Process for treating an aqueous refinery waste suspension to provide effluent, and an oil refinery waste processing system to provide liquid effluent

摘要

"PROCESS FOR TREATMENT OF A WATER REFINERY WASTE SUSPENSION TO PROVIDE AN EFFUENT FROM WHICH OIL PRODUCTS CAN BE RECOVERED AND A SUBSTANTIALLY PIE FREE OF HDROCARBID WASTE". A refinery refuse feedstock is sieved through a sieve (14) to remove large particles and is diluted to less than 5 wt.% Solids to form a first suspension, which is stirred and heated to 82 ° C. C in a conditioning reactor vessels (18). The first conditioned suspension is passed through a first centrifuge (22), which separates the first conditioned suspension 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 suspension and lyse and / or release petroleum compounds and oxidize toxic polycyclic aromatic hydrocarbons to non-toxic derivatives. The second suspension is passed through a centrifuge, providing a second liquid effluent and a residual cake containing about 0.5% or less petroleum and about 70% solids, which can be directly grounded or dehydrated as required.