One kind of catalytic cracking - a combination of delayed coking process for producing needle coke

The present invention discloses a catalytic cracking - delayed coking method for the production of needle coke combination of processes, including the following: (1) raw oil catalytic cracking unit into the catalytic cracking reaction of the oil into the separated gas fractionator, gasoline fraction, diesel distillate and catalytic slurry oil; catalytic oil (2) step (1) the resulting slurry was filtered backward delayed coker, when the delayed coking unit processing amount to 60% -80% of its total process, step (1) the separated gas produced oil, gasoline fraction, and the remaining fraction is filtered all entered the delayed coker; (3) when a delayed coking unit to reach its total treatment was stopped oil, coke drum switch, coking scorched stage, needle like coke deposited on the bottom. The method of obtaining qualified cracking products but can be high in fiber structure, high-quality needle coke products.