Amiad Water Systems | 2019
TEQUATIC™ PLUS F-150 Filter, C-series Skid
30
Operation
4.4.4 Concentrate Purge
The concentrate purge function drains the concentrated solids that tend to accumulate in the lower
portion of the filter housing. The two parameters of the concentrate purge are the frequency and
duration. Generally, the duration should be long enough to exchange the volume of the lower filter
housing with incoming water, but not so long that incoming feedwater is flushed to the drain. The
shorter the purge duration, the more concentrated the discharge will be, but if too short, too much
concentrate my build up in the system.
The frequency of the purge depends on the degree
of solids removal from the feedwater. The more
concentrated the feedwater, the more frequent a purge
should occur. However, too frequent of a purge rate will
reduce the recovery rate with non-concentrated water
being discharged. When the purge schedule is disabled
the valve can be set to open or closed during run.
The purge events should be set in the medium 5 to 20
minute interval. If the DP rises between purge events and
is not fully recovered due to an event, the frequency should be decreased and the duration should be
increased.
4.4.5 Cleaning Cycle Settings
A cleaning cycle is when the filtrate flow is stopped but the brushes continue to rotate against the
filter medium. This permits the brushes to more effectively remove particulate from the face of the
filter without the pressure differential pushing the particles against the filter. After the opportunity
is given to better remove particles they are flushed from the housing using a purge event. Cleaning
cycles occur on a timed basis and/or also when the differential pressure exceeds a setpoint.
The settings related to the cleaning cycles are the schedule for timed events, the duration of the event,
and the differential pressure setpoint.
the frequency of the timed cleaning cycle in minutes
(or to disable the timed cleaning cycle) in the Filtrate
Valve tab. The frequency of cleaning cycles should be
shorter for higher solids water. Too short of a frequency,
however, can reduce total throughput, as there is no
filtrate flow during a cleaning cycle. (A setting of 60
minutes is a good starting point.)
The duration should be long enough to clean the filter, but not so long that the system remains idle
after the filter has been cleaned. The more frequent a cleaning cycle occurs, the shorter each cycle
may need to last in order to be effective. One possible indication that the duration is set too short is
when DP-triggered cleaning cycles occur more frequently than expected. Note that a duration setting
of 45-60 seconds is a good starting range.
set the threshold for a DP-triggered cleaning cycle. The
“High DP” setting determines the differential pressure
value at which a cleaning cycle will be triggered. This
can be used in one of two ways: It can be considered as a
backup to scheduled cleaning, just in case the filter got
