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(Sulphur Recovery Units (SRU
èH2S : toxic impurity
Ø H2S or SO2 rejection to atmosphere is subject to stringent regulations
èObjective : process the acid gas produced in the amine units to convert H2S and other sulphur compounds into elemental sulphur
SRU Feedstocks main characteristics
nNATURAL GAS TREATMENT
lLarge SRU capacity
lSulphur production as high as several thousands tons/day
lExamples : Qatar North Field : 200 t/d S
Astrakhan : 4 * 2100 t/d S
OGD1: 3 * 600 t/d S
lStable operating conditions
lH2S content can be low, when the natural gas contains CO2 (example South Pars Field)
lPossible presence of heavy hydrocarbons at SRU inlet (aromatics)
SRU Feedstocks main characteristics
nREFINERY UNITS
lLower sulphur production capacity
lUp to a few hundreds tons/day sulphur
LEUNA refinery 420 t/d sulphur
Bukhara refinery 20 t/d sulphur
lH2S rich acid gas feed (no or little CO2)
lOperation with variable acid gas capacity
lLarge flexibility and turn down requirement
lPresence of ammonia in significant quantities
Sulphur Recovery Efficiency
èVaries according to the specific local regulations and the capacity of the sulphur plant
èfrom 95% to 99.9+ %
èThe environmental regulations are becoming more and more stringent in most countries
دانلود پاورپوینت SULPHUR RECOVERY