Petroleo Brasileiro S.a. - Petrobras

Petroleo Brasileiro S.a.

Eduardo Cardoso De Melo Guerra

Wilson Kenzo Huziwara

José Mozart Fusco

Aurélio Medina Dubois

José Geraldo Furtado Ramos

Emanuel Freire Sandes

Paulo Sérgio Freire

Valmor Neves Vieira

Waldir Pedro Martignoni

A system for sealing the legs of two stages of cyclones in series used in fluid catalytic cracking (FCC) processes, comprising a terminal leg configuration, which is devoid of moving parts and makes use of a long-radius curve, and which changes the flow direction of the descending mass flow of catalyst in dense phase into a plane orthogonal to the ascending gaseous flow. This prevents the entry of gaseous phase inside the leg, and promotes efficient sealing and preventing the 'packing-down' of the dense bed of particulates.

Sealing system for cyclone leg

An improved cyclone system for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes with reduced coke formation in disengager vessels, without favoring release of the disengaged catalyst into cyclones in subsequent stages, said system comprising legless cyclonesfitted with external collector pipes, is described. The collector pipesoptimize the purge of gases coming from the disengager vessel, reducing the time the hydrocarbons remain inside the disengager vessel, thus preventing overcracking and subsequent coke formation. Positioning of the external collector pipesprevents release of the disengaged catalyst into cyclones in subsequent stages. The present invention also relates to a process and device for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes, reducing coke formation in disengager vessels and minimizing the release of catalyst into consecutive stages, said process and device being part of the system of the present invention.

Process for disengaging solid and gaseous particles in FCC processes with reduced coke formation in disengager vessels

An improved cyclone system for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes with reduced coke formation in disengager vessels, without favoring release of the disengaged catalyst into cyclones in subsequent stages, said system comprising legless cyclonesfitted with external collector pipes, is described. The collector pipesoptimize the purge of gases coming from the disengager vessel, reducing the time the hydrocarbons remain inside said disengager vessel, thus preventing overcracking and subsequent coke formation. Positioning of the external collector pipesprevents release of the disengaged catalyst into cyclones in subsequent stages. The present invention also relates to a process and device for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes, reducing coke formation in disengager vessels and minimizing the release of catalyst into consecutive stages, said process and device being part of the system of the present invention.

Cyclone system for disengaging solid and gaseous particles in FCC systems with reduced coke formation in disengager vessels

A distributor ( ) for the equalization of flow rate of cyclones in closed cyclone systems installed in the interconnection of the cyclones of the disengager vessel of the gas-solid suspension of the fluid catalytic cracking (FCC) processes is described, that distributes the gases exiting the first stage cyclones so as to promote a desirable and uniform flow rate of said gases through said space, besides absorbing the relative movements between the cyclones caused by the differential thermal expansion. The distributor of the invention secures a homogeneous accommodation of the gas-solid suspension in a connecting pipe, allowing a uniform cyclone operation in the next stage, no matter the geometry of the riser-cyclone set or of the downer-cyclone set.

Closed cyclone system having a flow rate distributor and use of same

A cyclone leg sealing system is composed of one or more intermediate solids-accumulation chambers delimited by two sealing valves and in series, the function of the valves being to prevent the back-flow of particulate material towards the inside of the separating cyclones in fluid catalytic cracking (FCC) processes, thereby ensuring the maximum efficiency of the separating effected by the cyclone.

Growing community of inventors

Petrópolis, Brazil

Eduardo Cardoso De Melo Guerra