Layered dynamic enhanced seawater desulfurization device

Abstract

The utility model relates to seawater method flue gas desulfurization technical field, aims at solving the problem of high operating cost, liquid flooding risk leads to low safe operation coefficient, flue gas desulfurization efficiency and energy consumption balance difficulty in prior art, provides a kind of layered dynamic reinforcement's seawater desulfurization device, including absorption tower;The bottom end of absorption tower, outer bottom wall, outer top wall and top end are respectively equipped with liquid outlet, gas inlet, liquid inlet and gas outlet;Absorption tower is sequentially provided with gas distributor from bottom to top, packing layer support device, dynamic packing layer, packing layer zoning device, static packing layer, packing layer fixing device, spray layer and demister;Packing layer support device, packing layer zoning device and packing layer fixing device all have several through grid or through-hole, and spray layer is connected with liquid inlet.The utility model has the beneficial effect of improving desulfurization efficiency, completely eliminating liquid flooding hazard, system resistance is greatly reduced, operating energy consumption is low, safe operation stability is strong, and it is convenient to realize flue gas desulfurization efficiency and energy consumption balance.

Description

Technical Field

[0001] This utility model relates to the field of seawater flue gas desulfurization technology, and more specifically, to a layered dynamic enhanced seawater desulfurization device. Background Technology

[0002] Seawater flue gas desulfurization technology occupies a core position in the field of flue gas desulfurization in coastal power plants due to the unique advantage of natural alkaline seawater as a desulfurizing agent. It does not require the preparation of additional desulfurizing agents and has significant advantages such as short process flow, simple operation, high desulfurization efficiency, and low investment and operating costs. As the core equipment of the seawater desulfurization system, the structural design of the packed tower directly affects the desulfurization efficiency. Traditional packed towers, through the design of large tower diameter, low flue gas velocity, and long residence time, provide the basic conditions for full contact between flue gas and seawater, thereby achieving high desulfurization and dust removal efficiency. At present, seawater desulfurization packings are mainly divided into two categories: random packings and structured packings, each with its own advantages and disadvantages.

[0003] Random packing is widely used in small and medium-scale desulfurization systems due to its high degree of disorder, excellent gas-liquid mass transfer effect, large operational flexibility, strong adaptability, and convenient maintenance and replacement. However, under conditions such as high liquid-to-gas ratio and complex flue gas composition, it is prone to blockage due to impurity deposition, which can lead to flooding and a sharp drop in desulfurization efficiency, seriously threatening the safe and stable operation of the system. Structured packing, on the other hand, is known for its uniform and regular structure, excellent fluid distribution performance, stable mass transfer efficiency, and high mechanical strength, making it suitable for large-scale desulfurization scenarios. However, its manufacturing cost is usually high, and its fixed structure makes operation and maintenance more difficult. It is also less adaptable to fluctuations in operating conditions, thus limiting its application scope.

[0004] While there have been optimization explorations for the application of packing materials in the existing technology, such as high-efficiency absorption towers that combine spray and packed tower technologies, the desulfurization efficiency can approach 100% when using a single random or structured packing material. However, the inherent limitations of single packing materials have not been overcome. There are problems such as high resistance in the absorption zone and high risk of flooding. While pursuing high desulfurization efficiency, the existing single packing material technology is difficult to achieve synergistic optimization of low system resistance, low risk of flooding, and operating energy consumption. Utility Model Content

[0005] The present invention aims to provide a layered dynamic enhanced seawater desulfurization device to solve the problems of high operating costs, low safety coefficient due to flooding risk, and difficulty in balancing flue gas desulfurization efficiency and energy consumption in the prior art.

[0006] The embodiments of this utility model are implemented as follows: This utility model embodiment provides a layered dynamic enhanced seawater desulfurization device, which includes an absorption tower; The absorption tower is provided with a liquid outlet at the bottom, an air inlet on the outer bottom wall, a liquid inlet on the outer top wall, and an air outlet at the top. The absorption tower described above is equipped with, from bottom to top, a gas distributor, a packing support device, a dynamic packing layer, a packing layer partitioning device, a static packing layer, a packing layer fixing device, a spray layer, and a demister. The aforementioned packing layer support device, the aforementioned packing layer partitioning device, and the aforementioned packing layer fixing device all have several through grids or through holes, and the aforementioned spray layer is connected to the aforementioned liquid inlet.

