Question

The filter press commonly used in oil mill is a:

• A. Continuous type of pressure filter
• B. Continuous type of vacuum filter
• C. Discontinuous type of pressure filter
• D. Discontinuous type of vacuum filter

Hint:

Despite being discontinuous, the filter press is favored in oil mills because it is versatile, handles high solid loads, and produces very dry filter cakes.

Answer 1

The Correct Option is C

A plate and frame filter press used in oil mills works by pumping oil under pressure into a stack of frames, which classifies it as a pressure filter rather than a vacuum filter. Once the frames fill up with solid cake, though, the press has to be stopped, opened, and the cake scraped out by hand before it can run again, which makes its operation batchwise rather than continuous. Combining these two traits, using pressure and running in batches, the filter press is a discontinuous type of pressure filter.