|Steadfast Equipment||Disposable Rotary Drum Filter||Nominationed for the 2002 Filtration+Separation Product Achievement Awards|
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Filtration Area/Capacity Range
Materials of Construction
Full Filter Systems
Filter Media Options
Continuous Precipitation/ Crystallization
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Protected under US patent 6,336,561
The Operational Flow sheet shows how the Disposable Rotary Drum Filter fits into a typical solids-liquid separation process. Before operation is started four connections are made to the Disposable Rotary Drum Filter; one feed from the Slurry Tank, one return to the Slurry Tank, one to the Filtrate Receiver, and one to the Cake Collection container. If cleaner operation is desired then an air filter can be attached to the vent connection. If inert gas or nitrogen is required to contact the filtered material, then a supply of this gas can be attached to the vent connection.
After the connections are made, the device operates as a "closed" system. To start processing the filter is rotated and feed from the Slurry Tank is pumped into the bottom of the filter housing using a peristaltic pump. An overflow off the back of the housing controls the level in the filter by returning a small amount of feed to the Slurry Tank.
As the filter operates, filtrate from the inside of the drum is directed to Filtrate Receivers, while cake discharged from the cake removal knife falls into the Cake Collection Container. Of course, vacuum is pulled on the Filtrate Receivers and thus on the filter drum itself from a Vacuum Source.
As an alternative to the use of one filtrate receiver that is continually pumped out, the filter system can be operated with two filtrate receivers that are periodically switched on-line and then manually emptied, as shown here.