Novel diamond-arranged filler for improving mass transfer of absorption tower

Abstract

The invention relates to the technical field of carbon dioxide absorption fillers, in particular to a diamond-arranged novel filler for improving mass transfer of an absorption tower, the diamond-arranged novel filler comprises a plurality of filler units, each filler unit is arranged to be a hollow prismatic dodecahedron, and each surface of each filler unit is provided with a hexagonal microgroove; the filler units are arranged side by side to form a filler layer, the filler layer is provided with a plurality of layers of diamond-arranged filler bodies, and the plurality of filler layers are arranged in a staggered and stacked manner. By changing the filler structure, a stable three-dimensional structure is formed, and the mass transfer efficiency is improved; when a gas phase and a liquid phase flow through the diamond arrangement filler body, local vortexes are generated at the corner angles of each filler unit, and interface updating can be enhanced.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide absorption packing technology, and in particular to a novel diamond-arranged packing for improving mass transfer in absorption towers. Background Technology

[0002] Existing absorber packings (such as Raschig rings, Pall rings, and structured corrugated packings) suffer from low mass transfer efficiency, high pressure drop, and uneven gas-liquid distribution, leading to low carbon capture efficiency and high energy consumption. Especially when treating high-concentration carbon dioxide gas, the specific surface area and fluid distribution of traditional packings are insufficient to meet the requirements for efficient mass transfer.

[0003] Therefore, developing a new type of absorber packing material is of great practical significance. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] To achieve the above objectives, this invention proposes a novel diamond-arranged packing material for improving mass transfer in absorption towers, comprising multiple packing units, wherein each packing unit is configured as a hollow dodecahedron, and each surface of the packing unit is provided with hexagonal microgrooves.

[0006] The packing units are arranged side by side to form a packing layer, and the packing layer is provided with multiple layers of packing bodies arranged in a diamond pattern, with the multiple packing layers being stacked alternately.

[0007] This invention improves mass transfer efficiency by changing the packing structure to form a stable three-dimensional structure; when the gas and liquid phases flow through the diamond-arranged packing body, local vortices are generated at the corners of each packing unit, which can enhance interface renewal.

[0008] Optionally, the length of each side of the packing unit is set to be in the range of 10 to 30 mm, and the wall thickness of each face is set to be in the range of 0.3 to 1.0 mm.

[0009] Furthermore, each of the packing units is provided with a hydrophilic coating.

[0010] Furthermore, the specific surface area of ​​the diamond-arranged filler body is 650. .

[0011] Furthermore, the pressure drop of the diamond-arranged packing body is 80–100 Pa / m.

[0012] Furthermore, the mass transfer coefficient of the diamond-arranged packing is 0.15 to 0.18. .

[0013] Furthermore, the spacing between adjacent filler layers is 50-80mm.

[0014] Furthermore, the porosity of the diamond-arranged filler body is 92%.

[0015] Furthermore, each of the packing units is made of stainless steel.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of a packing unit structure for a novel diamond-arranged packing material for improving mass transfer in an absorption tower according to the present invention. Figure 2 This is a top view schematic diagram of the arrangement structure of each packing layer of a novel diamond-arranged packing material for improving mass transfer in an absorption tower according to the present invention. Figure 3 This is a side view of a multilayer staggered stacked structure of a novel diamond-arranged packing material for improving mass transfer in an absorption tower according to the present invention. Figure 4 This is a schematic diagram of the stacked structure of a diamond-arranged packing body in an absorption tower, according to a novel diamond-arranged packing material for improving mass transfer in an absorption tower, based on the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Packing unit; 2. Packing layer; 3. Absorption tower; 4. Hexagonal microchannel. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] This invention proposes a novel diamond-arranged packing material for improving mass transfer in absorption towers, as described below. Figures 1 to 4 Please provide a detailed explanation.

[0021] A novel diamond-arranged packing for improving mass transfer in an absorption tower includes multiple packing units 1, each packing unit 1 being a hollow dodecahedron with hexagonal microgrooves 4 on each surface of the packing unit 1. Packing units 1 are arranged side by side to form a packing layer 2. Multiple packing units 1 are arranged side by side in the same plane to form a packing layer 2. The packing units 1 are arranged in a diamond shape in the top view, and a through gap channel is formed between adjacent packing units 1. The packing layer 2 is provided with multiple layers of diamond-shaped packing bodies, and the multiple packing layers 2 are stacked alternately. The upper packing layer 2 and the lower packing layer 2 are staggered in the horizontal direction, so that the upper packing unit 1 corresponds to the gap position between the lower packing units 1 in the top view direction.

[0022] Through the aforementioned staggered stacking structure, the gas phase can pass through the gaps between the lower packing units and scour the corners of the upper packing unit 1 during its ascent, while the liquid phase flows in the opposite direction, thereby creating local disturbances in the intersection area of ​​the packing units 1, enhancing the gas-liquid interface renewal, and improving mass transfer efficiency.

