Marine carbon capture desorption tower and ship

Abstract

The utility model discloses a marine carbon capture desorption tower and a ship, and the desorption tower comprises a tower body which is internally provided with a filler. The rich liquid inlet is formed in the upper part of the tower body and is communicated with the interior of the tower body and the rich liquid pipeline. The desorbed gas outlet is formed in the top of the tower body. The barren liquor outlet is formed in the left end of the bottom of the tower body. The rich liquid outlet is formed in the bottom of the tower body. The rich solution reboiling inlet is formed in the right end of the bottom of the tower body. And the rich liquor reboiler is communicated with the bottom of the tower body through a rich liquor reboiling inlet. The baffle is vertically arranged below the filler in the tower body and divides an internal area below the filler in the tower body into a left part and a right part, and the baffle is not in contact with the bottom of the filler. According to the carbon capture system, the reboiler is arranged at the bottom of the desorption tower, rich liquor in the desorption tower is heated, high-temperature gas heated by the reboiler flows through the desorption tower to continuously heat the filler section, so that part of rich liquor is decomposed before entering the reboiler, the heating power of the reboiler is reduced, and the power required by the whole carbon capture system is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ships, in particular to a ship-based carbon capture and desorption tower and a ship. Background Art

[0002] Marine carbon capture systems use an organic amine solution to absorb CO2 from engine exhaust, then decompose it into pure CO2 for storage and utilization. After absorbing the CO2, the organic amine solution transforms into a rich liquid, which then needs to be decomposed and stored. This decomposition reaction takes place in a desorption tower. The desorption reaction is the most energy-intensive part of the carbon capture system, especially for low-powered ships. Therefore, reducing this energy consumption is a key issue in current carbon capture system research.

[0003] Compared to absorption towers, desorption towers operate on a completely different principle. They spray a rich liquid onto a special packing, where a high-temperature reaction decomposes it into a mixture of water vapor and CO₂, known as desorbed gas, which is collected from the top of the tower. The organic amine solution after the decomposition reaction, known as the lean liquid, is discharged from the bottom of the tower for recycling. Desorption towers require a specific structural design for CO₂ decomposition. The packing height, which directly influences the decomposition rate, and the tower diameter, which determines the desorbed gas flow rate, are both critical design parameters. Existing marine carbon capture systems, to meet sufficient carbon capture efficiency and meet the exhaust emissions requirements of high-powered vessels, employ a tall tower design. The internal structure is typically a double-layer packing design, with each layer consisting of a packing support, packing, a packing compression grid, and a liquid distributor. Utility model patent application number "CN201822101983.4" discloses a carbon dioxide desorption device for cement kilns that utilizes pre-exhaust heat from the reaction to reduce desorption power consumption and lower costs. However, this utility model is only applicable to land-based systems and cannot be used on ships.

[0004] Current marine carbon capture systems typically utilize technology derived from land-based thermal power plant exhaust emissions. However, these desorption towers suffer from high power consumption, difficulty attaching to ships, and low desorption efficiency. Some towers can reach 20 to 30 meters in height, resulting in a high center of gravity and difficulty securing them, making it difficult for ships to pass under bridges. These existing solutions are suitable for vessels with large displacement and high engine power, but lack the flexibility to accommodate smaller displacement vessels with low engine power for inland waterways. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes a marine carbon capture and desorption tower and a ship. The desorption tower is suitable for small-power ships, is easy to install, and has low power consumption, solving the problem of lack of small-power carbon capture system desorption towers in the current shipping industry.

[0006] The utility model discloses a kind of marine carbon capture desorption towers, including:

[0007] Tower body, internally provided with packing.

[0008] Rich liquid inlet is arranged on the upper portion of tower body, and is connected with the inside of tower body and rich liquid pipeline.

[0009] Desorption gas outlet is arranged on the top of tower body.

[0010] Lean liquid outlet is arranged on the left end of bottom of tower body.

[0011] Rich liquid outlet is arranged on the bottom of tower body.

[0012] Rich liquid reboiling inlet is arranged on the right end of bottom of tower body.

[0013] Rich liquid reboiler is communicated with the bottom of tower body through rich liquid reboiling inlet.

[0014] Baffle is vertically arranged below packing in the inside of tower body, and the inside area below packing in tower body is divided into left and right two parts, wherein, left half part is rich liquid area, right half part is lean liquid area, and baffle does not contact with the bottom of packing.

[0015] Preferably, rich liquid inlet is arranged in part of tower body, and spray head is arranged.

[0016] Preferably, pressure gauge, flow valve and liquid level switch are arranged on one side of spray head.

