A seawater desulfurization device based on an imitated door curtain type chain filler structure

Abstract

The utility model belongs to seawater flue gas desulfurization technical field, especially relates to a seawater desulfurization device based on imitative door curtain type chain filler structure. Its technical scheme is: a seawater desulfurization device based on imitative door curtain type chain filler structure, including the absorption tower, the lower part of absorption tower is provided with the flue gas entrance, the top of absorption tower is provided with the flue gas exit, the inside of absorption tower is arranged in proper order from top to bottom and has demister, spray layer, filler hanging grid, a plurality of imitative door curtain type chain filler structure, filler block grid, the flue gas entrance is located filler block grid downside, and imitative door curtain type chain filler structure includes a plurality of flexible connecting pieces and a plurality of link units connected at intervals, and the uppermost flexible connecting piece is connected below filler hanging grid. The utility model provides a seawater desulfurization device based on imitative door curtain type chain filler structure, and the filler swing is driven through the flue gas disturbance, realizes efficient mass transfer and automatic descaling, realizes the multiple optimization of long-term stable operation of system, reduction of maintenance frequency, reduction of system pressure drop and desulfurization efficiency improvement.

Description

Technical Field

[0001] This utility model belongs to the field of seawater flue gas desulfurization technology, and specifically relates to a seawater desulfurization device based on a curtain-like chain packing structure. Background Technology

[0002] In the industrial process of seawater flue gas desulfurization, packed towers are widely used as key equipment, and their performance has a significant impact on the mass transfer efficiency, pressure drop, and energy consumption of the overall system. Currently, most packing materials used are structured packings or random packings. Random packings, such as Pall rings and stepped rings, offer flexible arrangement, strong adaptability, and high mass transfer efficiency, but they also suffer from drawbacks such as uneven packing, gas flow deviation, packing loosening or leakage, and are difficult to maintain. Structured packings, such as corrugated plate packings, have a uniform structure, good pressure resistance, and high mechanical strength, but they are costly to manufacture, complex to produce and install, and prone to problems such as scaling or impurity accumulation leading to blockage.

[0003] To improve the desulfurization efficiency and reduce system energy consumption in seawater desulfurization technology, numerous patented technologies have optimized the structure and arrangement of packing materials. Patent CN215389326U discloses a polytetrafluoroethylene (PTFE) Pall ring, with mesh grooves on the outer surface of the ring wall and raised mesh patterns on the inner surface. Windows are located on the Pall ring wall, but this design suffers from problems such as packing deformation, clumping, and severe wear. Patent CN222352987U discloses a structured packing material that is easy to install. Through a limiting component, the structured packing material can be quickly and easily installed to the required position and angle, and disassembly is simple and convenient. However, the resistance in the absorption zone of the absorption tower is relatively high. Utility Model Content

[0004] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a seawater desulfurization device based on a curtain-like chain packing structure. By driving the packing to swing through flue gas disturbance, it achieves efficient mass transfer and automatic descaling, and realizes multiple optimizations such as long-term stable operation of the system, reduced maintenance frequency, reduced system pressure drop and improved desulfurization efficiency.

[0005] The technical solution adopted in this utility model is as follows: A seawater desulfurization device based on a curtain-like chain packing structure includes an absorption tower. The lower part of the absorption tower has a flue gas inlet, and the top of the absorption tower has a flue gas outlet. Inside the absorption tower, from top to bottom, there are a demister, a spray layer, a packing mounting grid, several curtain-like chain packing structures, and a packing blocking grid. The flue gas inlet is located below the packing blocking grid. The curtain-like chain packing structure includes several flexible connectors and several chain link units connected at intervals. The uppermost flexible connector is connected to the bottom of the packing mounting grid.

