Patent ID: 7077998
Filing Date: 2006-07-18
Classification: B01J,C10G

Abstract:
1. A catalytic cracking reaction-regeneration system for conducting a catalytic cracking reaction on a hydrocarbon feed to produce a reaction oil-gas, said catalytic cracking reaction being carried out as a riser catalytic cracking reaction, an instantaneous contact catalytic reaction and/or a down-flow catalytic cracking reaction, said system comprising: a regenerator used for regenerating a coke-deposited spent catalyst from the catalytic cracking reaction, said regenerator comprising a flue gas pipe being equipped at the top of said regenerator, a regeneration air pipe being equipped at the bottom of said regenerator, and a regenerated catalyst delivery pipe also being equipped at the bottom of said regenerator; a settler having an upper section being used for the convergence and disengagement of the reaction oil-gas from the catalytic cracking reaction and a lower section being used for stripping the coke-deposited spent catalyst from the catalytic cracking reaction, the top of the settler being equipped with an oil-gas pipe which is connected to a separation system, and the bottom of said settler being connected with said regenerator via a spent catalyst delivery pipe; a gas-solid separator used for separating the reaction oil-gas and the coke-deposited spent catalyst from the catalytic cracking reaction, the separator having an inlet for the reaction oil-gas and the coke-deposited spent catalyst, the top of said gas-solid separator being connected with the upper section of said settler via a pipeline, and the bottom of said separator being connected with the lower section of said settler via another pipeline; a riser reactor used to carry out the catalytic cracking reaction as a riser catalytic cracking reaction, a lower section of said riser being connected with said regenerator via said regenerated catalyst delivery pipe and an upper section of said riser having an outlet for reaction oil-gas and coke-deposited spent catalyst; a horizontal reaction pipe used to carry out the catalytic cracking reaction as an instantaneous contact catalytic cracking reaction, one end of said horizontal reaction pipe being connected with the outlet of the upper section of riser reactor via a first valve (A), while the other end of said horizontal reaction pipe is connected with the inlet of said gas-solid separator; a buffer tank used for storing catalyst, said buffer tank also being connected to the outlet of the upper end of the riser reactor via a catalyst delivery pipe, said catalyst delivery pipe being coaxial with said riser reactor and located above said riser reactor; said catalyst delivery pipe being used for delivering catalyst from said riser reactor into said buffer tank by means of an elevating medium supplied to the riser reactor, a second valve (C) being equipped between said catalyst delivery pipe and said outlet of the upper section of said riser reactor; and a down-flow reactor used for carrying out the catalytic cracking reaction as a down-flow catalytic cracking reaction, the down-flow reactor having an upper section being connected with the buffer tank and a lower section being connected with said horizontal reaction pipe and said settler via a third valve (B).