Riser separation systems

An apparatus for separating a gaseous mixture from a stream of particles entering from a riser reactor used for cracking a hydrocarbon feed with said stream of particles, said apparatus comprises:

• a reaction vessel comprising a lower stripping bed area and an upper secondary separator area;
• a riser reactor within the reaction vessel, the riser reactor defining a longitudinal axis and including a riser reactor inlet at one end for receiving the hydrocarbon feed and the stream of particles and at least one riser reactor outlet at an opposite end for evacuating a mixture of cracked gases and solid particles;
• a separation vessel defined proximate to the at least one riser reactor outlet, the separation vessel comprising, in an alternating manner, at least one separation chamber and at least one collection chamber distributed about the longitudinal axis, each separation chamber comprises two vertical lateral walls which also comprise a wall of the adjacent collection chamber, the separation chamber including a separation chamber inlet in an upper area of the separation chamber communicating with the riser reactor;
• and
• a lateral separation chamber outlet defined in at least one of the vertical lateral walls to provide fluid and particle communication from the separation chamber to an adjacent one of the at least one collection chamber, wherein each collection chamber comprises a collection chamber outer wall that extends from the lateral separation chamber outlet into the lower stripping bed area, and wherein each separation chamber further comprises a separation chamber outer wall that extends from the separation chamber inlet into the lower stripping bed area.