A new type of biomimetic seawater desulfurization aeration oxidation system

Abstract

The utility model belongs to seawater flue gas desulfurization technology field, especially relates to a kind of novel bionic seawater desulfurization aeration oxidation system.The technical scheme is as follows: a kind of novel bionic seawater desulfurization aeration oxidation system, including aeration tank, aeration tank is equipped with aeration fan, aeration fan is connected with aeration main pipe, aeration tank bottom is equipped with main stem, and a plurality of longitudinal aeration branch pipes are connected between main stem and aeration main pipe, the both sides of main stem are connected with a plurality of first branch pipes, the both sides of first branch pipe are connected with a plurality of second branch pipes, and a plurality of aeration holes are provided on second branch pipe;From the end of second branch pipe close to first branch pipe to the tip of second branch pipe, the aperture of aeration hole gradually reduces, and the density of aeration hole gradually increases.The utility model provides a kind of novel bionic seawater desulfurization aeration oxidation system to optimize gas-liquid mixing path, reduce energy loss, significantly improve system stability and economy.

Description

Technical Field

[0001] This utility model belongs to the field of seawater flue gas desulfurization technology, and specifically relates to a novel biomimetic seawater desulfurization aeration oxidation system. Background Technology

[0002] Seawater flue gas desulfurization (FGD) technology has become the preferred desulfurization process in coastal areas due to its advantages such as low operating costs and no solid waste generation. The seawater restoration system is crucial in this process, responsible for treating the desulfurized seawater to meet water quality standards before discharge. The core of the treatment lies in removing the unstable intermediate product sulfite (SO32-) generated during the desulfurization process. 2- Effectively oxidized to stable sulfate (SO4) 2- To avoid secondary pollution caused by SO2 release under acidic conditions and to ensure that the discharged water meets environmental protection standards, it is necessary to neutralize the acidity of the desulfurized seawater through aeration, restore its pH value (to 6.5-8.5) and dissolved oxygen (DO) level, and protect the marine ecosystem.

[0003] However, traditional aeration oxidation technology faces significant challenges in practical applications: its oxidation efficiency is easily affected by fluctuations in seawater temperature, salinity, and dissolved oxygen concentration, and it generally suffers from uneven bubble distribution and low oxygen transfer efficiency. Especially in high-salinity environments, scaling and clogging of aeration holes occur frequently, leading to frequent system shutdowns for maintenance, which seriously affects operational stability and economy. Although existing technologies offer improved solutions such as stratified aeration (patent CN113429025B) or floating aeration (CN222064237U) to cope with tidal changes, they still suffer from drawbacks such as system complexity, reliance on compensation devices, difficult installation and maintenance, or high energy consumption. 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 novel biomimetic seawater desulfurization aeration oxidation system to optimize the gas-liquid mixing path, reduce energy loss, and significantly improve the system stability and economy.

[0005] The technical solution adopted in this utility model is as follows: A novel biomimetic seawater desulfurization aeration oxidation system includes an aeration tank, an aeration fan installed on the aeration tank, an aeration main pipe connected to the aeration fan, a main trunk installed at the bottom of the aeration tank, several longitudinal aeration branch pipes connected between the main trunk and the aeration main pipe, several primary branch pipes connected to both sides of the main trunk, several secondary branch pipes connected to both sides of the primary branch pipes, and several aeration holes provided on the secondary branch pipes; from the end of the secondary branch pipe near the primary branch pipe to the tip of the secondary branch pipe, the diameter of the aeration holes gradually decreases and the density of the aeration holes gradually increases.

[0006] This invention utilizes a main trunk, several primary branch pipes, and several secondary branch pipes to form a fractal aeration network. This network, through tiered pressure reduction, ensures uniform pressure at the end (difference <5%), avoiding localized high-pressure zones found in traditional grid layouts. The density of aeration holes on the lower surface of the secondary branch pipes increases along the fractal dimension, compensating for air volume attenuation in edge regions. Optimized branch angles reduce eddy generation, resulting in a smoother bubble ascent path and a 15%–20% longer residence time in water. This biomimetic aeration design enhances gas-liquid mass transfer efficiency and reduces energy loss, significantly improving system stability and economy.