[0007] In operation, seawater enters the spray layer of the absorption tower through the inlet, and the spray layer evenly sprays the seawater onto the static packing layer. Sulfur-containing flue gas enters the absorption tower through the inlet, and after being evenly distributed by the gas distributor, it impacts the dynamic packing layer above the packing layer support device, causing several of the floating lightweight packings to be in a localized fluidized state to enhance mass transfer, while simultaneously self-cleaning and preventing clogging. The flue gas continues to rise and enters the static packing layer through the packing layer partitioning device, where it comes into deep contact with the liquid film formed by the seawater on the packing surface for desulfurization. The purified flue gas passes through the packing layer fixing device, the spray layer to capture droplets, and the demister to remove mist before being discharged from the outlet. The desulfurized seawater is discharged from the outlet at the bottom of the absorption tower.

[0008] The layered dynamic enhanced seawater desulfurization device disclosed in this embodiment significantly improves the overall desulfurization performance through the synergistic effect of fluidization in the dynamic packing layer and uniform liquid film in the static packing layer. As a result, the layered dynamic enhanced seawater desulfurization device has the beneficial effects of improving desulfurization efficiency, completely eliminating flooding risks, significantly reducing system resistance, reducing operating energy consumption, enhancing safe operation stability, and facilitating the balance between flue gas desulfurization efficiency and energy consumption.

[0009] Optionally, the above-mentioned filler layer support device, the above-mentioned filler layer partitioning device and the above-mentioned filler layer fixing device all adopt grids or perforated plates, the opening diameter of the grids or perforated plates is 30mm to 70mm, and the opening rate is 35% to 70%.

[0010] This configuration, using a grid or perforated plate as the support device, partitioning device, and fixing device for the packing layer, and limiting the aperture to 30mm-70mm and the opening ratio to 35%-70%, can stably support both the dynamic and static packing layers, preventing packing escape or misalignment. It also ensures smooth flow of sulfur-containing flue gas and seawater between the packing layers, reducing fluid resistance. Simultaneously, it provides suitable space for the local fluidization of the packing in the dynamic packing layer, which is beneficial for leveraging the self-cleaning characteristics of the dynamic packing layer, reducing the risk of clogging, and facilitating the synergistic optimization of efficient mass transfer and low energy consumption.

[0011] Optionally, the interior of the aforementioned dynamic packing layer is provided with several floating lightweight packing materials.

[0012] With this configuration, several of the aforementioned floating lightweight packing materials are in a localized fluidized state under the action of the sulfur-containing flue gas flow. The mass transfer efficiency is enhanced by the formation of gas-liquid vortices through packing collisions. At the same time, self-cleaning is achieved by peeling off surface crystals through continuous collisions with gas and liquid, effectively reducing the risk of blockage and flooding. This improves desulfurization efficiency while reducing system resistance, supporting stable operation with high efficiency and low energy consumption.

[0013] Optionally, some of the above-mentioned floating lightweight packing materials are preferably, but not limited to, lightweight hollow spheres, and the packing density of some of the above-mentioned floating lightweight packing materials is 0.7 g / cm³. 3 ~0.9g / cm 3 Height 800mm~3000mm.

[0014] This configuration, through reasonable density and height design, ensures fluidization stability and mass transfer area, while the self-cleaning properties reduce clogging, which helps improve desulfurization efficiency and reduce system resistance and energy consumption.

[0015] Optionally, the above-mentioned static packing layer is provided with regular or random static packing inside, the porosity of the above-mentioned static packing layer is ≥60%, and the height is 500mm~3000mm.

[0016] This configuration ensures smooth flow of sulfur-containing flue gas, reducing resistance, while providing sufficient mass transfer area to extend gas-liquid contact time. Combined with the aforementioned dynamic packing layer, it achieves deep desulfurization, improves desulfurization efficiency, and filters particulate impurities from seawater, thus optimizing system stability.

[0017] Optionally, the height ratio of the above-mentioned dynamic packing layer to the above-mentioned static packing layer is 0.2 to 6.0.

[0018] This configuration, by limiting the height ratio of the dynamic packing layer to the static packing layer, balances the synergistic effect of mass transfer between the two, ensuring both the fluidized enhanced desulfurization and self-cleaning of the dynamic packing layer and the deep desulfurization and escape prevention of the static packing layer, thereby optimizing system efficiency, resistance, and stability.

