Dewatering
Learn how a filtration cycle works
1.Filtration
2. Optional cake wash
3. De-watering & drying
4. Cake discharge
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go module filter there are four main steps in the filtration cycle these are filtration optional cake wash dewatering and drying cake discharge the filtration cycle begins by lowering the upper plate onto the filter belt and forming the filtration chamber after the filter plates are closed the slurry supply valve opens and the slurry shown here in white is pumped into the filtration chamber as the slurry is pumped into the filtration chamber the filtered solids accumulate uniformly across the filter belt clean filtrate shown here in blue passes through the filter belt into the lower plate and is discharged from the filter outlet at the completion of slurry fill the slurry supply valve closes if washing of the filtered solids is desired and optional cake wash is available the cake wash valve opens and cake wash shown here in blue is pumped into the filtration chamber to wash the filtered solids at the completion of cake wash the cake wash valve closes once the slurry fill or optional cake wash is complete the blowdown valve opens and compressed air or gas shown here in green is introduced into the filtration chamber the compressed air or gas forces liquid from the filtered solids and dries the filter cake at the completion of the blowdown the blowdown valve closes after the blowdown step is complete and a dry filter cake is formed the filter plates open and the dry filter cake is automatically discharged high-pressure spray nozzles wash and clean the filter belt as the filter cake is discharged the next filtration cycle begins automatically with the filter plates closing now that we have watched the operation of the single module filter let's look at how a multi module filter operates the same filtration cycle steps used for the single module filter also apply to the multi module filters filter plates close to form multiple filtration chambers slurry is then pumped into the chambers an optional cake Steff may then be introduced compressed air or gas is introduced for dewatering and drying finally the filter plates open and the cake is discharged as the filter belts advance