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2.4 Stripping with eductor
2.4
Stripping with eductor
Stripping can be performed to achieve total emptying of the ballast tanks via a stripping eductor.
To use PureBallast during a stripping process an eductor must be installed before the PureBallast
system.
The water used in the stripping process, must be filtered from particles larger than approximately 5
mm. The water passes through the PureBallast system as a regular deballasting process (with
the filter by-passed). The water is finally pumped into the sea.
Note the following:
•
The eductor is not part of Alfa Laval's scope of supply.
•
Procedures to dispose of sediments from the sieve must be included in the vessel's ballast
water management plan.
16
2 Process overview
Book No.9010183 02, rev. 2
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Questions and answers
Good day, When we are operating the pure ballast (Ballasting operation) there was an alarm that's we cant understand where the problem is. The alarm was filter differential was too high. Almost 3-4 bars difference. We had already cleaned the filter and returned it but the alarm is still appearing. We tested all the pressure transmitter and they are all in good working condition. when we open the pressure test **** for outlet filter there was vacuum on it and it was drawing in air which we cant understand. Maybe you have an idea because we already check all the valves and dont know where to look for. Thanks and best regards. Allan Roguel, ETO MV Oshimana
A high filter differential alarm in the Alfa Laval PureBallast 3.0 Flow 1000 during ballasting operations, despite cleaning the filter and checking the pressure transmitters, could be caused by insufficient inlet pressure to the filter. The system requires at least 1.0 bar at the filter inlet to ensure proper backflush flow. If this pressure is not met, the differential pressure may remain high even after cleaning, triggering the alarm.
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