The invention discloses method and device for partitioning catalytic
cracking on coking waxen oil, which are mainly used for solving the problem that the process
product distribution becomes poor because alkalic oxides preferentially absorb on the acidic activity center of a catalyst to reduce the activity and the selectivity of the catalyst when the coking waxen oil is mixed and melted in a catalytic
cracking process. In the invention, a catalytic
cracking lifting
pipe reactor is divided into an upper reaction region and a lower reaction region, wherein the lower reaction region is in a vertical sleeve structure which is divided into an inner sleeve region and an outer sleeve region that are independent to ensure that the coking waxen oil enters the inner sleeve region for carrying out catalytic
cracking reaction and conventional raw materials enter the bottom of the upper reaction region to be in contact and react with a refresh regenerable catalyst from an annular space region of the vertical sleeve structure of the lower reaction region to ensure that the refresh regenerable catalyst being in contact with the conventional raw materials are free of being damaged by pollutants of basic
nitrogen and the like brought in by the coking waxen oil, so as to achieve the purposes that the conventional raw materials are fully cracked and excellent
product distribution is obtained. The
material flow after the coking waxen oil is subjected to the
primary reaction and then joined with the conventional raw materials in the upper reaction region and then passes through the lifting
pipe reactor and enters a
settling and stripping
system together with the conventional raw materials. Compared with the conventional catalytic cracking mixing and melting coking waxen oil, the invention remarkably improves the liquid yield while increasing the mixing amount of the coking waxen oil.