[0019] Optionally, the gas distributor controls the sulfur-containing flue gas velocity to be 1.2 to 1.5 times the critical fluidization velocity of the packing.

[0020] This setup, by controlling the sulfur-containing flue gas velocity to 1.2 to 1.5 times the critical fluidization velocity, precisely drives the local fluidization of the aforementioned floating lightweight packing, enhancing gas-liquid mass transfer and self-cleaning, while avoiding excessively high flow velocities that would increase resistance, thus ensuring a balance between desulfurization efficiency and system energy consumption.

[0021] Optionally, the distance between the above-mentioned filler layer fixing device and the above-mentioned spray layer is 1000mm to 3000mm.

[0022] This configuration ensures that the sprayed seawater evenly covers the static packing layer, preventing seawater from flowing down rapidly through the gaps in the packing and ensuring that the seawater does not have sufficient contact with the packing surface or fail to effectively transfer mass with the rising sulfur-containing flue gas. This prolongs the gas-liquid contact time and provides a buffer space for the rising sulfur-containing flue gas, reducing system resistance and improving desulfurization efficiency.

[0023] Optionally, the distance between the gas distributor and the upper edge of the air inlet is 0mm to 3000mm.

[0024] This configuration, by limiting the distance between the gas distributor and the upper edge of the inlet, ensures that the sulfur-containing flue gas is fully and evenly distributed after entering through the gas distributor, forming a uniform microfluidic stream that impacts the dynamic packing layer, thus ensuring fluidization stability and mass transfer uniformity, reducing local resistance, and optimizing system operating efficiency.

[0025] Optionally, some of the above-mentioned floating lightweight packing materials are in a local fluidized state under the action of the sulfur-containing flue gas flow, and the amplitude of the above-mentioned floating lightweight packing materials is 30mm to 300mm.

[0026] This configuration, by limiting the local fluidization amplitude of several of the aforementioned floating lightweight packing materials, enhances gas-liquid vortex mass transfer. At the same time, it achieves self-cleaning through packing collision, stripping, and crystallization, reducing the risk of blockage and flooding, and improving desulfurization efficiency and system stability.

[0027] Optionally, the amplitude of some of the above-mentioned floating lightweight packing materials is preferably 50mm to 150mm.

[0028] This configuration ensures optimal self-cleaning, minimizes the risk of flooding and blockage, and maximizes desulfurization efficiency.

[0029] Optionally: the spray layer is installed on the inner wall of the absorption tower, the spray layer has a pipe and a number of nozzles, the number of nozzles are connected to the pipe and correspond to the packing layer fixing device, and the pipe is connected to the liquid inlet.

[0030] This configuration ensures that seawater is sprayed precisely and evenly onto the static packing layer, fully forming a liquid film to enhance mass transfer, improve desulfurization efficiency, and guarantee stable system operation.

[0031] Optionally, the gas distributor is fixed to the inner wall of the absorption tower.

[0032] This setup ensures stable flow uniformity of sulfur-containing flue gas, avoids affecting the fluidization state of the aforementioned floating lightweight packing materials due to shaking, and guarantees uniform mass transfer.

[0033] Optionally, the aforementioned packing layer support device is fixed to the inner wall of the aforementioned absorption tower.

[0034] With this configuration, the aforementioned packing layer support device can stably support the dynamic packing layer, prevent packing displacement from causing uneven gas-liquid distribution, and improve the system's operational stability.

[0035] Optionally, the packing layer partitioning device is fixed on the inner wall of the absorption tower.

[0036] With this configuration, the aforementioned packing layer partitioning device can accurately separate the dynamic packing layer and the static packing layer, effectively preventing cross-layer mixing and ensuring the effectiveness of the layered mass transfer design.

[0037] Optionally, the packing layer fixing device is fixed to the inner wall of the absorption tower.

[0038] With this configuration, the aforementioned packing layer fixing device can stably constrain the static packing layer, preventing it from being deformed by airflow impact and ensuring the stability of mass transfer area and path.

[0039] Optionally, the demister is fixed to the inner wall of the absorption tower.

[0040] With this configuration, the demister ensures stable demisting performance, prevents fog droplet entrainment that could lead to equipment corrosion, and extends system lifespan.

