Regenerator for catalytic cracking unit with external cyclones

摘要

Regenerator for catalytic cracking unit comprising a first part occupied by a dense fluidized bed of catalyst and a second part positioned above the first part and occupied by a fluidized bed of low solid particles density, the said second part comprising one internal device covering, by projection onto the plane of the cross section of the said vessel of the regenerator, at least 80% of the said cross section, the said regenerator being equipped with at least one cyclone for separating gases/solids in the mixture derived from the low-density bed, the said cyclone being placed outside the vessel of the regenerator.

主权项

1. A regenerator for catalytic cracking unit formed of a vessel comprising a first part intended to be occupied by a dense first fluidized bed of solid particles and a second part positioned above the first part and intended to be occupied at least partly by a second fluidized bed of low solid particles density, the second part comprising one internal device covering, by projection onto a plane of a cross section of the vessel, at least 80% of a free cross-sectional area of the vessel of the regenerator, the vessel being equipped with at least one cyclone for separating a mixture of gas and solid particles derived from the second fluidized bed, the cyclone being placed outside the vessel, and the cyclone being designed to collect the mixture of gas and solid particles and comprising a plurality of pipes opening inside the vessel, under the internal device, and without passing through the internal device,
wherein the cross section of the vessel is a plane perpendicular to an axis of the vessel and perpendicular to a direction in which the mixture of gas and solid particles flows, wherein the internal device is made up of one or more individual elements, each individual element being made up of one or more plate stages, each of the plate stages comprising a plurality of plates, wherein each of the plurality of plates is inclined parallel to one another within a single plate stage, wherein the plurality of plates in the single plate stage are inclined at an opposite direction to the plurality of plates in an immediately adjacent plate stage, and wherein the plates of the internal device do not criss-cross.