IJIFR VOLUME 3 ISSUE 12 AUGUST 2016

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ISSN: 2347-1697 International Journal of Informative & Futuristic Research (IJIFR) Volume - 3, Issue -12, August 2016 Continuous 36 th Edition, Page No: 4626-4649 materials. The assemble model is shown in the Fig.11. Before a final design of the water filter was created, it was necessary to ensure that the filter works as described. Several filters models were made to determine the filter effectiveness and flow rate using different concepts and flow paths. The first step in designing the filter is to determine the seating space provided for the equipment in most of the locations. The targeted locations allowed a maximum lateral space of 1000mm and longitudinal space of 2000mm. Since the pipe fitting for water inlet and outlet with flush system and oil elements discharge is to be spaced with in the allowed volume of seating chamber, the filter body has to be slender but sizeable enough for the process to occur inside. The second step of the design is to evaluate the pipe diameter to facilitate the flow rate of inflow as well as the out flow of the filtered water without building up the pressure even during the peak loads that can exceed the allowable pressure capacity of the pipe as well as the body material. The calculation of the pipe diameter with respect to rate of discharge fairly allows the designer to even determine the material of the pipe that is to be selected and the space requirements of the pipe as well. The next tread level in designing the filter is the most important aspect of the entire process, i.e., establishing the flow path of the storm water with in the space of the filter. This step is done in two parts. In the first, the behavior of the suspended and quick settling particles is scrutinized when subjected to hydrodynamic forces in vortex direction. The particles behavior is studied with iterations in speeds and flow rate values of water vortices in a transparent container. This study is utilized for determining the dimension of the space required for hydrodynamic flow in the filter body and that of the hole that is to be provided for silt trap funnel. In the second part the loading factor for filter media is evaluated with varying amounts of suspended particles. This is to decide on the surface area of the filter media to be provided to meet the targeted value of filtration without resuspending the particles during high loads. A cumulative decision is made after studying both parts of the third step of designing. This results in precise dimensions that are to be provided to the body and the filter chamber where the filter media is located. It also gives a solution to the flow path of the water, where the hydrodynamic vortex flow occurs exterior to the filter chamber and the later the water enters the filter chamber from bottom; also called up-flow.For the water to flow in a vortex direction smoothly even during lowest flow rates, fin like protrusions spiraling towards the bottom is provided inside the hydrodynamic flow space. Each of the spiraling fins is designed with precise horizontal orientation in the top end (starting edge) to gradual inclination towards upside at the bottom edge. These fins not only direct the water to the bottom portion of the filter but the gradual inclination in them foster the oil/grease elements to surface. They act as parallel plate coalesce typically used in oil water separators of conventional models. The filter chamber is designed in a fashion with a smaller entry area than the lateral area of the chamber to provide a smaller entry point for the water and prevent the heavier sediment particles to enter in it. This also provides larger volume for the vortex base of the hydrodynamic flow which enhances the trapping capacity of the sediment particles. S.V.Tarun, G.M.Swamy :: Design And Development Of Hydrodynamic Vortex (Up-Flow) Pretank Rainwater Filter 4639
ISSN: 2347-1697 International Journal of Informative & Futuristic Research (IJIFR) Volume - 3, Issue -12, August 2016 Continuous 36 th Edition, Page No: 4626-4649 Figure 11: Isometric Sectional view of Filter assembly (without filter composite media) The oil outlet pipe is designed to be assembled in the top section of the unit because it being lighter rises to the water surface. The water pressure below the oil layer pushes it to the top which in turn discharges it. To enhance the collection of and easily flow of oil/grease the top cover plate is taper toward upside. Figure 12: Sectional view of Filter assembly (with filter composite media in filter chamber) The final step of the design process it to provide the unit with suitable sludge flush system which can be easily operated and effective. This also should provide enough space to clean and wash through the silt trap for stubborn patches of sediment which form lumps during long periods of inactivity. S.V.Tarun, G.M.Swamy :: Design And Development Of Hydrodynamic Vortex (Up-Flow) Pretank Rainwater Filter 4640
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IJIFR VOLUME 3 ISSUE 12 AUGUST 2016

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