Annular foam fire extinguishing system of oil storage tank

Abstract

The invention discloses an annular foam fire extinguishing system of an oil storage tank. The annular foam fire extinguishing system is characterized in that a buoyancy bracket floating on the oil surface and a fire extinguishing foam spraying device are arranged inside the oil storage tank; the fire extinguishing foam spraying device communicates with a fire extinguishing foam feeding device at the outer part of the oil storage tank through a pipeline; supporting floating balls are arranged at the bottom of the buoyancy bracket; the fire extinguishing foam spraying device comprises a foam buffer collector arranged at the circle center part of an aluminum alloy ring and eight fire extinguishing foam conveying tubes which are uniformly and radially distributed on the periphery of the foam buffer collector; the eight fire extinguishing foam conveying tubes are positioned in the same plane; the near-ends of the fire extinguishing foam conveying tubes communicate with the foam buffer collector, and the far-ends of the fire extinguishing foam conveying tubes communicate with an annular fire extinguishing foam tube; and a plurality of fire extinguishing foam outflow holes are uniformly formed in the annular fire extinguishing foam tube in the circumferential direction. According to the annular foam fire extinguishing system, fire extinguishing foam outlets always keep constant distance with the liquid surface, so that the purpose that the fire extinguishing foam is effectively saved is achieved.

Description

Technical field: [0001] The invention relates to an annular foam fire extinguishing system for an oil storage tank, which belongs to the field of fire prevention and fire science and technology. Background technique: [0002] In recent years, my country's consumption of oil products is increasing day by day, and oil storage tank fires are also increasing day by day, resulting in many serious and extraordinarily serious fire accidents. Regardless of whether it is a floating-roof oil storage tank or a fixed-roof oil storage tank, the most notable feature of the oil combustion process in the tank is that the combustion area always occurs in a circular combustion within a certain diameter range close to the pipe wall, while the center of the tank body A certain diameter area is in a non-combustible state due to lack of oxygen, and its combustion diameter range is also very limited. Therefore, the most important thing in the fire extinguishing process of the oil tank fire is to ...

AI Technical Summary

Problems solved by technology

And for the existing foam fire extinguishing system of oil storage tank, either the fire extinguishing foam produced by the foam generator on the top of the tank body flows to the oil surface along the inner wall of the tank, and when the liquid level is low, most of the fire extinguishing foam is burnt by high temperature flame and bursts

However, the submerged supply of fire extinguishing foam may cause backflow under the high pressure of combustion in the tank, causing unforeseen catastrophic consequences

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