Introduction to slurry dewatering technology

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Removing solids and impurities from catalytic slurry has always been a challenging task in the petrochemical industry. Over the past two decades, CNPC and Sinopec, together with domestic and international technology suppliers and research institutions, have carried out numerous research and development efforts as well as industrial experiments; they have also introduced technologies that have been successfully used abroad, but all these attempts ended in failure. With the advancement in production technologies for needle coke and carbon black materials, as well as the introduction by the International Maritime Organization of new standards for low-sulfur marine fuel oils, the purification of FCC slurry has become even more urgent. Under such circumstances, new breakthroughs are needed in slurry purification technology. Our company has installed a catalytic crude oil slurry inorganic membrane side-stream purification unit at a certain refinery for industrial testing, where the solid-removed catalytic oil slurry is blended with hydrogenated residue to produce low-sulfur heavy marine fuel oil. This device began long-term operation in October 2018. The solid content of the purified oil slurry remains stable