8/11/2019 CA-310 & EC-310 Operating problem + Inspection
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CA-310 / EC-310 Operating problem
The stabilization column CA-310 and its reboiler EC-310 failed
to achieve the export oil specification (R!and "#$ content% at
&0'000 )!* +hereas the, have been desined to process .0'000
)!*/
se attached setch for better understandin of the installation of
CA-310 and EC-310 elevations and findins(elevations are as per site
measurement%/
A. CA-310/EC-310 Operating Findings
"ere belo+ are the main operatin problems findins2
hen the flo+ increase to &0'000 )!* throuh the stabilization
column' it is not possible to achieve
the ood temperature profile inside the column b, lac of strippin
as/
hen the reboiler is in operation' ie steam is ettin condensed in
the tubes' it is not possible to et
the proper level in the shell of EC-3102 maximum level obtained
is &04 of the shell/ ut +hen thereboiler is off (steam inlet
closed% and the oil is in circulation in the column' the level is
obtained up tothe +eir in the shell of EC-310/
To confirm the reboiler +eir heiht and condition the valve on
the oil outlet from the +eir chamber (#'
see setch% has been closed durin fe+ hours/ The oil level in the
shell has not increased and nomalfunction of the export pumps +as
noticed durin this test/
*urin normal operation the sin temperature of the #05 pipe from
CA-310 to EC-310 is not
homoeneous2 at 1#h 60C' at 3h 78C and at 6h ..C/ This indicates
lo+ flo+ throuh the pipe/
All above seems to indicate lo+ oil flo+ from CA-310 to EC-310/
9nspection of CA-310' EC-310 and #05 pipeinternal +as decided to
investiate the reason of this lo+ flo+ throuh normal desin oil
route/ )il from tra, #8is b,passin EC-310 b, flo+in throuh chimne,
to bottom part of column and then export pump/ elo+pictures sho+
oil traces in chimne, and vortex trace on column shell2
ortex trace on column shell near chimne, )il traces inside
chimne,/
8/11/2019 CA-310 & EC-310 Operating problem + Inspection
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B. CA-310/EC-310 Inspection, mid-Janar! "00#.
)n the 10 :anuar, #007 CA-310 and EC-310 +ere shutdo+ns as part
of the $*3 of the ;e+ !lant of *orood3 !ro8 mm' +hereas bottom is
&88 mm (see setch for details%/This is blocinthe bottom =uarter
of the vortex breaer/
roen clamp bar of seal pan Too lon vortex breaer at ;3
". EC-310$The reboiler shell and bundle +ere found clean/There
is no defect to report on this vessel' bundle lea test at 18/6 bar
+as passed/The tubes of the bundle are ver, close to the oil
inlets' as sho+n in belo+ picture b, the steel +ire
representin the shape of the bundle/ The bundle rail in EC-310
is oil seal on the +hole lenth of the shell/
$teal +ire at bundle shape undle rail in EC-310
3. "0-%&-310-00'-B'"3&The #05 pipe bet+een CA-310 and
EC-310 has been inspected b, boroscope2 it +as free of an,
debris/
