Seawater type carbon capturing and sealing device

Abstract

The invention relates to the technical field of ocean carbon sequestration, and discloses a seawater type carbon trapping and sequestration device which comprises a trapping box arranged on an offshore platform, an upper funnel is arranged in the trapping box, and the trapping box is provided with a water collecting cavity and a water outlet hole; the washing area surrounds the periphery of the upper funnel and is provided with a filler layer; the bottom of the washing area is provided with an air inlet pipe, the top of the washing area is provided with an exhaust pipe, and the bottom of the washing area is provided with a drainage pipe; combustion flue gas enters the washing area through the gas inlet pipe and passes through the packing layer, and external seawater enters the water collecting cavity through the water inlet pipe and enters the washing area and the packing layer through the water outlet holes. External seawater and combustion flue gas are mixed in the washing area in an up-and-down hedging mode, the combustion flue gas is washed by the external seawater to form decarburized flue gas which is discharged outwards through the exhaust pipe, the external seawater absorbs carbon dioxide to form seawater in the box, and the seawater is discharged into the sea through the drainage pipe, so that the contact area and time of the seawater and the combustion flue gas are increased; therefore, the carbon capture efficiency is improved.

Description

Technical Field

[0001] This invention patent relates to the technical field of ocean carbon sequestration. Specifically, it relates to a seawater-based carbon capture and sequestration device. Background Art

[0002] The ocean is the largest carbon sink on Earth and has great potential for carbon sequestration. Since the ocean can naturally absorb carbon dioxide from the atmosphere, using the ocean for carbon sequestration is considered the most cost-effective method.

[0003] In recent years, seawater-based carbon capture and sequestration technology has gradually received attention. Since seawater itself contains a large amount of dissolved inorganic carbon and can naturally absorb carbon dioxide, devices related to carbon capture and sequestration technology have become key devices for reducing greenhouse gas emissions.

[0004] In the prior art, traditional carbon capture and sequestration devices are usually large in volume and complex in structure, making it difficult to arrange them in the limited space of offshore platforms. Moreover, they require a large amount of chemical reagents, resulting in high construction and operation costs. Since carbon capture relies on chemical absorbents or adsorbents, these materials have problems such as limited adsorption capacity and difficulty in regeneration in practical applications, making it difficult to further improve the carbon capture efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a seawater-based carbon capture and sequestration device, aiming to solve the problem of low carbon capture efficiency in the prior art.

[0006] The present invention is implemented as follows. The seawater-based carbon capture and sequestration device includes a capture tank arranged on an offshore platform. An upper funnel with a larger top and a smaller bottom is provided in the capture tank. A water collection cavity for injecting external seawater is provided in the upper funnel. The bottom of the water collection cavity is closed, and there are multiple water outlet holes on the outer periphery of the upper funnel. There is a washing area in the capture tank, which surrounds the outer periphery of the upper funnel. Multiple packing layers are provided in the washing area, and the multiple packing layers are arranged at intervals up and down along the washing area. There are packing voids in the packing layers.

[0007] A water inlet pipe for injecting external seawater into the water collection cavity is connected to the top of the water collection cavity. An air inlet pipe for injecting combustion flue gas into the washing area is connected to the bottom of the washing area. An exhaust pipe is connected to the top of the washing area, and a drain pipe is connected to the bottom of the washing area.

[0008] The combustion flue gas enters the washing area through the air inlet pipe and passes through the multiple packing layers from bottom to top. The external seawater enters the water collection cavity through the water inlet pipe and enters the washing area in a divergent manner through the multiple water outlet holes, and passes through the multiple packing layers from top to bottom.

[0009] The external seawater and the combustion flue gas are mixed in a vertical counterflow manner in the washing area. After being washed by the external seawater, the combustion flue gas forms decarbonized flue gas, which is discharged outward through the exhaust pipe. After absorbing carbon dioxide, the external seawater forms seawater inside the tank, and the seawater inside the tank is discharged into the sea through the drain pipe.

[0010] Furthermore, the drain pipe extends downward in a spiral shape into the seawater.

[0011] Furthermore, the drain pipe has a spiral drainage channel, and a plurality of flexible elastic sheets are provided in the drainage channel. During the flow of the seawater inside the tank in the drainage channel, the elastic sheets swing elastically under impact.

[0012] Furthermore, a water inlet head is connected to the water inlet pipe, and a filter layer is provided in the water inlet head. After being filtered by the filter layer, the external seawater enters the water collection cavity through the water inlet pipe.

