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CNOOC commissions DuPont wet scrubbing system

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Hydrocarbon Engineering,

CNOOC Orient Petrochemicals Co. Ltd (CNOOC) recently commissioned a DuPontTM BELCO® EDV® wet scrubbing system at its oil refinery on Hainan Island, China. With the help of this system, the refinery will minimise atmospheric emissions of fine particulate and sulfur oxides (SOX) from its 1.2 million tpy fluid catalytic cracking unit (FCCU).

This refinery is one of CNOOC’s major refining bases. The company has invested extensively to dramatically reduce emissions and improve the quality of gasoline and diesel to meet new Chinese national emissions standards.

The wet scrubbing system is a proprietary process that cleans combustion flue gases from FCCUs – a major refinery upgrading unit that produces valuable gasoline, diesel and petrochemical feed stocks from heavier, less desirable petroleum products. The system was fitted by Beijing Milestone Technologies (MSTN) under license from DuPont Clean Technologies. MSTN and DuPont have licensed and supplied over 60 new BELCO EDV wet scrubbing systems for FCCUs in China, preventing over 200 000 tpy of air pollutants from SOX and fine particulate emissions to the atmosphere.

“With China’s oil refining capacity, currently over 700 million tpy and set to exceed 900 million t within a few years, refinery emissions control is an environmental imperative for the country,” said DuPont Clean Technologies Global Business Director, Eli Ben-Shoshan. “DuPont Clean Technologies works with refinery and sulfuric acid industry customers around the world to tailor their ranges of emissions control solutions to meet site-specific environmental, cost and operational goals.”

The system reliably controls particulate, SOX and NOX emissions in a single upflow tower, thereby eliminating the need for separate control device to manage different emissions. With its unique open-vessel design and non-plugging features, the BELCO EDV wet scrubbing system is proven to support uninterrupted FCCU operation, where units typically operate continuously for 3 – 7 years without any maintenance or service shutdowns. It is engineered to handle severe upset conditions including high-particulate carry over and high-temperature excursions.

CNOOC also uses BELCO scrubbers to control emissions from a 4.9 million tpy FCCU and 1.2 million tpy FCCU at its Huizhou Refinery in Guangdong Province.

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