Abstract: The main progress of crude oil steam cracking technology and heavy oil DCC technology are introduced. The integrated and innovative application of crude oil steam cracking and heavy oil DCC technology is studied, and a new DCC integration technology is developed. Compared with the process oftraditional refining and petrochemical integrationtechnology, the innovative coupled refining and petrochemical process based on the DCC integration technology has the advantages of optimized unit configuration, short process flow, low crude oil demand, and high ethylene and propylene yields.The higher API gravity of DCC feed oil is, the more obvious the advantagesare.This innovative coupled refining and petrochemical process is applicable for not only the construction of new refining and petrochemical integration projects, but also the transformation and upgrading of existing refineries. It can be used to minimize the production of fuel oil and maximize the production of chemicals,which can help solve the problem of fuel oil oversupply. Therefore, the new intensive refining and petrochemical process based on DCC integration technology is an important solution for the refining and petrochemical enterprises to achieve the goal of “more chemicals with less fuel”, and will become an important technical guarantee for constructing new refining and petrochemical enterprises and the transformation and upgrading of existing refineries in China.

Key words: deep catalytic cracking, crude oil steam cracking, transformation and upgrading, new integration process