Marine organism prevention and corrosion prevention method for offshore wind turbine foundation

Abstract

The invention provides a marine organism prevention and corrosion prevention method for an offshore wind turbine foundation, 3-30 layers of marine organism adhesion films are attached to the outer wall of the offshore wind turbine foundation, and the 3-30 layers of marine organism adhesion films as well as the innermost layer of marine organism adhesion film and the offshore wind turbine foundation are bonded through waterproof glue. The method is simple in construction, installation and use method and high in utilization effect, basically has no rigid requirements on the shapes of sea areas and underwater structures, can be used for single-pile foundations, jacket foundations and floating foundations, is convenient for flexibly applying the change conditions of marine organisms under the action of gravity, buoyancy and water flow force to control the falling condition of marine organism attachment films, and is suitable for large-scale popularization and application. And meanwhile, the anti-corrosion effect on the underwater structure is achieved, multiple purposes are achieved, resources are saved to the maximum extent, the utilization rate is increased, and good economical efficiency and practicability are achieved.

Description

Technical Field

[0001] The invention relates to a method for preventing marine organisms and corrosion of an offshore wind turbine foundation, belonging to the technical field of marine corrosion prevention using layered materials. Background Art

[0002] With the rapid development of social economy, the demand for energy in countries around the world has increased dramatically. In order to solve the depletion of non-renewable energy resources and the deteriorating environment, it has become a consensus among countries around the world to find renewable and clean new energy. As the main body that occupies 70% of the earth's area, the ocean not only has rich resources such as aquatic products and oil, but also contains huge energy. Offshore wind power, a marine energy, has developed rapidly and on a large scale. Marine organisms and their secretions have a great impact on underwater structures themselves and their associated structures. At the same time, seawater also has a great corrosion effect on underwater structures. In order to reduce the corrosion of underwater structures by seawater and the damage caused by the attachment of marine organisms to the structures themselves, as well as the indirect economic losses to their related functional areas, the main methods currently used are machine demolition, ultrasonic technology, etc. These methods have the characteristics of high cost and low effect. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a method for preventing and controlling marine growth and corrosion of offshore wind turbine foundations. The method for preventing and controlling marine growth and corrosion of offshore wind turbine foundations has the characteristics of simple construction, installation and use, saving resources to the greatest extent, increasing utilization rate, and greatly reducing the cost of treating corrosion of underwater structures and attachment of marine growth, and has good economy and practicality.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a method for preventing and controlling marine organisms and corrosion of an offshore wind turbine foundation. 3 to 30 layers of marine organism attachment films are attached to the outer wall of the offshore wind turbine foundation. The 3 to 30 layers of marine organism attachment films and the innermost layer of marine organism attachment films and the offshore wind turbine foundation are bonded by waterproof adhesive.

[0006] The marine biofouling film is a waterproof and degradable film.

[0007] The marine biofouling film is applied in a staggered manner between every two layers.

[0008] The marine biological attachment film is a dense layer of polygonal small blocks spliced ​​together, and the center position of each outer layer of marine biological attachment film small block is directly opposite to the top corner position of the connection seam of the inner layer of marine biological attachment film.

[0009] The marine biological attachment film is in the shape of a triangle, a quadrilateral or a hexagon.

[0010] The 3 to 30 layers of marine biofouling films are installed before the offshore wind turbine foundation is transported.

[0011] Among the 3 to 30 layers of marine biofouling films, the bonding strength of the outermost layer of marine biofouling films is higher than the bonding strength of any other layers of marine biofouling films.

[0012] The marine biological attachment film is made of PVA-CBA plastic.

[0013] The beneficial effects of the present invention are as follows: the construction, installation and use methods are simple, the utilization effect is high, and there is basically no rigid requirement on the sea area and the shape of the underwater structure. No matter it is a single pile foundation, a jacket foundation or a floating foundation, it can be used, and it is convenient to flexibly apply the changes of marine organisms under the action of gravity, buoyancy and water flow to control the shedding of the marine organism attachment film, and at the same time, it has an anti-corrosion effect on the underwater structure, so that one thing can be used for multiple purposes, resources can be saved to the greatest extent, the utilization rate can be increased, and it has good economy and practicality; it can effectively isolate the direct contact between the structural foundation and the seawater, and can improve the anti-corrosion ability of the structure and improve the safety of the structure; it is suitable for any underwater steel structure and other foundations, and has no requirements on the water depth, water area and structural shape, and has very wide practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structural principle of at least one embodiment of the present invention;

