Prediction Of Heavy Metal Transport And Diffusion In Zhuanghe Offshore Wind Power Tower

Wind power generation is a new direction for the development of clean energy.China’s offshore wind energy resources are very rich.The development of offshore wind power development planning is of great significance for conservation and efficient use of energy.The development of offshore wind farms has many advantages,such as small footprint,large power generation,stable operation and zero emission.However,wind farms will also have a certain impact on the marine environment during construction and operation.The sacrificial anode protection method is adopted to avoid the corrosion of the steel structure of the wind turbine foundation by seawater,but the method also lead to the diffusion of heavy metal zinc with the flow,which affects the surrounding water quality and marine ecology.Therefore,it is important to study the transport and diffusion of heavy metal zinc during the operation of offshore wind farms.Taking the Zhuanghe offshore wind farm as an example,this paper first analyzes the tidal field in the sea area before the construction of the wind farm,and verifies that the simulation results are reasonable and credible.Furthermore,12 wind turbine foundations are evenly arranged in the offshore wind power area,and each single pile foundation is generalized into an impervious unit with a length and width of 6 m.In order to avoid the occurrence of grid abrupt phenomenon,a stepwise encrypted grid is adopted.The method divides the grid to study the influence of the wind turbine pile foundation on the tidal current dynamics of the sea after the wind farm construction.Finally,the flow velocity of each fixed point(a total of 16)before and after the project is compared.It can be seen from the results that the offshore wind farm project construction has little effect on the tidal current characteristics of the surrounding sea area.And the average flow velocity variability is basically within 0.10%,the trend of tidal current flow is basically within 0.03°.In order to study the transport and diffusion of heavy metal zinc,based on the hydrodynamic model of 12 wind turbine foundations,a convection diffusion model was added to obtain a contour map of heavy metal zinc concentration.When the horizontal diffusion coefficient is set to 0.2m2/s,the area where the concentration contour exceeds 1.0 mg/L is about 95.00 km2.And when the horizontal diffusion coefficient is 0.02 m2/s,the area where the concentration contour exceeds 1.0 mg/L is about 93.98 km2.Finally,a method for estimating the amount of biological loss is applied.The loss is the product of the resource density of a certain type of organism and the area occupied by the organism.It can quantitatively predict the biological loss caused by the transport and diffusion of heavy metal zinc to the Zhuanghe waters.the amount.This paper explores the impact of heavy metal zinc released during the operation of wind turbines on the marine environment,and predicts the amount of biological loss caused by the transport and diffusion of heavy metal zinc,which will provide certain reference value for the prevention and treatment of marine pollution caused by heavy metals and other pollutants.