[0041] In summary, the layered dynamic enhanced seawater desulfurization device disclosed in this utility model has the beneficial effects of improving desulfurization efficiency, completely eliminating flooding risks, significantly reducing system resistance, reducing operating energy consumption, enhancing safe operation stability, and facilitating the balance between flue gas desulfurization efficiency and energy consumption. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of a layered dynamic enhancement seawater desulfurization device according to an embodiment of the present invention.

[0044] Icons: 1-Absorption tower, 2-Liquid outlet, 3-Air inlet, 4-Liquid inlet, 5-Air outlet, 6-Gas distributor, 7-Packing layer support device, 8-Dynamic packing layer, 9-Packing layer partitioning device, 10-Static packing layer, 11-Packing layer fixing device, 12-Spray layer, 13-Demister, 14-Floating lightweight packing, 15-Static packing, 16-Pipeline, 17-Spray head. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] Example 1 See Figure 1 This embodiment proposes a layered dynamic enhanced seawater desulfurization device, including an absorption tower 1; The bottom end of the absorption tower 1 is provided with a liquid outlet 2, the outer bottom wall of the absorption tower 1 is provided with an air inlet 3, the outer top wall of the absorption tower 1 is provided with a liquid inlet 4, and the top of the absorption tower 1 is provided with an air outlet 5. The absorption tower 1 is equipped with, from bottom to top, a gas distributor 6, a packing layer support device 7, a dynamic packing layer 8, a packing layer partitioning device 9, a static packing layer 10, a packing layer fixing device 11, a spray layer 12, and a demister 13. Gas distributor 6, packing layer support device 7, packing layer partitioning device 9, packing layer fixing device 11 and demister 13 are all fixedly installed on the inner wall of absorption tower 1. The packing layer support device 7, packing layer partitioning device 9 and packing layer fixing device 11 each have several through grids (not shown in the figure) or through holes (not shown in the figure). Spray layer 12 is connected to liquid inlet 4.

[0048] In operation, seawater enters the spray layer 12 of the absorption tower 1 through the inlet 4, and the spray layer 12 sprays the seawater evenly onto the static packing layer 10. Sulfur-containing flue gas enters the absorption tower 1 through the inlet 3. After being evenly distributed by the gas distributor 6, the sulfur-containing flue gas impacts the dynamic packing layer 8 above the packing layer support device 7, causing several floating lightweight packings 14 to be in a local fluidized state to enhance mass transfer, while also self-cleaning and preventing clogging. The flue gas continues to rise and enters the static packing layer 10 through the packing layer partitioning device 9, where it comes into deep contact with the liquid film formed by the seawater on the packing surface for desulfurization. The purified flue gas passes through the packing layer fixing device 11 and the spray layer 12 to capture droplets and the demister 13 to remove mist before being discharged from the outlet 5. The desulfurized seawater is discharged from the outlet 2 at the bottom of the absorption tower 1.

[0049] The layered dynamic enhanced seawater desulfurization device disclosed in this embodiment significantly improves the overall desulfurization performance through the synergistic effect of fluidization in the dynamic packing layer 8 and uniform liquid film in the static packing layer 10. As a result, the layered dynamic enhanced seawater desulfurization device has the beneficial effects of improving desulfurization efficiency, completely eliminating flooding risks, significantly reducing system resistance, reducing operating energy consumption, enhancing safe operation stability, and facilitating the balance between flue gas desulfurization efficiency and energy consumption.

[0050] See Figure 1 The packing layer support device 7, the packing layer partitioning device 9, and the packing layer fixing device 11 all adopt grids or perforated plates. The opening diameter of the grids or perforated plates is 30mm to 70mm, and the opening ratio is 35% to 70%. By using grids or perforated plates as the packing layer support device 7, the packing layer partitioning device 9, and the packing layer fixing device 11, and limiting the opening diameter to 30mm to 70mm and the opening ratio to 35% to 70%, it can stably support the dynamic packing layer 8 and the static packing layer 10, prevent the packing from escaping or misaligning, and ensure the smooth flow of sulfur-containing flue gas and seawater between the packing layers, reducing fluid resistance. At the same time, it provides suitable space for the local fluidization of the packing in the dynamic packing layer 8, which is conducive to cooperating with the self-cleaning characteristics of the dynamic packing layer 8, reducing the risk of blockage, and facilitating the synergistic optimization of efficient mass transfer and low energy consumption.