[0015] Figure 2 yes Figure 1 Schematic diagram of the hierarchical structure;

[0016] Figure 3 yes Figure 2 Schematic diagram of the structure of biofilm in China;

[0017] Figure 4 yes Figure 2 or Figure 3 Schematic diagram of the inner surface of a small piece of biofilm in the sea;

[0018] Figure 5 yes Figure 2 Schematic diagram of the splicing principle of biofilm in China;

[0019] Figure 6 yes Figure 2 Schematic diagram of the structure of the mesocean organisms attached to the upper zone;

[0020] Figure 7 yes Figure 2 Schematic diagram of the structure of the mesocean organisms attached to the lower zone;

[0021] Figure 8 yes Figure 2 Schematic diagram of the structure of the marine organisms attached to the two side areas.

[0022] In the figure: 1-marine organism attachment membrane, 2-marine organism attachment membrane connection seam, 1.1-first layer of marine organism attachment membrane, 3-wind turbine foundation structure, 1.2-second layer of marine organism attachment membrane, 4-attachment membrane bonding waterproof glue, 1.3-third layer of marine organism attachment membrane, 5.1-marine organisms mainly distributed in the upper area of ​​the attachment membrane, 5.2-marine organisms mainly distributed in the lower area of ​​the attachment membrane, 5.3-marine organisms mainly distributed in the areas on both sides of the attachment membrane. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0024] The first embodiment of the present invention relates to a method for preventing and controlling marine organisms and corrosion of an offshore wind turbine foundation, wherein 3 to 30 layers of marine organism attachment films are attached to the outer wall of the offshore wind turbine foundation, and the 3 to 30 layers of marine organism attachment films and the innermost layer of marine organism attachment films and the offshore wind turbine foundation are bonded together with waterproof adhesive.

[0025] The second embodiment of the present invention is substantially equivalent to the first embodiment, mainly in that the marine biofouling film is a waterproof and degradable film.

[0026] Preferably, the marine biofouling film is made of PVA-CBA plastic.

[0027] Furthermore, the marine biofouling film is applied in a staggered manner between every two layers.

[0028] Furthermore, the marine biological attachment film is a dense layer of polygonal small blocks, and the center position of each outer layer of marine biological attachment film small block is directly opposite to the top corner position of the connection seam of the inner layer of marine biological attachment film.

[0029] Preferably, the marine biofouling film is triangular, quadrilateral or hexagonal.

[0030] The third embodiment of the present invention is substantially equivalent to the first embodiment, mainly in that 3 to 30 layers of marine biofouling films are installed before the offshore wind turbine foundation begins to be transported.

[0031] Furthermore, among the 3 to 30 layers of marine biofouling films, the bonding strength of the outermost layer of marine biofouling films is higher than the bonding strength of any other layer of marine biofouling films.

[0032] Therefore, if Figures 1 to 5As shown, taking three layers of marine biological attachment film as an example, the present invention is essentially to stick multiple layers of marine biological attachment film 1 on the underwater structural foundation. When marine organisms 5 are attached to the marine biological attachment film 1, and the weight and volume of the marine organisms increase, the first layer of marine biological attachment film 1.1 will fall off under the action of gravity, buoyancy, and water flow force, and the marine organisms will begin to attach to the second layer of marine biological attachment film 1.2 until the last layer falls off. The number of layers of marine biological attachment film 1 can be designed according to the design service life of the structural foundation and the reproduction capacity of marine organisms in the sea area. At the same time, the marine biological attachment film 1 can isolate the direct contact between the structural foundation and the seawater, and play an anti-corrosion role. Until the last layer of marine biological attachment film falls off, the underwater structural foundation will not contact the seawater, and all corrosion will only occur on the marine biological attachment film 1. Since the time for each layer of the marine biological attachment film to fall off is not very long, the corrosion has little effect on the marine biological attachment film. The specific usage content and construction method are as follows:

