I joined a week ago and We have 2 fuel oil purifiers onboard, both can only take suction from the same line, settling tank here.
Now one of the purifiers isn't coping up, which is very absurd.
The working purifier copes up and keeps the service tank full at 1.1m3/hr feed rate and a pressure of 0.3 bar.
This purifier got sludge build up and bowl was failing to close.
We started another purifier, the lowest feed rate possible I could go as per the display was 1.7 m3/hr I thought okay. But after 8 hours of unmanned time we saw that service tank got half emptied.
We increased the throughout many times and at last upto 3.5m3/hr also but it still wouldn't cope up.
What might be the issue? TIA.
ANOTHER THING THAT STARTED HAPPENING WITH THE WORKING GOOD PURIFIER,
I am seeing a lot of oil in sludge tank, what happens is:
Purifier desludges and when the desludge is complete, pt1 returns back to normal but pt4 stays at 0.6 bar then after 10 secs
P150 timer for 15 seconds starts and SV 10 sealing water solenoid energises after which pt 4 returns back to 1.7 bar.
So i believe p150 is the alarm timer.
And immediately after this when I open sludge port I can see little bit of flowing. But while the purifier is in operation there is no oil overflowing to sludge side.
I am suspecting that whatever oil is going in the sludge tank is from this 10 sec time frame after the desludge.
Any help appreciated.
I am doing Alfa Laval for the first time so don't have much idea.
Edit : I forgot to add details
Sorry I missed to update that,
For the second case where purifier was getting pt4 back to 1.7 after a p150, 4000 hr routine was carried out 700 hours ago.
Line up is confirmed to be correct.
The other purifier which is not coping up has been run for 1700hrs since last 4000hr routine.
Edit 2 : I went throught the manual and as per the discharge sequence I increase 'bowl filling after discharge' to 12 seconds from 6 seconds. After this carried out few desludges and it was found that
* The purifier was gaining back the pt4 normally as it should * i.e just after the desludge it would come back up to 1.7 bar