[0013] Furthermore, the water inlet pipe has an internal section extending into the water collection cavity, and the internal section is arranged in a spiral shape along the circumferential direction of the water collection cavity; a plurality of internal holes are provided on the internal section, and the internal holes are arranged facing the inner side wall of the water collection cavity; the external seawater in the internal section is sprayed onto the inner side wall of the water collection cavity through the plurality of internal holes and enters the washing area through a plurality of water outlet holes.

[0014] Furthermore, a rotating plate is rotatably arranged at the lower part of the washing area. The rotating plate is located below the packing layer, and a plurality of rotating holes are provided in the rotating plate; the drain pipe is arranged below the rotating plate; the seawater inside the tank is driven to rotate by the rotating plate and flows downward through the rotating holes and is discharged into the sea through the drain pipe.

[0015] Furthermore, the rotating plate has an upper surface arranged upward, and a plurality of convex structures are provided on the upper surface.

[0016] Furthermore, the convex structure includes a flexible airbag arranged on the upper surface, and an elastic cavity is formed by enclosing between the flexible airbag and the upper surface; during the rotation of the rotating plate, the flexible airbag elastically deforms and drives the seawater inside the tank to fluctuate elastically upward.

[0017] Furthermore, the plurality of packing layers include a fixed layer and a floating layer that floats up and down relative to the fixed layer. The fixed layer is located below the floating layer, the outer periphery of the fixed layer is fixedly connected to the inner side wall of the washing area, and the outer periphery of the floating layer is movably abutted against the inner side wall of the washing area; during the mixing of the external seawater and the combustion flue gas in the washing area, the floating layer floats up and down relative to the fixed layer.

[0018] Furthermore, a plurality of elastically columns are connected between the floating layer and the fixed layer at intervals and surroundingly. The upper ends of the plurality of elastically columns converge and connect to the middle of the floating layer, and the lower ends of the plurality of elastically columns divergently connect to the fixed layer.

[0019] Compared with the prior art, the seawater-based carbon capture and storage device provided by the present invention has the following technical advantages:

[0020] Firstly, by arranging an upper funnel with a larger upper part and a smaller lower part in the capture tank and utilizing a plurality of water outlet holes on its outer periphery, external seawater enters the washing area in a divergent manner, forming an up-and-down counter-flow mixing with the combustion flue gas passing through the packing layer from bottom to top. This counter-flow mixing method greatly increases the contact area and contact time between seawater and combustion flue gas, enabling carbon dioxide to be efficiently absorbed by seawater, thereby improving the efficiency of carbon capture.

[0021] Secondly, the overall structure of the seawater-based carbon capture and storage device is compact, suitable for installation and operation on an offshore platform, with good flexibility and applicability. It fully considers the space limitations of the offshore platform and can meet the actual needs of ocean carbon storage.

[0022] Finally, by directly capturing and storing carbon dioxide on the offshore platform, the energy consumption and risks during carbon transportation are reduced, realizing on-site treatment of carbon storage, and improving the safety and economy of carbon storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the seawater-based carbon capture and storage device provided by the present invention;

[0024] Figure 2 is a sectional view of the drainage channel provided by the present invention;

[0025] Figure 3 is a schematic structural diagram of the rotating plate provided by the present invention;

[0026] In the figure: capture tank 100, upper funnel 101, washing area 102, rotating plate 103, rotating hole 104, upper surface 105, flexible airbag 106, elastic cavity 107;

[0027] water collection cavity 200, water inlet pipe 201, air inlet pipe 202, exhaust pipe 203, drain pipe 204, drainage channel 205, elastic sheet 206, filter layer 207, internal section 208;

[0028] packing layer 300, packing void 301, fixed layer 302, floating layer 303, elastic column 304. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The implementation of the present invention will be described in detail below in conjunction with specific embodiments.

[0031] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention 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. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] Referring to Figures 1-3 as shown, it is a preferred embodiment provided by the present invention.

