OPERATING INSTRUCTIONS
4-4 15 Jun 12
HyperPoolShaker
“Roping”
“Roping” is a term applied to a solid discharge stream (Figure 4-2) flowing from the
hydrocyclones. This undesirable discharge pattern results from overloading the apex opening with
solids, thereby preventing air from entering the cone. Due to the apex blockage, feed material
entering the cone can no longer move downward and, therefore, flows directly out the upper
discharge at the top of the cone. In this abnormal operating mode, flow from the upper discharge
contains large particles that would normally flow out the lower discharge at the bottom of the
cone. If permitted to continue for a lengthy period of time, the blockage becomes difficult to clear
and the risk of internal damage to the cone increases.
“Roping” discharge results in reduced solids removal capability, increased probability of wear to
hydrocyclone components, and potential damage to the feed pump.
Figure 4-2. Abnormal Hydrocyclone Operation - “Roping” Discharge
Spray Patterns
The spray pattern varies in response to the feed head (inlet pressure), feed rate, and
hydrocyclone apex opening. To maximize overall efficiency, the spray pattern of each cone must
be balanced for optimal performance. This is done by observing the lower discharge pattern and
then adjusting the apex opening to achieve the correct discharge angle (Figure 4-3) for the
prevailing feed rate and inlet pressure.
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