Sludge dewatering and destruction within a delayed coking process
US4968407A · kind A · utility
14Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1988 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Apr 25, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10B57/045
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Wet refinery sludges are disposed of by feeding them into a delayed coking process. The sludge is fed to the blowdown drum of the delayed coking process and mixed with oil condensed from the coke drum overhead, and the resulting sludge-oil mixture is fed to the coke drum where it is converted into coke. In order to remove the water from the sludge, a portion of the sludge-oil mixture is heated and recirculated to the blowdown drum where it provides the heat for drying and heating the sludge. The recirculating sludge-oil mixture is heated by a low level heat source, such as one of the fluid streams taken off from the fractionator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.