[0033] A seawater-based carbon capture and storage device, including a capture box 100 arranged on an offshore platform. In the capture box 100, there is an upper funnel 101 with a larger upper part and a smaller lower part. In the upper funnel 101, there is a water collection cavity 200 for injecting external seawater. The bottom of the water collection cavity 200 is closed, and there are a plurality of water outlet holes on the outer periphery of the upper funnel 101; in the capture box 100, there is a washing area 102 surrounding the outer periphery of the upper funnel 101. In the washing area 102, there are a plurality of packing layers 300, and the plurality of packing layers 300 are arranged at intervals up and down along the washing area 102. In the packing layer 300, there are packing voids 301;

[0034] The top of the water collection cavity 200 is connected to a water inlet pipe 201 for injecting external seawater into the water collection cavity 200, and the bottom of the washing area 102 is connected to a gas inlet pipe 202 for injecting combustion flue gas into the washing area 102; the top of the washing area 102 is connected to an exhaust pipe 203, and the bottom of the washing area 102 is connected to a drain pipe 204;

[0035] The combustion flue gas enters the washing area 102 through the gas inlet pipe 202 and passes through the plurality of packing layers 300 from bottom to top. The external seawater enters the water collection cavity 200 through the water inlet pipe 201 and enters the washing area 102 in a divergent manner through the plurality of water outlet holes, and passes through the plurality of packing layers 300 from top to bottom;

[0036] External seawater and combustion flue gas are mixed in a vertical counterflow manner in the washing area 102. After being washed by the external seawater, the combustion flue gas forms decarbonized flue gas, which is discharged outward through the exhaust pipe 203. After absorbing carbon dioxide, the external seawater forms seawater inside the tank, and the seawater inside the tank is discharged into the sea through the drain pipe 204.

[0037] The seawater-based carbon capture and storage device provided above has the following technical advantages:

[0038] First, by setting the upper funnel 101 with a large upper part and a small lower part inside the capture tank 100 and using the multiple water outlet holes on its outer periphery, the external seawater enters the washing area 102 in a divergent shape, forming a vertical counterflow mixture with the combustion flue gas passing upward through the packing layer 300. This counterflow mixing method greatly increases the contact area and contact time between the seawater and the combustion flue gas, enabling carbon dioxide to be efficiently absorbed by the seawater, thereby improving the efficiency of carbon capture.

[0039] Second, the overall structure of the seawater-based carbon capture and storage device is compact, suitable for installation and operation on an offshore platform, with good flexibility and applicability, fully considering the space limitations of the offshore platform and being able to meet the actual needs of ocean carbon storage.

[0040] Finally, by directly capturing and storing carbon dioxide on the offshore platform, the energy consumption and risks during carbon transportation are reduced, realizing on-site treatment of carbon storage, and improving the safety and economy of carbon storage.

[0041] In this embodiment, the drain pipe 204 extends downward in a spiral shape into the seawater.

[0042] In this way, the seawater inside the tank can form a stable spiral flow during the discharge process, increasing the contact time between the seawater inside the tank and the combustion flue gas in the washing area 102 before discharge, improving the absorption efficiency of carbon dioxide. At the same time, the spiral drain pipe 204 can also reduce the turbulence and impact during the drainage process, avoid causing excessive disturbance to the surrounding seawater environment, and thus achieve a smoother drainage process, ensuring the stability and safety of carbon storage.

[0043] In this embodiment, the drain pipe 204 has a spiral drainage channel 205, and a plurality of flexible elastic sheets 206 are provided in the drainage channel 205. During the flow of the seawater inside the tank in the drainage channel 205, the elastic sheets 206 swing elastically under impact.

[0044] In this way, elastic swinging can be generated during the flow of the seawater inside the tank, increasing the degree of seawater turbulence, promoting the mixing of seawater and combustion flue gas, and improving the absorption efficiency of carbon dioxide. At the same time, the swinging of the elastic sheets 206 can also reduce the risk of blockage in the drainage channel 205, ensuring the smoothness of the drainage process, thereby improving the carbon capture efficiency while ensuring the stable operation of the device.

[0045] In this embodiment, a water inlet head is connected to the water inlet pipe 201. A filter layer 207 is provided in the water inlet head. After the external seawater is filtered by the filter layer 207, it enters the water collection cavity 200 through the water inlet pipe 201.

[0046] In this way, impurities and suspended matters in the external seawater can be effectively filtered, preventing these impurities from blocking the water outlet holes or the packing layer 300 after entering the water collection cavity 200, thereby ensuring the normal operation of the device. By providing clean seawater as the absorption medium, the contact effect between the seawater and the combustion flue gas can be improved, further enhancing the carbon capture efficiency, and at the same time reducing the equipment maintenance cost and operation risk caused by impurities.

[0047] In this embodiment, the water inlet pipe 201 has an inner section 208 extending into the water collection cavity 200. The inner section 208 is arranged spirally along the circumferential direction of the water collection cavity 200. A plurality of inner holes are provided on the inner section 208, and the inner holes are arranged towards the inner side wall of the water collection cavity 200. The external seawater in the inner section 208 is sprayed onto the inner side wall of the water collection cavity 200 through the plurality of inner holes, and enters the washing area 102 through the plurality of water outlet holes.