[0006] This invention employs a vertically suspended, curtain-like chain packing structure to form a highly permeable gas-liquid channel. The chain links feature a flexible connection design (swing angle 0°–30°), which adapts to flue gas turbulence, significantly reducing the risk of structural stress fatigue and enhancing anti-scaling capabilities. The radial micropores / textures on the surface of the hollow chain links and the internal turbulence channels synergistically enhance the gas-liquid-solid three-phase contact efficiency, allowing the desulfurization slurry to form a dynamically renewing liquid film on the packing surface, significantly improving SO2 absorption and sulfite oxidation. Simultaneously, the natural hanging characteristics of the chain units avoid the complex support framework required by traditional packing layers, simplifying installation and maintenance. Their tightly arranged structure effectively intercepts droplets and creates a uniform flow field, reducing the load on the spray layer and the risk of demister clogging. Overall, this results in a desulfurization efficiency increase of over 15% and a system pressure drop reduction of 20%–30%.

[0007] As a preferred embodiment of this utility model, the link unit is a hollow structure, and the shape of the link unit is a cylinder, a hexahedral cylinder, or an ellipsoid.

[0008] As a preferred embodiment of this utility model, the surface of the link unit is uniformly arranged with radial micropores or fine textures.

[0009] As a preferred embodiment of this utility model, the material of the chain link unit is polypropylene, polyethylene, polytetrafluoroethylene or stainless steel.

[0010] As a preferred embodiment of this utility model, the surface of the link unit is provided with a hydrophilic region structure and / or a hydrophobic region structure, and the interior of the link unit is provided with a turbulence hole or channel structure.

[0011] As a preferred embodiment of this utility model, the flexible connector is made of elastic nylon rope or corrosion-resistant aluminum chain.

[0012] As a preferred embodiment of this utility model, the packing mounting grid has several openings evenly distributed on it, and the flexible connector at the uppermost end of the curtain-like chain packing structure is connected to the openings of the packing mounting grid.

[0013] As a preferred embodiment of this utility model, a counterweight is connected to the bottom of the curtain-like chain packing structure.

[0014] As a preferred embodiment of this utility model, the packing barrier grid is provided with through holes.

[0015] As a preferred embodiment of this utility model, the included angle between adjacent link units is 0° to 30°.

[0016] The beneficial effects of this utility model are as follows: This invention employs a vertically suspended, curtain-like chain packing structure to form a highly permeable gas-liquid channel. The chain links feature a flexible connection design (swing angle 0°–30°), which adapts to flue gas turbulence, significantly reducing the risk of structural stress fatigue and enhancing anti-scaling capabilities. The radial micropores / textures on the surface of the hollow chain links and the internal turbulence channels synergistically enhance the gas-liquid-solid three-phase contact efficiency, allowing the desulfurization slurry to form a dynamically renewing liquid film on the packing surface, significantly improving SO2 absorption and sulfite oxidation. Simultaneously, the natural hanging characteristics of the chain units avoid the complex support framework required by traditional packing layers, simplifying installation and maintenance. Their tightly arranged structure effectively intercepts droplets and creates a uniform flow field, reducing the load on the spray layer and the risk of demister clogging. Overall, this results in a desulfurization efficiency increase of over 15% and a system pressure drop reduction of 20%–30%. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of a link unit.

[0018] In the diagram: 1-Flue gas inlet; 2-Packing baffle; 3-Imitation curtain-type chain packing structure; 4-Packing hanging grid; 5-Spray layer; 6-Demister; 7-Flue gas outlet; 8-Liquid inlet; 9-Counterweight; 10-Liquid outlet. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.

[0021] like Figure 1 and Figure 2As shown, the seawater desulfurization device based on a curtain-like chain packing structure of this utility model includes an absorption tower. A flue gas inlet 1 is located at the bottom of the absorption tower, and a flue gas outlet 7 is located at the top. Inside the absorption tower, from top to bottom, are arranged a demister 6, a spray layer 5, a packing support grid 4, several curtain-like chain packing structures 3, and a packing blocking grid 2. The flue gas inlet 1 is located below the packing blocking grid 2. The curtain-like chain packing structure 3 includes several flexible connectors and several chain link units connected at intervals. The uppermost flexible connector is connected below the packing support grid 4, and the chain link unit can be filled with packing material. A liquid inlet 8 is located on the absorption tower corresponding to the spray layer 5, and a liquid outlet 10 is located at the bottom of the absorption tower.

