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|State Police #||11-04988|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Sulfur Dioxide||1h 28m||Tail Gas Treater/Sulfur Incinerator Stack (591-D-21X)||NO||YES||NO||355.0 pounds|
|Sulfur Dioxide||25m||FLARE: Low Pressure Flare (308F-D-1)||NO||YES||NO||375.0 pounds|
Accident Classified As: Reportable Quantity
During operational adjustments to the air flow to SRU-592 Claus unit, the air blower discharge pressure decreased below the set point and diverted gas from the tail gas treater (TRT) to the SRU incinerator (591-D-21X) to the Low Pressure Flare (308F-D-1).
The discharge was unpreventable due to an unexpected decrease in discharge pressure in the SRU-592 Claus unit air blower.
SRU operations were stabilized allowing the flare valve to be closed and the tail gas to be routed back into the Tail Gas Treater.