METHOD OF PROCESSING OILY WASTES (SLUDGES) Russian patent published in 2017 - IPC C02F11/10 C02F11/18 

FIELD: waste processing and recycling.

SUBSTANCE: invention relates to processing of oily wastes (sludges) and can be used in oil, petrochemical and other branches of national economy, at industrial facilities with formation, warehousing and prolonged storage in earth barns or concrete sludge collectors of any volumes of oily wastes – hazardous source of environmental pollution. Method consists of an auxiliary process in form of grinding sludge with removal of large organic inclusions and unbound water and a main process consisting in thermal treatment of sludge. Main process is carried out in three successive steps, namely, preliminary heating of filler (crushed stone and gravel), its mixing with sludge, heating a mixture of sludge with filler to temperature of 450–500 °C for low temperature pyrolysis in same reactor heated during entire main process with separation of mixed media at each stage into two partially overlapping counter-streams with reversing motion mode, wherein first two steps of main process and beginning of third, during which complete dehydration of mixture is completed, is implemented in reactor at atmospheric pressure, and from beginning of pyrolysis in reactor excess pressure is maintained within range of 0.1–0.2 MPa with supply of gaseous pyrolysis products as additional fuel for heating mixture of sludge with filler through heat transfer tight partition between furnace and reactor.

EFFECT: reduced power consumption, higher efficiency of processing oil sludge.

1 cl, 1 dwg