Upflow delayed coker charger heater and process
US6241855A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Aug 24, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G9/005
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved process and article of manufacture to effectuate pressure reduction in a delayed coker charge heater's radiant heat section outlet and feedstock process coil, by upflowing coker feedstock through a single or double row, single or double fired, feedstock process coil. The innovative upflowing of coker feedstock as disclosed by the present invention allows BFW/Steam injection and vaporizing hydrocarbons to rise in the same flow direction as the coker feedstock, resulting in an enhanced mixing of fluid film and coker feedstock. Such enhanced mixing, in turn, increases heat transfer rates to the feedstock. As coker charge heater burners are commonly located in the bottom of the heater, the lower portion of the heater is typically the location of highest processing temperatures and tube side fouling. Upflowing the process coil places migrates the hottest processing section to a cooler location in the heater, and thus, contributes to conditions which reduce coking/fouling rates within the feedstock process coil, increase feedstock process coil tube life, reduce tube skin temperatures, and increase run time between decoking the interior portion of the feedstock process coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.