As the demand for fresh water continues to rise globally, seawater desalination has become an increasingly important solution, particularly in regions with limited access to freshwater sources. At the heart of this process lies a critical but often overlooked component: the intake screen. Designed to protect downstream equipment and marine life, intake screens are the first line of defense in any seawater desalination system.
Among the most effective technologies in this category is the Coanda screen, a specially engineered wedge wire screen that combines passive operation with high-efficiency filtration. These screens play a vital role in ensuring the longevity, performance, and environmental compliance of desalination plants.
An intake screen is a physical barrier installed at the water source, such as a coastal inlet, to filter out debris, sediment, aquatic organisms, and other unwanted materials before the water enters the desalination facility. These screens are typically made from durable stainless steel materials designed to withstand harsh marine environments and high flow volumes.
Coanda screens are a type of static wedge wire screen positioned at an angle to take advantage of the Coanda effect, a fluid dynamics principle where water adheres to a curved surface. As seawater flows over the curved screen face, fine slots filter out particles and organisms while allowing clean water to pass through.
Efficient pre-filtration extends the life of desalination systems and reduces operational costs. Membrane fouling, pump damage, and frequent maintenance are all minimized when high-quality intake screens are in place.
Investing in a robust intake system, particularly one incorporating Coanda screens, ensures consistent water quality, minimizes ecological disruption, and supports long-term operational efficiency.