[0023] This invention improves mass transfer efficiency and CO2 capture rate by changing the packing structure to form a stable three-dimensional structure. The capture rate of a single tower can be increased from 80% to over 90% compared to traditional packing, thereby reducing carbon emissions. Furthermore, it can reduce pressure drop and solvent circulation volume. Reducing pressure drop can reduce fan energy consumption, and reducing solvent circulation volume can reduce regeneration consumption, thereby reducing the overall system energy consumption by 10%-15%. When the gas and liquid two-phase flow passes through the diamond-arranged packing body, local vortices are generated at the corners of each packing unit 1, which can enhance interface renewal and reduce channeling and wall flow.

[0024] Optionally, the length of each side of the packing unit 1 is set to be in the range of 10 to 30 mm, and the wall thickness of each face is set to be in the range of 0.3 to 1.0 mm. In one specific embodiment, the length of each side of the packing unit 1 is set to 20 mm, and the wall thickness of each face is set to 0.5 mm.

[0025] In some embodiments, each packing unit 1 is made of stainless steel, specifically 304 stainless steel, and each packing unit 1 is coated with a hydrophilic coating. This improves corrosion resistance while enhancing liquid film adhesion and mass transfer efficiency. Furthermore, the packing unit 1 is set independently and the structural strength of each packing unit 1 is enhanced, which extends the service life of the packing. When a single packing unit 1 needs to be replaced, only that packing unit 1 or the packing unit 1 in the same layer can be replaced, thereby reducing the cost of maintenance and replacement.

[0026] In one embodiment, the number of packing units 1 in adjacent packing layers 2 is set differently, and the packing units 1 of the upper packing layer 2 are directly opposite the gap position between adjacent packing units 1 of the lower packing layer 2, so as to realize the staggered arrangement between different packing layers 2.

[0027] In some embodiments, the specific surface area of ​​the diamond-arranged filler is 650. This increases the effective contact area per unit volume by 10% to 15%.

[0028] In some embodiments, the pressure drop of the diamond-arranged packing is 80–100 Pa / m.

[0029] In some embodiments, the mass transfer coefficient of the diamond-arranged packing is 0.15 to 0.18. .

[0030] In some embodiments, the porosity of the diamond-arranged packing is 92%.

[0031] In some embodiments, the spacing between adjacent filler layers 2 is 50-80 mm. The diamond-arranged filler body is configured to consist of multiple filler layers 2, forming a layered modular installation and disassembly structure, which facilitates later maintenance.

[0032] In some embodiments, a supporting system is provided for the diamond-arranged packing in the absorption tower 3, including a multi-stage spray system, baffles, demisters, and an interstage cooling system, wherein: A multi-stage spray system and baffles are used to ensure that the liquid phase uniformly covers the surface of the diamond-arranged packing body; The demister is located at the top of the tower to reduce droplet entrainment, and the demister is a corrugated plate demister to prevent mist entrainment. The interstage cooling system is an integrated cooling coil, located between adjacent packing layers 2, used to control the absorption temperature at 40-50℃ and improve the absorption efficiency of amine solution.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A novel diamond-arranged packing material for improving mass transfer in an absorption tower, characterized in that: It includes multiple packing units, each of which is configured as a hollow dodecahedron and has hexagonal microgrooves on each surface. The packing units are arranged side by side to form a packing layer, and the packing layer is provided with multiple layers of packing bodies arranged in a diamond pattern, with the multiple packing layers being stacked alternately.

2. The novel diamond-arranged packing material for improving mass transfer in an absorption tower as described in claim 1, characterized in that, The length of each side of the packing unit is set to be between 10 and 30 mm, and the wall thickness of each face is set to be between 0.3 and 1.0 mm.

3. A novel diamond-arranged packing material for improving mass transfer in an absorption tower as described in claim 1 or 2, characterized in that, Each of the packing units is provided with a hydrophilic coating.

4. The novel diamond-arranged packing material for improving mass transfer in an absorption tower as described in claim 1, characterized in that, The specific surface area of ​​the diamond-arranged filler is 650. .

5. The novel diamond-arranged packing material for improving mass transfer in an absorption tower as described in claim 1, characterized in that, The pressure drop of the diamond-arranged packing is 80–100 Pa / m.

6. The novel diamond-arranged packing material for improving mass transfer in an absorption tower as described in claim 1, characterized in that, The mass transfer coefficient of the diamond-arranged packing is 0.15 to 0.

18. .

7. The novel diamond-arranged packing material for improving mass transfer in an absorption tower as described in claim 1, characterized in that, The spacing between adjacent filler layers is 50-80mm.

8. The novel diamond-arranged packing material for improving mass transfer in an absorber tower as described in claim 1, characterized in that, The porosity of the diamond-arranged filler is 92%.

9. The novel diamond-arranged packing material for improving mass transfer in an absorption tower as described in claim 1, characterized in that, Each of the packing units is made of stainless steel.

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