Classification of filters
. After the filtrate is sucked out, the filter is drawn out by the catheter, and the filter residue accumulated on the surface of the filter leaf is removed after stopping. The continuous operation of the vacuum filter is suitable for thick suspension filter containing solid particles more. Rotary drum vacuum filter, internal filter drum, vacuum filter, disc vacuum filter and tipping bucket vacuum filter are similar in principle.
This filter is divided into intermittent operation and continuous operation of two kinds. A batch operated vacuum filter filters various concentrations of suspension. The vacuum filter is filled with suspension in the container shell. The filter leaves with filter cloth on both sides are immersed in the suspension, and the inner cavity of the filter leaf is communicated with the vacuum system
Negative pressure is formed at the outlet of the filtrate as a driving force of filtration. The absolute pressure of the operation vacuum of the industrial vacuum filter is (2.5 ~ 8) * 105 PA. When filtering, the temperature of the suspension should be lower than the evaporating temperature of the filtrate under the operating vacuum.
With the help of suspension and gravity difference formed in the filter medium pressure as the impetus, generally for intermittent operation, such as sand.
The filter is divided into three types: gravity filter, vacuum filter and pressure filter according to different ways to obtain the driving force.
