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Rotary vacuum filter drum processes start with a pre-coat usually consisting of diatomaceous earth (DE) or other types of filter aid. After pre-coat has been applied, a broth is sent to the bed of the drum. The drum skims the surface of the broth as vacuum picks up waste and allows for filtrate to be sucked through a vacuum receiver. The filtrate is pumped to the next step of the process and the waste, or cake is cut/scraped off the drum and sent to a trailer or bin. |
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Rotary Vacuum Drum Filter (RVDF) is one of the most prevalent practices in the industry to dewater all kinds of sludge at the least capital cost. Even though these units consume higher power due to deployment of Vacuum Pump, these units are still preferred in given situations in view of their low cost maintenance in case of any machine problems. These units can be supplied in various sizes upto 1000 sq.ft. filtration area each unit. Depending upon the type of sludge, the dewatered solid discharge mechanism can be in different configurations e.g. Belt Discharge, Knife Discharge, String Discharge etc. These units can also be provided in carbon steel and stainless steel construction to meet specific application requirement. The RVDF is supplied complete with filtrate receiver, moisture trap and other accessories like Pumps, Vacuum Pumps, Blowers etc.
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