the reaction tank 1 is borne by the hull, and when the reaction tank 1 shakes in the hull, the shaking amplitude of the reaction tank 1 relative to the hull is smaller, so that the reaction tank 1 is more stable. The other is a bumpy state. The hull 3 swings more in the bumpy state, which corresponds to the second state of the connector 2. The length of the connector 2 is shortened, and the reaction tank 1 is hung, so that the bottom 12 of the reaction tank 1 is suspended in the air, so that the reaction tank 1 can swing more conveniently relative to the hull 3, that is, it remains vertical under the action of gravity.

[0030] According to some embodiments of the present invention, a tower side rod body 4 is further included, the tower side rod body 4 is fixedly arranged on the hull 3, the second end 22 of the connector 2 is connected to the tower side rod body 4, and the first end 21 of the connector 2 is hung on the top 11 of the reaction tank 1. In the process of setting the connector 2 and the reaction tank 1, in order to avoid setting the reaction tank 1 too high or setting the connector 2 too long, the connection position of the connector 2 and the hull 3 needs to be adjusted. Usually, the reaction tank 1 is set in the cabin, and the height of the top 11 of the cabin cannot be adjusted, so the tower side rod body 4 is set so that the connector 2 can be set at a suitable height to avoid the connector 2 being too long.

[0031] According to some embodiments of the present invention, a protective ring 5 is further included, the protective ring 5 is fixedly arranged on the tower side rod body 4, the protective ring 5 is sleeved on the reaction tank 1, and there is a gap between the protective ring 5 and the reaction tank 1 to limit the swing amplitude of the reaction tank 1. In order to prevent the reaction tank 1 from swinging too much, the protective ring 5 is set to limit the swing range of the reaction tank 1. When the connecting member 2 is in the first state, the top 11 of the reaction tank 1 swings, and the bottom 12 of the reaction tank 1 abuts on the hull 3 without changing its position. The connecting member 2 can limit the swing range of the top 11 of the reaction tank 1, and the protective ring 5 can protect the reaction tank 1 when the reaction tank 1 breaks free from the connecting member 2, so as to prevent the reaction tank 1 from tipping over, and at the same time, it can also prevent the swing angle of the reaction tank 1 from being too large due to the excessive length of the connecting member 2. When the connector 2 is in the second state, the top 11 of the reaction tank 1 is hung on the hull 3 and the bottom 12 of the reaction tank 1 is suspended. When the hull 3 shakes, the bottom 12 of the reaction tank 1 swings more, and the shaking amplitude of the hull 3 is greater at this time, which will cause the bottom 12 of the reaction tank 1 to swing more. In order to avoid the bottom 12 of the reaction tank 1 from swinging more and to prevent the reaction tank 1 from colliding with the hull 3, etc., a protective ring 5 is provided to prevent the reaction tank 1 from swinging more. Further, an elastic gasket, such as a rubber pad, is provided on the inner side of the protective ring 5, so that when the protective ring 5 collides with the reaction tank 1, the rubber pad elastically protects the reaction tank 1 to avoid damage to the reaction tank 1. When the protective ring 5 is provided, the size of the protective ring 5 is set according to the size of the reaction amplitude allowed for the reaction tank 1. When the protective ring 5 is sleeved on the outer side of the reaction tank 1, there is a gap between the protective ring 5 and the reaction tank 1, and the reaction tank 1 can swing in the protective ring 5.

[0032] According to some embodiments of the present invention, a plurality of protective rings 5 ​​are included. When the reaction tank 1 is kept vertical, the plurality of protective rings 5 ​​are arranged at intervals along the reaction tank 1. The plurality of protective rings 5 ​​can limit the swing of the reaction tank 1 more safely and reliably, and prevent the reaction tank 1 from departing from the swing range defined by the protective rings 5.

[0033] According to some embodiments of the present invention, a base 6 is further included, and a groove is arranged on the base 6. When the connecting member 2 is in the first state, the bottom 12 of the reaction tank 1 is arranged in the groove. By arranging the groove, when the hull 3 is in a relatively stable state, that is, in the first state, the reaction tank 1 is placed on the base 6, and the bottom 12 of the reaction tank 1 is matched with the groove on the base 6, so that the reaction tank 1 can be fixed relative to the hull 3, and the shaking of the reaction tank 1 can be better avoided.

[0034] According to some embodiments of the present invention, the groove is a hemispherical groove, and the bottom 12 of the reaction tank 1 has a curved surface, and the curved surface rotates with the groove to make the reaction tank 1 swing. Through the cooperation between the groove and the bottom 12 of the reaction tank 1, when the connecting member 2 is in the first state, the bottom 12 of the reaction tank 1 rotates in the groove relative to the groove, so that the reaction tank 1 swings, making the reaction tank 1 more stable. Further, a counterweight block is set at the bottom 12 of the reaction tank 1, and under the action of gravity, the reaction tank 1 is kept in a vertical state according to the principle of a tumbler.

