Rotary drum vacuum filter consists of a drum rotating in a tank of slurry to be filtered.
The technique is well suited to liquid with a high solid content, which could clog other forms of filters. The drum can be pre-coated with a filter media (diatomaceous earth, starch, etc.), After the pre-coating is applied, the liquid to be filtered is sent to the tank below the drum. The drum rotates through the liquid and the vacuum sucks liquid and solids onto the drum pre-coated surface, the liquid portion is "sucked" by the vacuum through the filter media to the internal portion of the drum, and the filtrate pumped away. The solids adhering to the outside of the drum, which then passes a scrapper, coming off the drum and a small portion of the filter media to reveal a fresh media surface that will enter the liquid as the drum rotates.

Types of Vacuum Drum Filter

1. Scrapper Cake Discharge	2. Belt Cake Discharge	3. Pre-coated Type

1. Scrapper cake discharge: suitable for filtering materials that are not easy to clog the filter cloth and are easy to remove from the filter cloth

2. Belt cake discharge: suitable for situations where the filter cake has a certain stickiness, cake unloading is not easy, and the filter cloth is often clogged.

3.Pre-coated type: suitable for separations of slurry with low concentration, or solid particles are very fine, high viscosity, high tendency of blocking filter cloth or circumstances that require extremely high filtration precision.

Typical System Flowchart:

Typical Technical Data: