Method and device for quenching oil and petroleum products in tanks

The invention pertains to the field of fire-fighting techniques and relates to a method for quenching oil and petroleum products in a tank, which comprises feeding a fire-extinguishing mixture through a floating sprinkler that sprinkles the same above the surface of the burning liquid. The fire-extinguishing method comprises three steps: a first step that comprises installing a floating sprinkler connected by a duct and through an opening-closing device with an injector under the layer of burning liquid; a second step, after delivery of a signal from a fire indicator, of opening the opening-closing device on the injector and feeding the fire-extinguishing mixture through the duct and the floating sprinkler under the layer and/or at the surface of the burning liquid in the form of compact jets from the center to the periphery and parallel to the horizontal; a third step of surfacing the floating sprinkler above the surface of the burning liquid. In the device for quenching oil and petroleum products, the outle