Filtering retention system for recovery of hydrocarbon leaking from small sized electrical transformer placed in electrical post, has filtering belt that is permeable to water, and retaining unit for retaining hydrocarbons in liquid

摘要

The system has an evacuation device (5) for evacuating liquid contained in a recovery tank (4). The device has a set of walls (7) forming an evacuation cavity. A space is formed between the walls of the device and bottom of the tank. The device includes a filtering belt (12) arranged on the bottom of the tank for filtering the liquid contained in the tank before reaching the evacuation cavity. The belt is permeable to water, and includes a retaining unit for retaining hydrocarbons in the liquid.