[0007] As a preferred embodiment of this utility model, the angle between the primary branch pipe and the main trunk is 60° to 75°, and several primary branch pipes on the same side are evenly distributed on the main trunk.

[0008] As a preferred embodiment of this utility model, the diameter of the secondary branch pipe gradually decreases in the direction away from the primary branch pipe.

[0009] As a preferred embodiment of this utility model, the angle between the secondary branch pipe and the primary branch pipe is 45° to 60°, and several secondary branch pipes on the same side are evenly distributed on the primary branch pipe.

[0010] As a preferred embodiment of this utility model, the fractal dimension D of the pipe network composed of the main trunk, several primary branch pipes and several secondary branch pipes is 1.5 to 1.8.

[0011] As a preferred embodiment of this utility model, the aeration main pipe is located at a position more than 1.0m above the liquid surface of the aeration tank.

[0012] As a preferred embodiment of this utility model, the aeration main pipe, longitudinal aeration branch pipe, main trunk, primary branch pipe and secondary branch pipe are all made of fiberglass.

[0013] As a preferred embodiment of this utility model, a butterfly valve is provided on the longitudinal aeration branch pipe.

[0014] As a preferred embodiment of this utility model, the bottom of the aeration tank is provided with several supports for the main trunk, primary branch pipes and secondary branch pipes.

[0015] As a preferred embodiment of this utility model, a support is provided every 3 to 4 meters along the main trunk, supports are provided in the middle and at the end of the primary branch pipes, and supports are provided in the middle of the secondary branch pipes.

[0016] The beneficial effects of this utility model are as follows: This invention utilizes a main trunk, several primary branch pipes, and several secondary branch pipes to form a fractal aeration network. This network, through tiered pressure reduction, ensures uniform pressure at the end (difference <5%), avoiding localized high-pressure zones found in traditional grid layouts. The density of aeration holes on the lower surface of the secondary branch pipes increases along the fractal dimension, compensating for air volume attenuation in edge regions. Optimized branch angles reduce eddy generation, resulting in a smoother bubble ascent path and a 15%–20% longer residence time in water. This biomimetic aeration design enhances gas-liquid mass transfer efficiency and reduces energy loss, significantly improving system stability and economy. Attached Figure Description

[0017] Figure 1 This is a top view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of a secondary branch pipe.

[0018] In the diagram: 1-Aeration blower; 2-Aeration tank; 3-Aeration main pipe; 4-Longitudinal aeration branch pipe; 5-Main trunk; 6-Primary branch pipe; 7-Secondary branch pipe; 8-Butterfly valve; 9-Support; 10-Aeration hole. 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 Figures 1-3As shown, the novel biomimetic seawater desulfurization aeration oxidation system of this embodiment includes an aeration tank 2, an aeration blower 1 installed on the aeration tank 2, an aeration main pipe 3 connected to the aeration blower 1, a main trunk 5 installed at the bottom of the aeration tank 2, a number of longitudinal aeration branch pipes 4 connected between the main trunk 5 and the aeration main pipe 3, a number of primary branch pipes 6 connected to both sides of the main trunk 5, a number of secondary branch pipes 7 connected to both sides of the primary branch pipes 6, and a number of aeration holes 10 provided on the secondary branch pipes 7; from the end of the secondary branch pipe 7 near the primary branch pipe 6 to the tip of the secondary branch pipe 7, the diameter of the aeration holes 10 gradually decreases and the density of the aeration holes 10 gradually increases.

