Liquid Seal at the outlet from condenser to accumulator?
Liquid Seal at the outlet from condenser to accumulator?
(OP)
Hi All, We have a P&ID showing a liquid seal (an inverted U) at the outlet from a Overhead(OH) condenser to the accumulator below. The accumulator is having a split range fuel gas/flare pressure controller. The flow is by gravity from the condenser to the accumulator as there is a pressure equalizing line between the two. Can this seal be for preventing the vapor binding of the condenser? Does the seal require a syphon breaker?





RE: Liquid Seal at the outlet from condenser to accumulator?
Again, Can it be for subcooling the liquid?
RE: Liquid Seal at the outlet from condenser to accumulator?
Harvey
Katmar Software
Engineering & Risk Analysis Software
http://katmarsoftware.com
RE: Liquid Seal at the outlet from condenser to accumulator?
From your description I would think it is for subcooling. But it depends on the loop elevation relative to the condenser.
If the liquid velocity is more than 1 ft/s, vapour cannot flow against the liquid, and the system may siphon and oscillate. Thus, either the last vertical down pipe must be very large, or you need a vent to break the siphon.
Either way, I assume the pipe enter the overhead receiver at the top and there is no submerged internal pipe.
RE: Liquid Seal at the outlet from condenser to accumulator?
Kruger,
the U seal covers the diameter of condender and the liquid inlet to the vessel is slotted at the lower half and submerged upto the bottom.
Thanks
RE: Liquid Seal at the outlet from condenser to accumulator?