[0033] (1) Installation, transportation and use of marine biofilm: The marine biofilm 1 must be made of thin and lightweight materials, and each layer is bonded by waterproof glue 4. The bonding strength can be controlled by the strength of the weight and volume of the marine biofilm under the action of gravity, buoyancy and water flow. When the last layer of marine biofilm is bonded to the underwater structure, the bonding strength must be higher than the bonding strength between each layer of marine biofilm, mainly to prevent premature shedding between the marine biofilm and the underwater structure. The marine biofilm is bonded to the underwater structure components in modules along the length direction, and each module is overlapped in the length direction. This is mainly to prevent the first layer from dragging the latter when it starts to fall off. When the marine biofilm 1.1 starts to fall off, the marine biofilm 1.2 presses the marine biofilm 1.3, and 1.3 will not fall off before 1.2 falls off. For details, see Figure 1 After the marine biofouling membrane is completely bonded on land, it is transported to the sea with the structure for construction. During transportation and installation, attention should be paid to the protection of the marine biofouling membrane 1.

[0034] (2) Principle of shedding of marine biofilm 1: Marine organisms 5 and their secretions are continuously deposited in the marine biofilm 1. The location and shape of the deposits are variable. The factors that affect the shedding of marine biofilm are mainly the gravity, buoyancy and water flow of the marine organisms 5. When the marine organisms are mainly deposited on the upper part of the marine biofilm 1 (the underwater structure is vertically downward), the marine biofilm 1 will begin to fall downward along the upper edge only under the action of the marine organisms' gravity. Figure 3 When the marine organisms 5 are deposited mainly in the lower part of the marine organism adhesion film 1, the marine organism adhesion film 1 begins to gradually lose its adhesive force upward along the lower edge under the buoyancy of the marine organisms and begins to fall off upward. Figure 4When the marine organisms 5 deposit mainly concentrate on the two layers of the marine organism attachment film, only under the action of the water flow force can the marine organism attachment film gradually lose its adhesive force along both sides to the middle and begin to fall off to both sides. Figure 5 When the marine organisms are uniformly deposited on the marine organism attachment film 1, the marine organism attachment film 1 gradually loses its adhesive force along the direction of the greater force under the action of gravity, buoyancy and water flow.

[0035] (3) Anti-corrosion effect of the marine biofilm 1 on underwater structures: Since the marine biofilm 1 is directly bonded to the outer surface of the underwater structure, it directly isolates the outer surface of the underwater structure from contact with seawater, and all corrosion will only occur on the marine biofilm.

Claims

1. A method for preventing marine growth and corrosion of offshore wind turbine foundations, characterized in that: 3 to 30 layers of marine biological attachment films are attached to the outer wall of the offshore wind turbine foundation, and the 3 to 30 layers of marine biological attachment films as well as the innermost layer of marine biological attachment films and the offshore wind turbine foundation are bonded by waterproof adhesive.

2. The method for preventing marine growth and corrosion of offshore wind turbine foundations according to claim 1, characterized in that: The marine biofouling film is a waterproof and degradable film.

3. The method for preventing marine growth and corrosion of offshore wind turbine foundations according to claim 1, characterized in that: The marine biofouling film is applied in a staggered manner between every two layers.

4. The method for preventing marine growth and corrosion of offshore wind turbine foundations according to claim 3, characterized in that: The marine biological attachment film is a dense layer of polygonal small blocks spliced ​​together, and the center position of each outer layer of marine biological attachment film small block is directly opposite to the top corner position of the connection seam of the inner layer of marine biological attachment film.

5. The method for preventing marine growth and corrosion of offshore wind turbine foundations according to claim 4, characterized in that: The marine biological attachment film is in the shape of a triangle, a quadrilateral or a hexagon.

6. The method for preventing marine growth and corrosion of offshore wind turbine foundations according to claim 1, characterized in that: The 3 to 30 layers of marine biofouling films are installed before the offshore wind turbine foundation is transported.

7. The method for preventing marine growth and corrosion of offshore wind turbine foundations according to claim 1, characterized in that: Among the 3 to 30 layers of marine biofouling films, the bonding strength of the outermost layer of marine biofouling films is higher than the bonding strength of any other layers of marine biofouling films.

8. The method for preventing marine growth and corrosion of offshore wind turbine foundations according to claim 2, characterized in that: The marine biological attachment film is made of PVA-CBA plastic.

Images