[0051] The interior of the dynamic packing layer 8 is provided with several floating lightweight packings 14. Under the action of the airflow of sulfur-containing flue gas, the floating lightweight packings 14 are in a local fluidized state. The mass transfer efficiency is enhanced by the formation of gas-liquid vortices through packing collision. At the same time, self-cleaning is achieved by peeling off surface crystals through continuous collision with gas and liquid, effectively reducing the risk of blockage and flooding. While improving desulfurization efficiency, the system resistance is reduced, supporting stable operation with high efficiency and low energy consumption.

[0052] The floating lightweight packing material 14 preferably includes, but is not limited to, lightweight hollow spheres, and the packing density of the floating lightweight packing material 14 is 0.7 g / cm³. 3 ~0.9g / cm 3With a height of 800mm to 3000mm, this reasonable density and height design ensures fluidization stability and mass transfer area. Combined with self-cleaning properties to reduce clogging, it helps to improve desulfurization efficiency and reduce system resistance and energy consumption.

[0053] See Figure 1 The static packing layer 10 has regular or random static packing 15 inside. The porosity of the static packing layer 10 is ≥60%, and the height is 500mm~3000mm. This can ensure the smooth flow of sulfur-containing flue gas and reduce resistance, while providing sufficient mass transfer area to extend gas-liquid contact time. Together with the dynamic packing layer 8, it can achieve deep desulfurization, improve desulfurization efficiency, and filter particulate impurities in seawater, thus optimizing system stability.

[0054] The height ratio of the dynamic packing layer 8 to the static packing layer 10 is 0.2 to 6.0. By limiting the height ratio of the dynamic packing layer 8 to the static packing layer 10, the synergistic effect of mass transfer between the two is balanced, which ensures both the fluidized enhanced desulfurization and self-cleaning of the dynamic packing layer 8 and the deep desulfurization and escape prevention of the static packing layer 10, thereby optimizing the system efficiency, resistance and stability.

[0055] The gas distributor 6 controls the sulfur-containing flue gas velocity to be 1.2 to 1.5 times the critical fluidization velocity of the packing. By controlling the sulfur-containing flue gas velocity to be 1.2 to 1.5 times the critical fluidization velocity, the floating lightweight packing 14 is precisely driven to local fluidize, which enhances gas-liquid mass transfer and self-cleaning, while avoiding excessive flow velocity that increases resistance, thus ensuring a balance between desulfurization efficiency and system energy consumption.

[0056] See Figure 1 The distance between the packing layer fixing device 11 and the spray layer 12 is 1000mm to 3000mm. This ensures that the sprayed seawater evenly covers the static packing layer 10, avoids the seawater from flowing down quickly through the gaps in the packing, avoids the seawater not being in full contact with the packing surface or not effectively transferring mass with the rising sulfur-containing flue gas, prolongs the gas-liquid contact time, and at the same time reserves a buffer space for the rising sulfur-containing flue gas, reduces system resistance, and improves desulfurization efficiency.

[0057] The distance between the upper edge of the gas distributor 6 and the air inlet 3 is 0mm to 3000mm. By limiting the distance between the upper edge of the gas distributor 6 and the air inlet 3, it is ensured that the sulfur-containing flue gas is fully and evenly distributed after entering through the gas distributor 6, forming a uniform microflow stream that impacts the dynamic packing layer 8, thus ensuring fluidization stability and mass transfer uniformity, reducing local resistance, and optimizing system operating efficiency.

[0058] Several floating lightweight packing materials 14 are in a local fluidized state under the action of the sulfur-containing flue gas flow. The amplitude of the floating lightweight packing materials 14 is 30mm to 300mm. By limiting the local fluidization amplitude of the floating lightweight packing materials 14, the gas-liquid vortex mass transfer is enhanced. At the same time, self-cleaning is achieved by packing collision stripping crystallization, reducing the risk of blockage and flooding, and improving desulfurization efficiency and system stability.

[0059] See Figure 1 The amplitude of the floating lightweight packing 14 is preferably 50mm to 150mm, which can ensure optimal self-cleaning, minimize the risk of blockage and flooding, and maximize desulfurization efficiency.

[0060] The spray layer 12 is installed on the inner wall of the absorption tower 1. The spray layer 12 has a pipe 16 and several nozzles 17. The nozzles 17 are connected to the pipe 16 and correspond to the packing layer fixing device 11. The pipe 16 is connected to the liquid inlet 4. This ensures that seawater is sprayed accurately and evenly onto the static packing layer 10, fully forming a liquid film to enhance mass transfer, improve desulfurization efficiency, and ensure stable system operation.

