Annular water mist fire extinguishing system of oil storage tank

Abstract

The invention discloses an annular water mist fire extinguishing system of an oil storage tank. The annular water mist fire extinguishing system is characterized in that a metal bracket floating on the oil surface is arranged inside the oil storage tank; a water mist spraying device is arranged on the metal bracket; the spraying device communicates with a high pressure water feeding device at the outer part of the oil storage tank; the water mist spraying device comprises a water collector arranged at the circle center part of an aluminum alloy ring and six radial metal tubes, and further comprises an inner annular metal water tube, a middle annular metal water tube and an outer annular metal water tube which form a concentric circle structure; the near-ends of the metal tubes communicate with the water collector, and the far-ends of the metal tubes communicate with the inner annular metal water tube, the middle annular metal water tube and the outer annular metal water tube; and a plurality of water mist nozzles are uniformly arranged on each of the inner annular metal water tube, the middle annular metal water tube and the outer annular metal water tube in the circumferential direction. According to the annular water mist fire extinguishing system, with the fire extinguishing conditions met, the fire extinguishing water mist is directly sprayed to ignition combustion areas in the tank, so that the purpose that the fire is extinguished more quickly and effectively is achieved, the temperature of combustible gases in the tank can be decreased more quickly, and secondary combustion and explosion are prevented.

Description

Technical field: [0001] The invention relates to an annular fine water mist 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, the consumption of oil products in our country has been increasing rapidly, and severe fire accidents of oil storage tanks have occurred frequently. However, the fire extinguishing speed of the traditional foam fire extinguishing system is slow, the phenomenon of wasting fire extinguishing agent is very serious, and it will also cause secondary pollution; at the same time, the oil after fire extinguishing is difficult to be used due to the pollution of foam, and the economic loss is relatively large. The most important thing is that when the foam fire extinguishing system is used, the temperature inside the tank remains high after the fire is extinguished. Once the amount of foam applied is not enough, due to the bursting of ...

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Problems solved by technology

However, the fire extinguishing speed of the traditional foam fire extinguishing system is slow, the waste of fire extinguishing agent is very serious, and secondary pollution will also occur; at the same time, the oil after fire extinguishing is difficult to be used due to the pollution of foam, and the economic loss is relatively large.

The most important thing is that when the foam fire extinguishing system is used, the temperature in the tank remains high after fire extinguishing. Once the amount of foam applied is not enough, due to the bursting of a large number of foams at high temperature, part of the oil surface may be exposed again, resulting in secondary reburning

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