Abstract
As the flow rate through an AguaClara plant is increased, the plants design will need to be altered. More specifically, to achieve the required amount of energy dissipation for adequate alum mixing, we would need to redesign the entire entrance tank.
Gracias Entrance Tank Design
Design Schematic
Rapid Mix Chamber
*Note: Dimensions are in cm.
The AutoCAD file for this preliminary design is attached to this page.
The rapid mix chamber is made of concrete and is attached to one side of the entrance tank. The water within the entrance tank initially enters the horizontal channel through a rectangular orifice. This rectangular orifice will help provide the necessary energy dissipation to create the large eddies that are necessary for global mixing. The water that enters this rectangular orifice will experience free fall into the horizontal channel. Then, another waterfall occurs when the water flows from the horizontal channel into the vertical channel. The water that flows into the vertical channel will be in free fall. The water will experience will experience a contraction at the rectangular orifice that leads into the flocculation tank. This will allow for the necessary energy dissipation to achieve the molecular diffusion of the alum.
Design Assumptions
The majority of the assumptions made for this design were the same as in past designs.
Design Specifications
The design of the orifice that leads into the flocculator must provide the necessary energy dissipation