Benzene NESHAP Compliance Improvement (BNCI)
Completion Date
2012
Services
Plant Design
Civil / Structural
Industry
Refining & Chemical
Location
South East
C&I is handling the complete engineering for this refinery client’s Benzene removal effort. The overall objective of the Benzene NESHAP Compliance Improvement (BNCI) project is to meet the consent decree which requires the mass of benzene in an uncontrolled sewer system to be less than 4.8 mega-grams per year (MG/yr) and provide additional protection against spills and upsets within the Petrochemical (P-Chem) Units. The amount of benzene will be measured at the discharge of the API Separators. The refinery currently meets the requirements of the Benzene Waste Organic NESHAP (BWON), 40 CFR 61, Subpart FF, by operating two separate sewer systems. One sewer system is controlled per the BWON requirements, while the other system is uncontrolled. The consent decree applies to the uncontrolled sewer system.
In addition, the existing oily water sewer system for the Petrochem Area will be converted to a controlled sewer system and connected to a new lift station via a new NESHAP Header. Two new Feed Tanks will be installed to collect and buffer the process waste streams and storm water pumped from the new lift station for treatment by the Benzene Flash drum.
Increased Benzene removal capacity will be accomplished by means of the installation of two new flash drums with overhead condensers, overhead receivers, overhead oil pot and related pumps and exchangers. The Desalter Flash Drum will pre-treat the combined effluent water from the #3 Crude Unit and #5 Crude Unit Desalters prior to being sent to the API Separator. The Benzene Flash Drum will pre-treat highly concentrated wastewater streams from various lift stations, recovery wells, and overhead receivers/accumulators and prior to being returned to the NESHAP sewer.The BNCI project requires the integration of capital project work, area operations, maintenance team activities, and all turnaround activities occurring within the defined project areas. Coordination of these activities has been imperative to the success of this project.