METHOD AND DEVICES USED IN THIRD-STAGE CYCLONE SYSTEMS IN FCC UNITS

The present invention applies, in particular, to third-stage cyclone systems, equipment normally used in conjunction with fourth-stage cyclones to reduce the concentration of catalyst particles in flue gases of fluid catalytic cracking (FCC) units. The invention relates to a method in which the blee...

Full description

Saved in:
Bibliographic Details
Main Authors MARINI Fabio, RODRIGUES CODECO Leonardo, PATRICIO JUNIOR Nelson, FREIRE Paulo Sergio, DE CARVALHO SCHMIDT Daniel, SABINO DA SILVA Fabio, MEDEIROS Jorivaldo, DE OLIVEIRA WARDIL Gustavo, COELHO SCHIAVO Raphael, FREIRE SANDES Emanuel, KENZO HUZIWARA Wilson, CAMPOS GONCALVES TEIXEIRA Herbert, DE OLIVEIRA MENDONCA Claudio, FONSECA MACHADO DOS SANTOS Claudio, CARLOS CANDIDO William Victor
Format Patent
LanguageEnglish
Spanish
Published 09.03.2023
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:The present invention applies, in particular, to third-stage cyclone systems, equipment normally used in conjunction with fourth-stage cyclones to reduce the concentration of catalyst particles in flue gases of fluid catalytic cracking (FCC) units. The invention relates to a method in which the bleed stream from the third-stage cyclone vessel is drawn continuously through the top of the third-stage vessel, using the extensive length of this vessel to incorporate a natural separation step, in which the particles in this stream come away from the gas ascending in the vessel at low speed and return to the bottom of the vessel. The material collected by the third-stage cyclones accumulates in the cone of the vessel and is removed at regular intervals. This method is intended to increase the overall separation efficiency of the system, and is a low-cost solution compared to the use of full blocking filters. La presente invención es aplicable, especialmente, a sistemas de ciclón de tercera etapa, equipo usado normalmente junto con ciclones de cuarta etapa para reducir la concentración de partículas de catalizador en los gases de combustión de unidades de Termodesintegración Catalítica de Fluidos (FCC). La invención se refiere a un proceso donde la corriente de purga del recipiente de tercera etapa de ciclón se remueve continuamente de la parte superior del recipiente de tercera etapa, usando la longitud extensa de este recipiente para introducir un paso de separación natural, donde las partículas presentes en esta corriente se liberan del gas que asciende al recipiente a baja velocidad, retornando a la parte inferior del recipiente. El material recolectado por los ciclones de tercera etapa se acumula en el cono de recipiente, que se descarta del mismo a intervalos regulares. Este proceso propone incrementar la eficiencia de separación global del sistema, que es una alternativa de más bajo costo en comparación al uso de filtros de bloqueo total.
Bibliography:Application Number: MX20230002270