| 摘要 |
The invention relates to a method characterised by the heating operations thereof, which allow the extraction of the pollutant-free hydrocarbons and do not generate the risks of uncontrollable leakage via non-tight bottoms, which are associated with other methods. The heating operations are carried out in the following way: by means of devices submerged in the hydrocarbons and separate from the bottom of the tank, or by means of devices arranged outside the tank, on the suction lines and in areas adjacent to the shell of the tank; by means of injecting hot air into the tank, in order to fluidify the surface layer of hydrocarbons and to ventilate the tank and prevent the generation of explosive atmospheres; and by means of external heat exchangers which facilitate the filtering, decanting or subsequent transfers of the hydrocarbons. The method is applicable to tanks of oil, fuel oil and other viscous oil products, including tanks which are accidentally contaminated with water. |
