Dual Flow Traveling Band Screen
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.
External to Internal Dual-Flow
Dual-flow traveling band screens have become the most popular type of band screen because of the many advantages they offer. These traveling screens are installed with the screening surface parallel to the water flow causing the water to flow into the screen from the sides rather than head-on. This installation method effectively eliminates the chance of debris carry over and provides a greater screening surface area, making the dual-flow design the most effective style of traveling band screen available. The dual-flow design is ideal for screening high volumes of water with a lot of debris. Beaudrey dual-flow traveling band screens can be retrofitted into existing thru-flow traveling band screen openings. This allows plants to increase their efficiency while decreasing the bottom line since they do not have to invest in costly modifications of the existing civil structures nor do they have to re-design the existing intake layout.
Internal to External Dual-Flow (Center-Flow)
Center-flow traveling band screens have the same advantages and characteristics as dual-flow band screens. Their general design and structure are the same and they are installed with the screening surface parallel to the water flow, just as dual-flow band screens. The difference with center-flow band screens is that the water flow is reversed; rather than flowing into the screen from the sides and out through the center, the water flows into the center of the screen and is discharged from the sides. Although this is less common, Beaudrey can apply this design to their traveling band screens.
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 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 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
Value Creating Advantages
Protects downstream components in the water intake system
Retrofitting is an economical alternative to replacing entire intake screening systems. Beaudrey traveling band screens are designed to retrofit any existing intake system
Provides a large screening area in a compact design
Designed so that Beaudrey Scoop-a-Fish™ protection system can be installed on the screen
High quality construction and seals prevent any grease from leaking into the water source
Custom engineering minimizes the capital expenditure of the intake system
Framed design reduces civil work and installation costs for retrofits and new screens
Dual-flow traveling band screens have zero carryover and 100% screening efficiency
With rotation speeds of up to 20 m/min, the Beaudrey traveling band screen has high speed debris removal