SYSTEM FOR PROCESSING OIL REFINERY WASTE

摘要

Refinery waste feedstock is screened in a screen (14) to remove large particles and is diluted to less than 5 % solids weight percent to form a first slurry which is agitated and heated to 180 degrees Fahrenhei t in a conditioning vessel (18). The conditioned first slurry is passed through a first centrifuge (22) which separates the conditioned first slung into a first liquid effluent and a first residual cake. The first residual cake is diluted with hot water and treated with hydrogen peroxide in a reactor tank (26) to form a second slurry and lyre and/or liberate petroleum compounds and oxidize toxic polycyclic aromatic hydrocarbons to non-toxic derivatives. The second slurry is passed through a centrifuge (32), yielding a second liquid effluent and a residual cake containing about 0.5 % or less petroleum and about 70 % solids, which may be landfilled directly or further dewatered as needed .