Low liquid level in Compressor Suction scubber
Low liquid level in Compressor Suction scubber
(OP)
Folks;
in the design of a plant, the compressor in equipped with suction scubber,at LL liquid level the ESD will close, however there is no liquid in the suction in normal operation.
how to fix this?
thx
in the design of a plant, the compressor in equipped with suction scubber,at LL liquid level the ESD will close, however there is no liquid in the suction in normal operation.
how to fix this?
thx
RE: Low liquid level in Compressor Suction scubber
RE: Low liquid level in Compressor Suction scubber
See why the vendor or the design needs a liquid level first.
Many scrubbers are installed because whilst the risk of wet gas is low or v low, the consequences for the compressor are very big if you get liquid into them. The scrubber doesn't usually cost very much so people stick one in "just in case".
So you need to look at the consequences / issues of operating below LL and if there are no big risks or issues then modify the system accordingly not to be an ESD trip (I assume it is locked out if you operate at no level).
The issue might be accidental gas blow by on the drain valve?
I've seen some scrubbers on transmission lines have the automatic / controlled level system removed and made manual on the basis that any liquid is caught by the first compressor down the line so subsequent ones just "never" see any liquid. Any liquid in there that is not replaced will almost certainly evaporate over time so not surer a static head of liquid works either.
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RE: Low liquid level in Compressor Suction scubber
the plant is optimally manned, no manual operation forseen as long as we need operator on place just in case
I am thinking about override the ESDVs for this particular case and monitor the presence of liquids very closely and consider the gas blow by scenario during hazop of downstream ubits
RE: Low liquid level in Compressor Suction scubber
No details = no valuable answers
RE: Low liquid level in Compressor Suction scubber
Should really be done under a MOC procedure.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Low liquid level in Compressor Suction scubber
Best regards, Morten
--- Best regards, Morten Andersen
RE: Low liquid level in Compressor Suction scubber
RE: Low liquid level in Compressor Suction scubber
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.