Traveling band screens are typically installed in an intake screening system downstream from the trash rakes or coarse bar screens and upstream of the circulating water pump. Their main function is to remove debris (from 1 mm-10 mm) before the circulating water is distributed to sensitive plant components.
When water flows through the panels of the traveling water screen, debris is collected on the NoCling™ mesh panels. As the screen rotates, the debris is carried up to deck level where a pressure spray flushes it from the panels into a debris trough. The clean panels then rotate back into the water, resulting in continuous, uninterrupted screening. Traveling band screens are generally installed with one of three possible flow patterns: external to internal dual-flow, internal to external dual-flow (center-flow), or thru-flow.
Thru-flow traveling band screens are installed so that the screening mesh is perpendicular to the water flow. With this design, water flows through the upstream side of the screen and then crosses through the downstream side. Although this method allows for a simpler civil structure compared to dual-flow traveling screens, it presents the potential for debris carryover. Also, the thru-flow design only employs 50% of the screening surface at all times.
Beaudrey Traveling Band Screens
With nearly 100 years of experience in engineering, designing and manufacturing water intake screens and patenting their first traveling band screen in 1922, Beaudrey has built and exceptional reputation world-wide as being experts on traveling band screens. Beaudrey traveling band screens are custom engineered for every unique application and can incorporate various features to suit site conditions and the operational needs of our clients. Beaudrey traveling screens are used in cooling water intake systems, irrigation systems and the pre-treatment of drinking water or urban wastewater. They can be installed in various water conditions including salt water, fresh water and brackish water.
Depending on the specific application, Beaudrey traveling band screens can be installed with mesh sizes ranging from 0.5 x 0.5 mm to 10 x 10 mm. Larger mesh is best suited for removal of large floating debris such as sticks, trash and plastic while fine mesh (Fish Protection Systems, which have been proven to reduce the harmful effects of intake screens on marine life.
Beaudrey traveling band screens are manufactured in the highest quality carbon and stainless steel available and they are designed for easy maintenance; they include features such as self-cleaning spray nozzles and simple chain tension adjustment. OEM spare parts are also available for routine maintenance needs.
Learn more about Beaudrey Fish Protection Systems