Traveling water screens are one of the most cost-effective means for fine screening of raw water. They are used in all types of applications where continuous raw water intake screening is required and protection of downstream equipment is critical.
Debris in the flow can overwhelm and damage rotating screens or cause serious condenser issues. Leaves, trash, marine organisms, and aquatic vegetation can blind various systems. Review of the source water is critical to the proper selection of the flow pattern, screen panel (basket or tray) design, mesh apertures, rotation speeds, and materials of construction.
WTR traveling water screens are designed to automatically and reliably filter incoming water and discharge recovered debris or marine life into the appropriate handling trough. Screens can be designed to handle typical water-borne debris as well as unusual grasses, seaweed, jellyfish and many different types of debris.The screens are available in various flow patterns including dual flow (DF), dual flow conversion (DFC), and thru flow (TF), also known as single flow.
The dual flow pattern is recommended to eliminate debris carry-over. Filtration is through two faces simultaneously, with total separation of influent from effluent. Screens can be provided as a dual flow for new civil works or as a dual flow conversion to convert existing thru flow sites to a dual flow pattern, typically with no civil modifications. Duty types include standard debris handling, jellyfish handling, or fish screens.
All flow patterns are available as fish recovery and return to meet the EPA’s 316(b) environmental requirements. Specialized water tight, hydraulically stabilized fish recovery buckets allow for the quick recovery of juvenile marine life. Organisms are elevated to the head section where gentle sluice sprays aid in discharging them into a return trough for reinsertion to their indigenous environment. After the fish sprays, the screen continues rotation past higher pressure debris sprays, washing the captured screenings into a separate debris trough for discharge or further disposal.
WTR Engineering, LLC, is a wholly owned subsidiary of WesTech Engineering, as of April 1, 2017. WTR designs and supplies mechanical water filtration equipment, such as raw water and wastewater screening for large flows, for both the municipal and industrial markets, including the power industry.