Sizing and Structural Analysis of Mechanical Bar Screen

Abstract

With the increase in the world population and improvement in industrial innovations, amount of municipal and industrial wastewater has increased dramatically. Therefore, municipal wastewater treatment systems have become a vital factor in sustaining water sources and decreasing the wastewater discharge to the environment. The first step in preliminary treatment of the wastewater is generally implemented using screening the large solid contamination. Bar screens are particularly an optimal solution for screening the wastewater in pumping stations, municipal and industrial wastewater treatment plants, and also at the inlet of the power plants. In this study, analytical method is used to determine the relationship between the screen size and the slope of streaming water channel. This correlation is now being used during the design of mechanical bar screens at our facility. In this study, Finite Element Analysis is also used to verify the structural strength of the inclined bar screen systems which have been designed, manufactured, and operated by our team. To investigate structural durability of the frames of the mechanical bar screen, static analysis is first checked by Autodesk Inventor Frame Analysis module, then Autodesk Inventor Nastran is used for detailed Finite Element Analysis.

Keywords

• Wastewater
• Bar screen
• Analytical method
• Structural analysis
• Finite element analysis

References

1. Ali, H., Kim, K. W., Bang, S. G., Chae, H. B., Shin, S. W., & Park, C. W. (2019). Numerical modeling of fluid–structure interaction between sewage water flow and bar screen to improve the screening process. Water and Environment Journal, 33(4), 560-573.
2. Briggs, T., Ross, D., & Welp, J. (2005). Size matters: An overview of screening processes. WEFTEC 2005, 4339-4349.
3. Metcalf & Eddy. (1991). Wastewater engineering: treatment disposal reuse (3. Edition). McGraw.