Process for treating oil sludge
This patent describes a process for treating petroleum refinery sludge to produce a solid residue product. It comprises: forming a feed-stream of an oil petroleum refinery sludge containing organic solid material boiling about 1000{degrees} F. and water; pretreating the feed-stream to adjust the water content thereof to between about 5% and about 25%, based upon the total weight of the resulting pre-treated feed-stream; introducing the resulting pre-treated feed-stream into a thermal sludge drier wherein the pre-treated feed-stream is indirectly heated by a heat transfer medium; heating the pretreated feed-stream in the drier to a temperature above the boiling point of water and below the temperature at which thermal cracking of the feed-stream occurs; maintaining the heated feed-stream in a nonoxidative atmosphere in the sludge drier for a time sufficient for the water in the feed-stream to form steam and for the stream to strip any light hydrocarbons from the solid material in the feed-stream to form a solid residue; separating a hydrocarbon-water vapor stream from the solid material; and recovering the solid material as a solid residue product having a BTU content between about 3000 and 10,000 BTU/lb.
- Assignee:
- Thermal Waste Management, New Orleans, LA (USA)
- Patent Number(s):
- US 4985131; A
- Application Number:
- PPN: US 7-440471
- OSTI ID:
- 6126702
- Resource Relation:
- Patent File Date: 21 Nov 1989
- Country of Publication:
- United States
- Language:
- English
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