Example 6.1 Horizontal diaphragm filter press

It is proposed to deUver the feed to the press via a centrifugal pump whose characteristics are shown in Table 6.3. Filtration with the pump is to be stopped when the cake thickness on each filtering surface reaches 20 mm (i.e. 40 mm total cake thickness per chamber = 50% of the 80 mm chamber thickness see Table 6.4). The unfiltered suspension remaining between the two cakes in each chamber is filtered with the diaphragms at the specified constant pressure of 600 kPa. 

The feed suspension characteristics have been measured experimentally and these are shown in Table 6.4 along with suggested operational parameters. Determine the solid, liquid and solute throughput rates, the filter cycle time and other performance indicators. 

The calculations follow the procedures outlined in Section 6.2 and conveniently divide into five parts such that = (tf)i + t 2 + + U- 

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