Case Study #1
REFINING COMPANY IN EUROPE OPTED FOR THE CLOSED COKE SLURRY SYSTEM OVER OPEN PIT FOR GRASSROOTS 4-DRUM DELAYED COKER
A refining operator in Europe planned to add a grassroots 4-drum delayed Coker to the existing refinery facilities. The refinery is located in an environmental sensitive area.
Authorities and neighborhood raised increasing concerns during project development despite the fact that the owner considered the utmost to cover the storage and loading facilities for dust free operation.
The open pit operation with high dust emissions and difficult sludge disposal was not acceptable. This technique is traditionally the beaten path, when designing a delayed Coker.
Due to the reasons mentioned above, the owner’s project team insisted already during planning stage to include the innovative Closed Coke Slurry System (CCSS) and initiated a systematic cost and technical comparison between open pit and the CCS System with active support from the engineering contractor.
The design concept for the 4-drum unit with a capacity of 1,000 to of Pet Coke per drum proposed the following main equipment: Crusher (4)/dewatering bins (3)/ sluice way (1)/ slurry pit (1)/ clean water pit (1)/ water settling tank (1)/ clean water tank (1)
In this case higher initial cost was estimated for the CCSS (approx. 20%). Owner and engineering contractor agreed to design the unit with the CCS system. The environmental advantages over open pit, namely free from dust and volatile organic components from cutting to load out with effective and sensible sludge disposal and water management were the decisive factors for the owner.
In addition to the environmental benefits, economical credits could be identified (e.g. credits for improved reliability, less field staffing, shorter cycle time due to effective bin dewatering etc.) which in sum enhanced the pay back situation for the higher CCSS investment by less than 2 years.