Feed injection system for catalytic cracking process
US6387247B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/0027
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalytic cracker riser reactor is connected to a regenerator standpipe through which hot, regenerated catalyst enters the riser bottom region. A hydrocarbon feed, such as gas oil, and dispersing gases, such as steam, are introduced through a single bottom entry nozzle assembly. The nozzle assembly comprises three concentrically arranged conduits. An inner conduit provides a passageway for a first dispersing gas and terminates in a first cap having at least one outlet passage for discharging the first dispersing gas in a generally radially outward and upward direction. The first conduit and first cap are enclosed by a second conduit and second cap, the annulus formed thereby providing a passageway for a liquid hydrocarbon feed. The second cap also has at least one outlet passage for discharging the mixture of hydrocarbon feed and first dispersing gas into the riser reactor in a radially outward and upward direction. A first dispersing gas enters the inner conduit and proceeds to the first cap into a mixing zone located in the vicinity of the discharge passage between the first and second caps. Hydrocarbon feed enters the second conduit, continues through an annulus to the second …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.