I work in gas plant. Newly, we faced with serious problem.
We have two amine pumps. amine circulation is 145m3/h. according design when amine flow reached to 120 m3/h(any reason),due to be active a Alarm, this Alarm to start the stand-by pump. Sufficient time to this work is 10sec.if in this time flow reach to 109.5m3/h, another Alarm to be active and after 30 second if reach flow to above 109.5 ,that due to be unit shutdown.
Now,we would like to change second time to above 30.i don’t know how we must investigate the feasibility it?
Meanwhile, in a same plant, Empirically, Time will reached to 90sec.but No reasonable calculations.