METHOD AND SYSTEM FOR RECOVERING WASTE AND CLEANING A HYDROCARBON STORAGE TANK

摘要

The present invention relates to a method for recovering waste and cleaning a hydrocarbon storage tank (1), characterised by the following steps: (a) evaluating the viscosity of dregs (9) on the bottom of the tank (1); when heavy hydrocarbons are present, carrying out the following steps: - solubilising the dregs (9) in order to produce solubilised hydrocarbon; - draining the solubilised hydrocarbon from the inside of the storage tank (1); after the solubilised hydrocarbon has been drained, or when the dregs contain no heavy hydrocarbons, continue to step (b); (b) stirring the dregs remaining inside the tank (1) together with water, then letting it settle until the water and hydrocarbon separate; (c) removing at least either the water or the hydrocarbon remaining in the tank. The present invention further relates to a system for recovering residues and cleaning a hydrocarbon storage tank.