[0061] See Figure 1 The gas distributor 6 is fixed on the inner wall of the absorption tower 1 to ensure stable flow of sulfur-containing flue gas, avoid affecting the fluidization state of some floating light packing 14 due to shaking, and ensure mass transfer uniformity.

[0062] The packing layer support device 7 is fixed on the inner wall of the absorption tower 1. The packing layer support device 7 can stably support the dynamic packing layer 8, prevent packing displacement from causing uneven gas-liquid distribution, and improve the system's operational stability.

[0063] The packing layer partitioning device 9 is fixed on the inner wall of the absorption tower 1. The packing layer partitioning device 9 can accurately separate the dynamic packing layer 8 and the static packing layer 10, effectively avoiding cross-layer mixing and ensuring the efficiency of the layered mass transfer design.

[0064] The packing layer fixing device 11 is fixed on the inner wall of the absorption tower 1. The packing layer fixing device 11 can stably constrain the static packing layer 10, prevent it from being deformed by airflow impact, and ensure the stability of mass transfer area and path.

[0065] The demister 13 is fixed on the inner wall of the absorption tower 1. The demister 13 ensures the stability of the demisting effect, avoids the entrainment of mist droplets that could lead to equipment corrosion, and extends the system life.

[0066] See Figure 1 The specific desulfurization principle of the layered dynamic enhanced seawater desulfurization device in this embodiment is as follows: Seawater passes through the spray layer 12 from top to bottom, sequentially through the packing layer fixing device 11, the static packing layer 10, the packing layer partitioning device 9, the dynamic packing layer 8, and the packing layer support device 7. High-temperature flue gas enters from the flue gas inlet 3 at the bottom of the absorption tower 1, and through the porous gas distributor 6, the airflow is evenly divided into micro-streams, with the flow velocity controlled at 1.2-1.5 times the critical fluidization velocity of the dynamic packing. The rising flue gas impacts the dynamic packing layer 8, and several floating lightweight packing materials 14 undergo localized fluidization under the action of the airflow. The collision of the packing materials generates gas-liquid vortices, enhancing the gas-liquid film mass transfer coefficient and improving desulfurization efficiency. The dynamic packing layer 8 experiences continuous high-intensity impact with the gas and liquid, which can effectively strip away surface crystals such as CaSO3 / CaSO4, facilitating self-cleaning of the packing and reducing the risk of scale blockage and flooding caused by long-term operation. The flue gas continues to enter the static packing layer 10 through the packing layer partitioning device 9, where the resistance increases relatively and the flow velocity drops sharply. Seawater forms a uniform liquid film on the surface of the regular or scattered packing, effectively extending the gas-liquid countercurrent contact time and significantly improving the desulfurization effect. Finally, after the flue gas passes through the top spray layer 12 to capture escaped droplets and the demister 13 to capture mist droplets, the purified flue gas is discharged from the outlet 5 at the top of the absorption tower 1.

[0067] Example 2 See Figure 1 Based on Example 1, this example uses a seawater desulfurization project of a coal-fired power unit as an example, applying this device (tower diameter 16m): the dynamic packing layer 8 uses PP hollow spherical packing (Φ35mm, density 0.85g / cm³). 3 The upper static packing layer 10 is a PP corrugated structured packing (75% porosity, 1500mm high), which completes deep desulfurization when the flow velocity drops to 0.9m / s. The upper static packing layer 10 is a PP corrugated structured packing (75% porosity, 1500mm high).

[0068] The actual test results showed that the desulfurization efficiency reached 99.9%, and the SO2 concentration in the clean flue gas was 16 mg / Nm³. 3 (More than 54% better than my country's ultra-low emission standards), system resistance is only 790Pa, and it can run continuously for 8,500 hours without scale buildup.

[0069] Comparative Example 1 Using a conventional static tower with the same parameters (randomly packed Pall rings), the measured results showed a desulfurization efficiency of 96.0% and a resistance of 1310 Pa. After 3300 hours of operation, the tower was shut down due to flooding caused by 3 mm of scale buildup in the packing layer.

