FCC feed injector with closure plug
US6346219B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1998 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Nov 20, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7909
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid feed distributor improves particle and feed contacting by using a flow actuated plug to prevent back flow of fluidizable particles through a fluid feed outlet when fluid feed to a riser conduit ceases. The plug is located at or near the bottom of a riser contacting conduit where a back flow of particles can occur. The plug drops into the fluid feed outlet when fluid flow stops. The plug and a supporting stem will usually have an at least partially vertical orientation to provide the preferred gravity closure of the flow actuated plug. The plug arrangement can also provide improved feed distribution. Preferably the fluid actuated plug will act in conjunction with a fluid dispersion device. The dispersion device may be located upstream in a feed conduit that houses the plug and a fluid outlet at its downstream end. In addition, the fluid actuated plug can also serve to adjust the dispersion of feed fluid during operation of the unit. The restricted opening that receives the plug may comprise a spray nozzle that further improves feed dispersion. A restricted opening in the form of a venturi offers particularly advantageous feed distribution benefits when cooperatively arranged…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.