[0022] The length of the curtain-like chain packing structure 3 is 2000–6000 mm. The upper end of each curtain-like chain packing structure 3 passes through evenly distributed openings (opening diameter 50–80 mm, opening spacing 15–25 mm) on the packing mounting grid 4, and they are connected and fixed to each other at the upper end of the openings (using hooks or slots, etc.) to the packing mounting grid 4. The curtain-like chain packing structures 3 are naturally suspended vertically side-by-side on the packing mounting grid 4, arranged in a curtain-like uniform distribution, forming a dense and permeable chain packing layer. A counterweight 9 (including but not limited to a conical metal weight) is provided at the bottom of the curtain-like chain packing structure 3 to ensure the overall chain structure is suspended vertically and has stable sag.

[0023] The curtain-like chain packing structure 3 consists of several hollow cylindrical chain links with circular cross-sections (50-100mm in diameter) connected in series. Adjacent chain links are linked together by flexible connectors (including but not limited to elastic nylon ropes, corrosion-resistant aluminum chains, etc.) to form a chain structure, allowing free three-dimensional swing at the joints. The surface of each chain link has uniformly distributed radial micropores (2-10mm in diameter) or fine textures, and adjacent chain links are interconnected. The chain links are hollow cylindrical structures (made of polypropylene, polyethylene, polytetrafluoroethylene, stainless steel, or other corrosion-resistant materials), including but not limited to cylinders, hexahedral cylinders, ellipsoids, etc. The surface of each chain link is designed with hydrophilic or hydrophobic zones, and the interior contains turbulence-inducing holes or channels.

[0024] The flue gas inlet 1 of the absorption tower is provided with a packing barrier grid 2 between it and the curtain-like chain packing structure 3; the diameter of the through holes on the packing barrier grid 2 is 30-70mm and the opening rate is 40%-70%.

[0025] The hinge angle between adjacent link units ranges from 0° to 30°.

[0026] The distance between the packing grid 4 and the spray layer 5 is 500-2500mm.

[0027] The packing barrier 2 is 0-1500mm away from the upper edge of the flue gas inlet 1.

[0028] This invention employs a vertically suspended, curtain-like chain packing structure 3 to form a highly permeable gas-liquid channel. The chain link units utilize a flexible connection design (swing angle 0°~30°), which adapts to flue gas turbulence, significantly reducing the risk of structural stress fatigue and substantially improving anti-scaling capabilities. The radial micropores / textures on the surface of the hollow chain link units and the internal turbulence channels synergistically enhance the gas-liquid-solid three-phase contact efficiency, enabling the desulfurization slurry to form a dynamically renewed liquid film on the packing surface, significantly improving SO2 absorption rate and sulfite oxidation effect. Simultaneously, the natural hanging characteristics of the chain units avoid the complex support framework required by traditional packing layers, simplifying installation and maintenance; their tightly arranged structure effectively intercepts droplets and creates a uniform flow field, reducing the load on the spray layer 5 and the risk of demister clogging 6, comprehensively achieving an operational benefit of over 15% improvement in desulfurization efficiency and a 20%~30% reduction in system pressure drop.