[0070] Comparative Example 2 Using a conventional static tower with the same parameters (structured PP corrugated packing), the measured results showed a desulfurization efficiency of 98.5% and a resistance of 950 Pa. After 4000 hours of operation, a dense CaSO4 scale layer formed on the packing surface, causing the pressure drop to rise to 1420 Pa and the desulfurization efficiency to decrease to 94.8%.

[0071] Therefore, through comparison, it is proven that this solution, through dynamic laminar flow design, simultaneously solves efficiency bottlenecks, high energy consumption, and blockage risks.

[0072] In summary, the dynamic packing layer 8's turbulent enhanced mass transfer and self-cleaning characteristics enable desulfurization efficiency to exceed 99.5%, with the outlet SO2 concentration consistently below 20 mg / m³. 3 At the same time, it completely eliminates the risk of flooding caused by blockage; the flue gas velocity in the static layer drops sharply due to the influence of the fixed packing, and a uniform liquid film is formed on the surface of the packing, achieving deep desulfurization. Meanwhile, the static packing layer 10 also serves as an escape barrier for several floating lightweight packings 14, effectively improving the system's safe operation coefficient. Combined with the adaptive porosity design of the dynamic packing layer 8, the system achieves a pressure drop of 650Pa to 750Pa, which is 30%-50% lower than that of traditional packed towers, and the overall energy consumption is reduced by more than 30%, filling the technological gap in the field of seawater desulfurization for efficient, low-energy, and safe operation.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A layered, dynamically enhanced seawater desulfurization device, characterized in that: Including the absorption tower (1); The bottom end of the absorption tower (1) is provided with a liquid outlet (2), the outer bottom wall of the absorption tower (1) is provided with an air inlet (3), the outer top wall of the absorption tower (1) is provided with a liquid inlet (4), and the top end of the absorption tower (1) is provided with an air outlet (5). The absorption tower (1) is provided with a gas distributor (6), a packing layer support device (7), a dynamic packing layer (8), a packing layer partitioning device (9), a static packing layer (10), a packing layer fixing device (11), a spray layer (12), and a demister (13) from bottom to top. The packing layer support device (7), the packing layer partitioning device (9), and the packing layer fixing device (11) all have several through grids or through holes, and the spray layer (12) is connected to the liquid inlet (4).

2. The layered dynamic enhanced seawater desulfurization device according to claim 1, characterized in that: The filler layer support device (7), the filler layer partitioning device (9), and the filler layer fixing device (11) all adopt grids or perforated plates. The opening diameter of the grids or perforated plates is 30mm to 70mm, and the opening rate is 35% to 70%.

3. The layered dynamic enhanced seawater desulfurization device according to claim 1, characterized in that: The interior of the dynamic packing layer (8) is provided with several floating lightweight packing materials (14).

4. The layered dynamic enhanced seawater desulfurization device according to claim 3, characterized in that: Some of the floating lightweight packing materials (14) are lightweight hollow spheres, and the packing density of some of the floating lightweight packing materials (14) is 0.7 g / cm³. 3 ~0.9g / cm 3 Height 800mm~3000mm.

5. A layered dynamic enhanced seawater desulfurization device according to claim 4, characterized in that: The static filler layer (10) is provided with regular or random static filler (15) inside. The porosity of the static filler layer (10) is ≥60%, and the height is 500mm~3000mm.

6. The layered dynamic enhanced seawater desulfurization device according to claim 1, characterized in that: The height ratio of the dynamic packing layer (8) to the static packing layer (10) is 0.2 to 6.

0.

7. The layered dynamic enhanced seawater desulfurization device according to claim 1, characterized in that: The gas distributor (6) controls the sulfur-containing flue gas flow rate to be 1.2 to 1.5 times the critical fluidization velocity of the packing.

8. The layered dynamic enhanced seawater desulfurization device according to claim 1, characterized in that: The distance between the filler layer fixing device (11) and the spray layer (12) is 1000mm to 3000mm.

9. A layered dynamic enhanced seawater desulfurization device according to claim 1, characterized in that: The distance between the upper edge of the gas distributor (6) and the air inlet (3) is 0mm to 3000mm.

10. A layered dynamic enhanced seawater desulfurization device according to claim 3, characterized in that: Several of the floating lightweight packing materials (14) are in a local fluidized state under the action of the sulfur-containing flue gas flow, and the amplitude of several of the floating lightweight packing materials (14) is 30mm to 300mm.

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