[0017] Preferably, safety valve is arranged on desorption gas outlet.

[0018] Preferably, wire mesh demister is arranged between rich liquid inlet and desorption gas outlet.

[0019] Preferably, liquid level meter is arranged on the bottom of rich liquid area and lean liquid area respectively.

[0020] Preferably, temperature monitoring device is arranged on the bottom of tower body.

[0021] The utility model discloses a kind of marine carbon capture desorption towers, including:

[0022] Compared with prior art, the utility model has the following advantages:

[0023] The utility model provides a marine carbon capture and desorption tower and a ship. A reboiler is arranged at the bottom of the desorption tower to heat, decompose and evaporate the rich liquid in the desorption tower to convert it into a lean liquid and gaseous CO2. The lean liquid flows downward into the lean liquid zone and then flows out from the lean liquid outlet for recycling. At the same time, the high-temperature gas heated, decomposed and evaporated by the reboiler flows through the desorption tower and can continue to heat the entire desorption tower packing section, so that part of the rich liquid is decomposed before entering the reboiler, reducing the heating power of the reboiler, thereby reducing the power required for the overall carbon capture system.

[0024] The desorption tower provided by the utility model has a simple internal structure, which greatly reduces the difficulty of production. The desorption tower provided by the utility model has a lower system height and lower desorption power consumption, and is more suitable for small ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a marine carbon capture and desorption tower in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the external structure of a marine carbon capture and desorption tower in an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of a marine carbon capture and desorption tower in an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the arrangement of a marine carbon capture and desorption tower in a carbon capture system in an embodiment of the present utility model.

[0029] In the figure, 1 is the tower body; 2 is the filler; 3 is the rich liquid inlet; 4 is the desorption gas outlet; 5 is the lean liquid outlet; 6 is the rich liquid outlet; 7 is the rich liquid reboiler inlet; 8 is the rich liquid reboiler; 9 is the baffle; 10 is the spray head; 11 is the pressure gauge; 12 is the liquid level switch; 13 is the safety valve; 14 is the wire mesh demister; 15 is the liquid level meter; and 16 is the temperature monitoring device. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0031] like Figures 1 to 3 As shown, the technical solution of the present invention provides a marine carbon capture and desorption tower, comprising:

[0032] The tower body 1 has a filler 2 arranged inside.

[0033] Rich liquid inlet 3 is arranged on the upper part of tower body 1, and is connected with the inside of tower body 1 and a rich liquid pipeline.

[0034] Desorbed gas outlet 4 is arranged on the top of tower body 1.

[0035] Lean liquid outlet 5 is arranged on the left end of the bottom of tower body 1.

[0036] Rich liquid outlet 6 is arranged on the bottom of tower body 1.

[0037] Rich liquid reboiling inlet 7 is arranged on the right end of the bottom of tower body 1.

[0038] Rich liquid reboiler 8 is connected with the bottom of tower body 1 through rich liquid reboiling inlet 7.

[0039] Baffle 9 is vertically arranged below the filler 2 in the inside of tower body 1, and divides the inside area below the filler 2 in tower body 1 into left and right two parts, wherein the left half part is a rich liquid area, the right half part is a lean liquid area, and baffle 9 is not in contact with the bottom of filler 2.

[0040] As shown in Figure 3 one of the embodiments of the present application, the rich liquid inlet 3 is arranged with a spray head 10.

[0041] As shown in Figure 3 one of the embodiments of the present application, the spray head 10 is arranged with a pressure gauge 11, a flow valve and a liquid level switch 12 on one side.

[0042] As shown in Figure 3 one of the embodiments of the present application, the desorbed gas outlet 4 is arranged with a safety valve 13.

[0043] As shown in Figure 3 one of the embodiments of the present application, a wire mesh demister 14 is arranged between the rich liquid inlet 3 and the desorbed gas outlet 4.

[0044] As shown in Figure 3 one of the embodiments of the present application, liquid level meters 15 are arranged at the bottoms of the lean liquid area and the rich liquid area respectively.

[0045] As shown in Figure 3 one of the embodiments of the present application, a temperature monitoring device 16 is arranged at the bottom of the tower.

[0046] The marine carbon capture desorption tower provided by the present application is further described in detail through a specific example as follows, in the embodiment, the structure of the marine carbon capture desorption tower is shown in Figures 1 to 3 .

