Ring Diffuser to Dispense Antifoulants at Seawater Intakes

摘要

Traditional applications of chemicals to flows in water and wastewater plants are aimed at the flow itself, across its full cross section. However, at seawater intakes the need is to apply antifoulant chemicals not to the whole flow, but just around the inside wall of the intake pipe, as close to its entrance as possible. This desktop study combines the distribution hydraulics of multiport diffusers with an established design for a streamlined pipe entrance. The resulting design is of a ring diffuser incorporated within a streamlined entrance to a seawater intake pipe to provide uniform and well-positioned dosage of an antifoulant chemical stream all around the interior wall of the pipe, for effective and economical dosant application. Streamlining also minimizes head loss at the intake. (C) 2017 American Society of Civil Engineers.