[0048] By setting the inner section 208, not only can the initial kinetic energy of the seawater be increased, making it form a more uniform divergent water flow when entering the washing area 102, but also the mixing effect between the seawater and the combustion flue gas can be improved, solving the problem of low carbon capture efficiency caused by uneven water flow distribution.

[0049] In this embodiment, a rotating plate 103 arranged to rotate is provided at the lower part of the washing area 102. The rotating plate 103 is located below the packing layer 300. A plurality of rotating holes 104 are provided in the rotating plate 103. The drain pipe 204 is arranged below the rotating plate 103. The seawater in the box is driven by the rotating plate 103 to rotate, and flows downward through the rotating holes 104 and is discharged into the sea through the drain pipe 204.

[0050] By setting the rotating plate 103, the seawater in the box can be driven by the rotating plate 103 to generate a rotating flow during the discharge process. This rotating flow can increase the contact time between the seawater and the combustion flue gas before discharge, further improving the carbon dioxide absorption efficiency. At the same time, it can also make the seawater uniformly discharged downward through the rotating holes 104, reducing the turbulence and impact during the drainage process.

[0051] In this embodiment, the rotating plate 103 has an upper surface 105 arranged upward, and a plurality of protruding structures are provided on the upper surface 105.

[0052] In this way, the contact area and frictional force between the rotating plate 103 and the seawater inside the tank are increased, which can not only improve the rotation speed and mixing effect of the seawater, but also generate local disturbance to the seawater through the convex structure, promoting the mixing of the seawater and the combustion flue gas. In addition, the convex structure can also reduce the wear on the surface of the rotating plate 103, extend the service life of the rotating plate 103, and reduce the maintenance cost of the device.

[0053] In this embodiment, the convex structure includes a flexible airbag 106 disposed on the upper surface 105, and an elastic cavity 107 is formed by enclosing between the flexible airbag 106 and the upper surface 105; during the rotation of the rotating plate 103, the flexible airbag 106 elastically deforms to drive the seawater inside the tank to elastically fluctuate upward.

[0054] Through the flexible airbag 106, elastic deformation can be generated during the rotation of the rotating plate 103, thereby driving the seawater inside the tank to elastically fluctuate upward, increasing the degree of seawater turbulence and mixing effect, and enabling the seawater to be in full contact with the combustion flue gas. At the same time, the flexible airbag 106 can also reduce the direct impact of the rotating plate 103 on the seawater during rotation, avoiding seawater splashing or equipment damage caused by excessive turbulence.

[0055] In this embodiment, the plurality of packing layers 300 include a fixed layer 302 and a floating layer 303 that floats up and down relative to the fixed layer 302. The fixed layer 302 is located below the floating layer 303, the outer periphery of the fixed layer 302 is fixedly connected to the inner side wall of the washing area 102, and the outer periphery of the floating layer 303 is movably abutted against the inner side wall of the washing area 102; during the mixing of the external seawater and the combustion flue gas in the washing area 102, the floating layer 303 floats up and down relative to the fixed layer 302.

[0056] By setting the packing layer 300 as a combined structure of the fixed layer 302 and the floating layer 303, during the mixing of the external seawater and the combustion flue gas, the floating layer 303 can float up and down relative to the fixed layer 302, increasing the gap change between the packing layers 300, further promoting the mixing and mass transfer effect of the seawater and the combustion flue gas, thereby improving the carbon capture efficiency. At the same time, the floating layer 303 can also reduce the performance degradation problem of the packing layer 300 caused by blockage during long-term operation.

[0057] In this embodiment, a plurality of spaced-apart and circumferentially arranged elastic columns 304 are connected between the floating layer 303 and the fixed layer 302. The upper ends of the plurality of elastic columns 304 converge and are connected to the middle of the floating layer 303, and the lower ends of the plurality of elastic columns 304 are divergently connected to the fixed layer 302.