[0047] The desorption tower is suitable for small power ships, and the land area of the desorption tower can be designed to be very small, and the packing height does not have to be very high, because the amount of rich liquid to be decomposed is small, and the generated CO2 is also small. Therefore, the desorption tower is designed with single-layer packing 2, and does not need a liquid distributor. Figure 2 As shown in the figure, the tower height 4m greatly reduces the height and space occupied by the tower. As shown in the figure, Figure 3 After the absorbent absorbs CO2, it is converted into rich liquid, which is sprayed into the desorption tower from the rich liquid inlet 3, fully contacts the packing 2 in the desorption tower, and falls to the bottom end of the packing 2 under the influence of gravity. Due to the existence of the baffle 9, the rich liquid will only flow into the left rich liquid area, and then be heated, decomposed and evaporated into liquid lean liquid and gas CO2 by the reboiler 8. The lean liquid flows downward into the right lean liquid area, and then flows out from the lean liquid outlet for recycling. The gas CO2 flows upward from the gap above the middle baffle 9, and flows out from the desorption gas outlet 4 at the top of the desorption tower. At the same time, the high-temperature gas generated by heating, decomposing and evaporating in the reboiler flows through the packing section of the desorption tower, continues to heat the entire packing section of the desorption tower, decomposes part of the rich liquid before it enters the reboiler 8, reduces the heating power of the reboiler 8, and thus reduces the power required by the overall carbon capture system. As shown in the figure, Figure 3 Because the desorption tower is a high-temperature and high-pressure container, a safety valve 13 is arranged at the upper part of the desorption tower to ensure the safety of the desorption tower. At the same time, a pressure gauge 11 and a flow valve are arranged to complete the pressure maintaining of the desorption tower, and to ensure the optimal reaction pressure in the desorption tower. The liquid level switch 12 is used to prevent the phenomenon of “liquid flooding” of the desorption tower. The flip plate type liquid level meter 15 is arranged at the bottom of the desorption tower, and the lean liquid area and the rich liquid area are monitored in real time. At the same time, the temperature monitoring device 16 monitors the temperature, and adjusts the power of the reboiler 8 in real time, so as to ensure the optimal reaction temperature in the desorption tower.

[0048] As shown in the figure, Figure 4 In addition to providing a carbon capture desorption tower for ships in the technical scheme of the utility model, a ship provided with the above-mentioned carbon capture desorption tower for ships is further provided in the utility model, Figure 4 In the utility model, the frame line part is the setting part of the carbon capture desorption tower.

[0049] The above is the preferred embodiment of the utility model, and it should be pointed out that for ordinary technical personnel in the technical field, some improvements and decorations can be made without departing from the principle of the utility model, and these improvements and decorations should also be regarded as the protection range of the utility model.

Claims

1. A marine carbon capture desorption column characterized by: The desorption tower comprises: a tower body (1) internally provided with a filler (2); a rich liquid inlet (3) arranged on the upper part of the tower body (1) and communicating the interior of the tower body (1) with a rich liquid pipeline; a desorption gas outlet (4) arranged on the top of the tower body (1); a lean liquid outlet (5) arranged on the left end of the bottom of the tower body (1); a rich liquid outlet (6) arranged on the bottom of the tower body (1); a rich liquid reboil inlet (7) arranged on the right end of the bottom of the tower body (1); a rich liquid reboiler (8) communicating with the bottom of the tower body (1) through the rich liquid reboil inlet (7); a baffle (9) vertically arranged below the filler (2) in the interior of the tower body (1), dividing the interior area below the filler (2) in the tower body (1) into left and right two parts, wherein the left half part is a rich liquid zone and the right half part is a lean liquid zone, and the baffle (9) is not in contact with the bottom of the filler (2).

2. A marine carbon capture desorption tower as claimed in claim 1 characterised in that: The rich liquid inlet (3) is arranged with a spray head (10) into the tower body (1).

3. A marine carbon capture desorption tower as claimed in claim 2 characterised in that: One side of the spray head (10) is arranged with a pressure gauge (11), a flow valve and a liquid level switch (12).

4. A marine carbon capture desorption tower as claimed in claim 3 characterised in that: The desorption gas outlet (4) is arranged with a safety valve (13).

5. A marine carbon capture desorption tower as claimed in claim 4 characterised in that: Between the rich liquid inlet (3) and the desorption gas outlet (4), a wire mesh demister (14) is arranged.

6. A marine carbon capture desorption tower as claimed in claim 5 characterised in that: The bottom of the rich liquid zone and the lean liquid zone is respectively arranged with a liquid level meter (15).

7. A marine carbon capture desorption tower as claimed in claim 6 characterised in that: The bottom of the tower body is arranged with a temperature monitoring device (16).

8. A marine vessel provided with a carbon capture system, characterized in that: The carbon capture system is arranged with the marine carbon capture desorption tower according to any one of claims 1-7.

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