METHOD FOR CLEANING RESERVOIRS AND APPARATUS FOR REMOVING RESIDUES OF HAZARDOUS MATERIAL FROM THE RESERVOIR

摘要

1. A method of removing residues of hazardous materials from a tank, characterized in that the gas mixture is passed a) through a tank containing residues of hazardous material at a temperature of at least 5 ° C higher than the melting temperature and lower than the self-ignition temperature of the hazardous being removed material, b) the resulting steam mixture is passed from the tank through the exhaust unit to the extraction unit, c) it is cooled in the extraction unit to a temperature of at least 5 ° C lower and higher than the melting point th material, d) the liquid components of the vapor recovered, a dry gas mixture recycled to the tank organize while re-heating to a temperature corresponding to a position), e) said recirculation is repeated until the desired level of hazardous materiala.2. The method according to claim 1, characterized in that the gas mixture is a dry gas mixture. The method according to claim 1 or 2, characterized in that in the last stage, the residual unwanted material is removed using a scrubber. The method according to claim 1, characterized in that the hazardous material is benzene. The method according to claim 4, characterized in that the benzene is cooled to a temperature greater than 6 ° C. The method according to claim 4, characterized in that the cooling is carried out using chilled water. The method according to claim 4, characterized in that the temperature of the initial gas mixture is a temperature from 11 to 30 ° C. The method according to claim 1, characterized in that the contents of the reservoir are preheated prior to passing the initial gas mixture to the desired temperature level. The method of claim 8, wherein �