[0035] According to some embodiments of the present invention, the connecting member 2 is a non-elastic chain, so that the swing of the reaction tank 1 is more stable. Specifically, the connecting member 2 is set as a metal chain.

[0036] According to some embodiments of the present invention, a retractable device 8 is also included, the connecting member 2 is a flexible chain, and the second end 22 of the chain is arranged on the retractable device 8, and the retractable device 8 is used to control the length of the chain so that the connecting member 2 switches between the first state and the second state. The flexible chain can be wound and the chain can be retracted more conveniently. Specifically, the retractable device 8 is set to a winding motor, and the winding motor shortens the length of the connecting member 2 by winding the chain on the motor, thereby hanging the reaction tank 1, so that the connecting member 2 is in the second state, and the bottom 12 of the reaction tank 1 is suspended. The winding motor releases the length of the chain, thereby lengthening the length of the connecting member 2, so that the connecting member 2 is in the first state.

[0037] According to some embodiments of the present invention, a plurality of lifting ears 7 are further included, and the plurality of lifting ears 7 are evenly arranged around the top 11 of the reaction tank 1. The first end 21 of the connector 2 is provided with a plurality of fixing portions 23, and the fixing portions 23 correspond to the lifting ears 7 one by one and are connected to the lifting ears 7. By providing a plurality of lifting ears 7, the connection between the connector 2 and the reaction tank 1 is more stable, and the lifting ears 7 are evenly arranged around the top 11 of the reaction tank 1, so that the reaction tank 1 is easier to maintain a vertical state when it is lifted by the connector 2.

[0038] According to some embodiments of the present invention, the number of the lifting lugs 7 is an even number. The number of the lifting lugs 7 is set to an even number so that the force applied to the reaction tank 1 during the swinging process is more reasonable.

[0039] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. Shipborne greenhouse gas emission reduction equipment, used to absorb greenhouse gases in exhaust gas on the hull, characterized in that: include: A reaction tank, wherein the reaction tank is an absorption tower or a desorption tower, wherein the absorption tower is used to capture greenhouse gases in tail gas through a solvent, and the desorption tower is used to release greenhouse gases in the solvent; A connecting member, wherein a first end of the connecting member is connected to the top of the reaction tank, and a second end of the connecting member is connected to the hull, so that the reaction tank can swing relative to the hull, and the connecting member includes a first state and a second state; When the connecting member is in the first state, the bottom of the reaction tank abuts against the hull; When the connecting member is in the second state, the bottom of the reaction tank is suspended in the air, so that the reaction tank remains vertical.

2. The shipborne greenhouse gas emission reduction device according to claim 1, characterized in that: It also includes a tower side rod body, which is fixedly arranged on the hull, the second end of the connecting member is connected to the tower side rod body, and the first end of the connecting member is hung on the top of the reaction tank.

3. The shipborne greenhouse gas emission reduction device according to claim 2, characterized in that: It also includes a protection ring, which is fixedly arranged on the tower side rod body, and the protection ring is sleeved on the reaction tank. There is a gap between the protection ring and the reaction tank to limit the swing amplitude of the reaction tank.

4. The shipborne greenhouse gas emission reduction device according to claim 3, characterized in that: The invention comprises a plurality of protection rings, which are arranged at intervals along the reaction tank when the reaction tank is kept vertical.

5. The shipborne greenhouse gas emission reduction device according to claim 1, characterized in that: It also includes a base, which is provided with a groove. When the connecting piece is in the first state, the bottom of the reaction tank is arranged in the groove.

6. The shipborne greenhouse gas emission reduction device according to claim 5, characterized in that: The groove is a hemispherical groove, and the bottom of the reaction tank has a curved surface, and the curved surface is rotationally matched with the groove to make the reaction tank swing.

7. The shipborne greenhouse gas emission reduction device according to claim 1, characterized in that: The connecting piece is a non-elastic chain.

8. The shipborne greenhouse gas emission reduction device according to claim 7, characterized in that: It also includes a retractable device, the connecting member is a flexible chain, the second end of the chain is arranged on the retractable device, and the retractable device is used to control the length of the chain so that the connecting member switches between the first state and the second state.

9. The shipborne greenhouse gas emission reduction device according to claim 8, characterized in that: It also includes a plurality of lifting ears, which are evenly arranged around the top of the reaction tank. The first end of the connecting piece is provided with a plurality of fixing parts, which correspond to the lifting ears one by one and are connected to the lifting ears.

10. The shipborne greenhouse gas emission reduction device according to claim 9, characterized in that: The number of the lifting ears is an even number.

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