[0022] In the biomimetic aeration network, the main trunk 5 serves as the primary air source channel, with a diameter of DN800, extending 20m along the long axis of the pool. Secondary branches, forming primary branch pipes 6 at a 60° angle to the main trunk 5, have a diameter of DN500. The spacing between primary branch pipes 6 on the same side is 1 / 5 of the length of the main trunk 5. Further branching occurs on both sides of the primary branch pipes 6, extending into secondary branch pipes 7. The diameter of these secondary branch pipes gradually decreases from the point of connection with the primary branch (DN250-DN150-DN100). The spacing between secondary branch pipes 7 on the same side is 1 / 3 of the length of the primary branch pipe 6, and the angle decreases to 50°, forming the final vein-like aeration network.

[0023] Furthermore, gradient aeration holes 10 are opened on the lower surface of the secondary branch pipe 7, gradually decreasing in size from the end of the secondary branch pipe 7 (near the connection point with the primary branch pipe 6) to the tip. The initial hole diameter at the end is 8 mm, and the minimum hole diameter at the tip is 3 mm. The hole density gradually increases from the end to the tip, balancing the air pressure distribution. The fractal dimension D of the overall pipe network design is 1.7, effectively simulating the space-filling efficiency of leaf veins and balancing the coverage density and flow resistance.

[0024] like Figure 2 As shown, in the novel biomimetic seawater desulfurization aeration oxidation system, the main aeration pipe 3 is located approximately 1.5m above the liquid surface on one side of the aeration tank 2, with a diameter of DN1200. The main aeration pipe 3 connects to six longitudinal aeration branch pipes 4, each with a diameter of DN600. These branch pipes 4 are then connected to the main trunk 5 of the biomimetic aeration network, forming the final aeration network. The entire network layout is clearly hierarchical, with optimized paths, and significantly lower installation complexity than traditional staggered grids. The main aeration pipe 3, the longitudinal aeration branch pipes 4, and the tertiary branch pipes of the biomimetic aeration network are all made of FRP. Each longitudinal aeration branch pipe 4 is equipped with a butterfly valve 8 to ensure balanced aeration across all branch pipes while allowing for switching between opening and closing the branch pipes.

[0025] Support brackets 9 are installed on the three-stage leaf-vein-shaped branch pipes of the biomimetic aeration pipe network to provide support. One support bracket 9 is installed every 3-4 meters on the main branch 5; supports 9 are installed in the middle and at the ends of the first-stage branch pipes 6; and supports 9 are installed in the middle of the second-stage branch pipes 7. This ensures that all pipes are stable under water flow impact, with uniform stress distribution and no sagging or vibration. The support brackets 9 are made of stainless steel.

[0026] Taking a 150MW coal-fired unit as an example, the seawater restoration system is equipped with two aeration blowers (centrifugal blowers, one in operation and one on standby), with a blower air volume of 25000Nm. 3 / h, wind pressure is 32kPa. Connect aeration header 3 to aeration blower 1. In practical applications, compared with the traditional grid layout, under the same seawater flow rate and the same blower air volume, the SO3 in the outlet seawater is reduced. 2- The residual concentration decreased from an average of 15–20 mg / L before the modification to <5 mg / L, significantly improving oxidation efficiency. The hydraulic retention time required to meet standards was reduced by approximately 18%, meaning increased treatment capacity with the same tank volume. The biomimetic leaf-vein-shaped pipe network with staged pressure reduction and optimized flow channel design significantly reduced system resistance. The measured blower outlet pressure requirement decreased from 32 kPa before the modification to 30 kPa, and the blower current decreased by approximately 8%, resulting in considerable annual energy savings.

[0027] This invention effectively solves the problems of uneven bubble distribution, high energy consumption, and complex stress concentration in traditional aeration systems, significantly improving the efficiency, stability, and economy of seawater desulfurization aeration systems. The technical solution is clear, highly feasible, and effective, possessing significant potential for widespread application. When using this aeration device, the water level in aeration tank 2 can be designed to fluctuate according to the offshore tide level as much as possible, minimizing energy loss in the unit's circulating water system, saving operating costs, and thus improving the project's economic benefits. The device can also be adjusted in depth according to actual conditions to correct design parameters and achieve the most economical operating scheme.