[0058] By arranging a plurality of elastic columns 304 between the floating layer 303 and the fixed layer 302, stable support and elastic buffering can be provided for the floating layer 303. This can not only ensure good motion stability of the floating layer 303 during the up-and-down floating process, but also further increase the gap change between the packing layers 300 through the elastic deformation of the elastic columns 304, thereby promoting the mixing and mass transfer effect of seawater and combustion flue gas and improving the carbon capture efficiency. At the same time, the elastic columns 304 can also reduce the risk of damage to the packing layer 300 caused by mechanical vibration or impact during operation, ensuring the long-term stable operation of the device.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A seawater carbon capture and storage device, characterized in that: The invention comprises a capture box arranged on an offshore platform, wherein an upper funnel with a larger upper part and a smaller lower part is provided in the capture box, wherein a water collecting cavity for injecting external seawater is provided in the upper funnel, wherein the bottom of the water collecting cavity is closed, and wherein the outer periphery of the upper funnel is provided with a plurality of water outlet holes; wherein a washing area is provided in the capture box, wherein the washing area surrounds the outer periphery of the upper funnel, wherein a plurality of packing layers are provided in the washing area, wherein the plurality of packing layers are arranged at intervals up and down along the washing area, and wherein the packing layers have packing gaps; The top of the water collecting chamber is connected to a water inlet pipe for injecting external seawater into the water collecting chamber, and the bottom of the washing area is connected to an air inlet pipe for injecting combustion flue gas into the washing area; the top of the washing area is connected to an exhaust pipe, and the bottom of the washing area is connected to a drain pipe; The combustion flue gas enters the washing area through the air inlet pipe and passes through the multiple packing layers from bottom to top. The external seawater enters the water collecting cavity through the water inlet pipe and enters the washing area in a divergent manner through the multiple water outlet holes and passes through the multiple packing layers from top to bottom. The external seawater and the combustion flue gas are mixed in the washing area. The combustion flue gas is washed by the external seawater to form decarbonized flue gas, which is discharged to the outside through the exhaust pipe. The external seawater absorbs carbon dioxide to form seawater in the box, which is discharged to the sea through the drain pipe.

2. The seawater carbon capture and storage device according to claim 1, characterized in that: The drain pipe extends spirally downward into the sea water.

3. The seawater carbon capture and storage device according to claim 1, characterized in that: The drain pipe has a spiral drain channel, and a plurality of flexible elastic sheets are arranged in the drain channel. When the seawater in the box flows in the drain channel, the elastic sheets are impacted and elastically swing.

4. The seawater carbon capture and storage device according to claim 1, characterized in that: The water inlet pipe is connected to a water inlet head, in which a filter layer is arranged. After the external seawater is filtered by the filter layer, it enters the water collecting chamber through the water inlet pipe.

5. The seawater carbon capture and storage device according to claim 1, characterized in that: The water inlet pipe has an inner section extending into the water collecting chamber, and the inner section is arranged in a spiral manner along the circumference of the water collecting chamber; a plurality of inner holes are provided on the inner section, and the inner holes are arranged toward the inner wall of the water collecting chamber; the external seawater in the inner section is sprayed onto the inner wall of the water collecting chamber through the plurality of inner holes, and enters the washing area through the plurality of water outlet holes.

6. The seawater carbon capture and storage device according to any one of claims 1 to 5, characterized in that: A rotatable rotating plate is provided at the lower part of the washing area, the rotating plate is located below the packing layer, a plurality of rotating holes are provided in the rotating plate, and the drain pipe is arranged below the rotating plate; the seawater in the box is driven to rotate by the rotating plate, flows downward through the rotating holes, and is discharged into the sea through the drain pipe.

7. The seawater carbon capture and storage device according to claim 6, characterized in that: The rotating plate has an upper surface arranged upward, and the upper surface is provided with a plurality of protrusion structures.

8. The seawater carbon capture and storage device according to claim 7, characterized in that: The protruding structure includes a flexible airbag arranged on the upper surface, and an elastic cavity is formed between the flexible airbag and the upper surface; during the rotation of the rotating plate, the flexible airbag is elastically deformed to drive the seawater in the box to elastically fluctuate upward.

9. The seawater carbon capture and storage device according to any one of claims 1 to 5, characterized in that: The multiple packing layers include a fixed layer and a floating layer that floats up and down relative to the fixed layer. The fixed layer is located below the floating layer. The outer periphery of the fixed layer is fixedly connected to the inner wall of the washing area, and the outer periphery of the floating layer is movably abutted against the inner wall of the washing area. During the mixing of the external seawater and the combustion flue gas in the washing area, the floating layer floats up and down relative to the fixed layer.

10. The seawater carbon capture and storage device according to claim 9, characterized in that: A plurality of elastic columns are connected between the floating layer and the fixed layer. The upper ends of the elastic columns are connected to the middle of the floating layer, and the lower ends of the elastic columns are connected to the fixed layer in a divergent manner.

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