[0029] Example: like Figure 1 As shown, the seawater desulfurization device based on a curtain-like chain packing structure in this embodiment includes a flue gas inlet 1, an absorption tower shell, and a flue gas outlet 7. Inside the absorption tower, from bottom to top, are arranged a packing baffle grid 2, a counterweight 9, a curtain-like chain packing structure 3, a packing mounting grid 4, a spray layer 5, and a demister 6. Holes with a diameter of 50mm and an opening rate of 52% are evenly distributed on the packing baffle grid 2 and the packing mounting grid 4 to ensure smooth gas-liquid passage. Approximately 1000 curtain-like chain packing structures 3 (each 4000mm high) pass through evenly distributed small holes on the packing mounting grid 4 and are connected and fixed to each other (swing angle 0°~30°). Each structure consists of approximately 50 flexibly hinged chain link units made of PP material with a circular cross-section (60mm diameter). Adjacent chain link units are connected by corrosion-resistant aluminum chains. The chain link units have evenly distributed radial micropores (5mm in diameter, e.g., ... Figure 2 As shown in the diagram, adjacent chain link units are interconnected. The curtain-like chain packing structure 3 occupies 60% of the total volume of the corresponding packing layer. The packing baffle grid 2 is arranged 500mm away from the upper edge of the flue gas inlet 1, and the packing mounting grid 4 is 51000mm away from the spray layer. The flue gas passes through the packing layer from bottom to top. The curtain-like chain packing structure 3 randomly moves left and right, disturbing the gas-liquid flow field, ensuring that the SO2 contained in the flue gas can fully react with the seawater. Actual measurements show that when the desulfurization tower is at 90% load, the SO2 outlet concentration is controlled at 30mg / Nm³. 3 Within this range, the pressure drop inside the tower is less than 450 Pa, the operation is stable for 2000 hours, and the thickness of the scale layer on the packing surface does not exceed 2 mm.

[0030] Comparative Example 1: Conventional polypropylene structured packing material was used, with a packing height of 4000 mm. Other conditions were the same as in Example 1. The desulfurization efficiency of the absorption tower was 97.2%, and the SO2 concentration at the outlet was 50 mg / Nm³. 3 The tower internal resistance is 1200Pa, and the scale layer thickness on the packing surface is greater than 4mm after 1500h of operation test.

[0031] Comparative Example 2: Using conventional polypropylene random packing material, and with other conditions the same as Comparative Example 1, the desulfurization efficiency of the absorption tower was 96%, and the SO2 outlet concentration was 72 mg / Nm³. 3 The resistance of the packed tower is 1800Pa, and the scale layer thickness on the packing surface is greater than 4mm after 1500h of operation.

[0032] Comparative analysis shows that this invention develops a seawater desulfurization device based on a curtain-like chain packing structure. The vertically suspended curtain-like chain packing structure, with a bottom counterweight 9 ensuring uniform vertical distribution of the packing layer, forms a highly permeable gas-liquid channel, thus enhancing gas-liquid mass transfer. Results indicate that, with the same seawater usage, this invention's technology more easily achieves SO2 emissions at or below the ultra-low emission limit (35 mg / Nm³). 3 The absorption zone has lower resistance.

[0033] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.

Claims

1. A seawater desulfurization device based on a curtain-like chain packing structure, characterized in that: The absorption tower includes a flue gas inlet (1) at the bottom and a flue gas outlet (7) at the top. Inside the absorption tower, from top to bottom, there are a demister (6), a spray layer (5), a packing mounting grid (4), several imitation curtain-type chain packing structures (3), and a packing blocking grid (2). The flue gas inlet (1) is located below the packing blocking grid (2). The imitation curtain-type chain packing structure (3) includes several flexible connectors and several chain link units connected at intervals. The uppermost flexible connector is connected to the bottom of the packing mounting grid (4).

2. The seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The link unit is a hollow structure, and the shape of the link unit is a cylinder, a hexahedral cylinder, or an ellipsoid.

3. The seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The surface of the link unit is uniformly distributed with radial micropores or fine textures.

4. A seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The material of the link unit is polypropylene, polyethylene, polytetrafluoroethylene or stainless steel.

5. A seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The surface of the link unit is provided with a hydrophilic region structure and / or a hydrophobic region structure, and the interior of the link unit is provided with a turbulence hole or channel structure.

6. A seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The flexible connector is made of elastic nylon rope or corrosion-resistant aluminum chain.

7. A seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The packing grid (4) has several openings evenly distributed on it, and the flexible connector at the top of the curtain-like chain packing structure (3) is connected to the openings of the packing grid (4).

8. A seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The bottom of the curtain-like chain packing structure (3) is connected to a counterweight (9).

9. A seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The filler bar grid (2) is provided with through holes.

10. A seawater desulfurization device based on a curtain-like chain packing structure according to claim 1, characterized in that: The included angle between adjacent link units is 0° to 30°.

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