[0028] The main trunk 5, several primary branch pipes 6, and several secondary branch pipes 7 of this invention form a fractal aeration network. This fractal aeration network, through tiered pressure reduction, ensures uniform pressure at the end (difference <5%), avoiding localized high-pressure zones found in traditional grid layouts. The density of aeration holes 10 on the lower surface of the secondary branch pipes 7 increases according to the fractal dimension, compensating for air volume attenuation in edge regions. Optimized branch angles reduce eddy generation, resulting in a smoother bubble rising path and a 15%–20% longer residence time in water. This invention, through its biomimetic aeration design, enhances gas-liquid mass transfer efficiency and reduces energy loss, significantly improving system stability and economy.

[0029] 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 novel biomimetic seawater desulfurization aeration oxidation system, characterized in that: The aeration tank (2) is equipped with an aeration blower (1), which is connected to an aeration main pipe (3). A main trunk (5) is installed at the bottom of the aeration tank (2). Several longitudinal aeration branch pipes (4) are connected between the main trunk (5) and the aeration main pipe (3). Several primary branch pipes (6) are connected to both sides of the main trunk (5). Several secondary branch pipes (7) are connected to both sides of the primary branch pipes (6). Several aeration holes (10) are provided on the secondary branch pipes (7). From the end of the secondary branch pipe (7) close to the primary branch pipe (6) to the tip of the secondary branch pipe (7), the diameter of the aeration holes (10) gradually decreases and the density of the aeration holes (10) gradually increases.

2. The novel biomimetic seawater desulfurization aeration oxidation system according to claim 1, characterized in that: The angle between the primary branch pipe (6) and the main trunk (5) is 60° to 75°, and several primary branch pipes (6) on the same side are evenly distributed on the main trunk (5).

3. The novel biomimetic seawater desulfurization aeration oxidation system according to claim 1, characterized in that: In the direction away from the primary branch pipe (6), the diameter of the secondary branch pipe (7) gradually decreases.

4. The novel biomimetic seawater desulfurization aeration oxidation system according to claim 1, characterized in that: The angle between the secondary branch pipe (7) and the primary branch pipe (6) is 45° to 60°, and several secondary branch pipes (7) on the same side are evenly distributed on the primary branch pipe (6).

5. The novel biomimetic seawater desulfurization aeration oxidation system according to claim 1, characterized in that: The fractal dimension D of the pipeline network composed of the main trunk (5), several primary branch pipes (6) and several secondary branch pipes (7) is 1.5 to 1.

8.

6. The novel biomimetic seawater desulfurization aeration oxidation system according to claim 1, characterized in that: The aeration main pipe (3) is located at a position 1.0m or more above the liquid surface of the aeration tank (2).

7. The novel biomimetic seawater desulfurization aeration oxidation system according to claim 1, characterized in that: The aeration main pipe (3), longitudinal aeration branch pipe (4), main trunk (5), primary branch pipe (6) and secondary branch pipe (7) are all made of fiberglass.

8. The novel biomimetic seawater desulfurization aeration oxidation system according to claim 1, characterized in that: A butterfly valve (8) is provided on the longitudinal aeration branch pipe (4).

9. A novel biomimetic seawater desulfurization aeration oxidation system according to claim 1, characterized in that: The bottom of the aeration tank (2) is provided with several supports (9) for supporting the main trunk (5), primary branch pipe (6) and secondary branch pipe (7).

10. A novel biomimetic seawater desulfurization aeration oxidation system according to claim 9, characterized in that: The main trunk (5) is equipped with a support (9) every 3-4m, the first-level branch pipe (6) is equipped with a support (9) in the middle and at the end, and the second-level branch pipe (7) is equipped with a support (9) in the middle.

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