Annular foam fire extinguishing system of oil storage tank

Abstract

The invention discloses an annular foam fire extinguishing system for an oil storage tank: a buoyancy support suspended on the oil surface and a fire extinguishing foam spraying device are arranged in the oil storage tank, and the fire extinguishing foam spraying device supplies fire extinguishing foam through the pipeline and the outside of the oil storage tank. The transmission device is connected; the bottom of the buoyancy support is equipped with a supporting float; the fire extinguishing foam injection device consists of a foam buffer collector located at the center of the aluminum alloy ring and eight fire extinguishing foam delivery pipes that are radially and equally distributed on the outer periphery of the foam buffer collector Composition, eight fire extinguishing foam delivery pipes are in the same plane, and the proximal end of each fire extinguishing foam delivery pipe is connected with the foam buffer collector, and the far end of each fire extinguishing foam delivery pipe is connected with the annular fire extinguishing foam pipe, and the annular fire extinguishing pipe A plurality of fire extinguishing foam outflow holes are equally arranged on the foam pipe along the circumferential direction. The fire extinguishing foam outlet of the present invention keeps a constant distance from the liquid surface all the time, so as to effectively save the fire extinguishing foam.

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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