How Does a Dewatering Screen Work?
The dewatering screen design is relatively simple. The majority of dewatering screen systems utilize two counter-rotating vibrating motors, while some utilize twin eccentric shafts. At the same time, other types of dewatering screens employ multiple mechanical exciters on larger machines that are mounted on a stressed relieved bridge. The drive component is typically set up with an inclined deck that may be set anywhere from three to five degrees. Here’s how dewatering screens work to reduce the water content of slurries:
The slurry of water and solids is sent down a declined, steeply screened surface to achieve rapid drainage.
When the slurry passes over the screens, water is drained from the mixture and creates a pool in the valley.
As the slurry moves through the system, it is taken back up an incline. The screens continuously vibrate throughout the process to help additional water separate from the solution.
An uphill slope of the screen surface can be combined with a discharge weir to create a deep bed that functions as a filter medium. This allows for even finer solids to be screened out.
If you would like an even more refined, cleaner product, you can use a rinsing station along the pathway. The sand dewatering equipment can remove the water used for rinsing just as it separates the water from the slurry.