Characterization of hydrodynamics and electrochemical treatment of dye wastewater in two types of tubular electrochemical reactors

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Guo, Xiaotao^1 ; You, Shijie^1

State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin

150090, China^1

关键词: Computational fluid dynamics methods;    Electrochemical reactor;    Electrochemical treatments;    Electrode surfaces;    Industrial wastewaters;    Treatment efficiency;    Turbulence promoters;    Turbulent intensities;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012008/pdf
DOI  :  10.1088/1755-1315/81/1/012008

来源: IOP

【 摘 要 】

Electrochemical treatment is an environmentally friendly method of removing pollutants from industrial wastewater, and tubular electrochemical reactor is one kind of electrochemical reactor. However, the flow field on the electrode surface in a traditional concentric tubular reactor is not homogeneous, leading to low treatment efficiency of the reactors. Therefore, a new tubular electrochemical reactor based on spiral flow caused by a turbulence promoter is presented. In this work, fluid flow and hydrodynamics of the new tubular electrochemical reactor using computational fluid dynamics (CFD) method are studied by comparing them to the traditional one. The electro-oxidation of methylene blue simulation wastewater treatment was developed to analyze the processing efficiency of the two types of electrochemical reactors. In the new tubular electrochemical reactor, due to the presence of spiral turbulence promoter, the mean flow rate and turbulent intensity were clearly increased by 500-700% and nearly 200% compared to that of the traditional one, respectively. Under the same inlet-velocity, the removal rates of wastewater in the new tubular electrochemical reactor were also improved.