Compressed air foam fire extinguishing device for large floating roof storage tank

Abstract

The invention discloses a compressed air foam fire extinguishing device for a large floating roof storage tank. The device consists of a foam solution generation mechanism, an air source and an air conveying dry pipe thereof, a foam release mechanism, a fire monitoring alarm and a box type compressed air foam generation mechanism. The device has multiple use modes, can be combined with such release devices as compressed air foam guns, cannons, nozzles or release pipes for use, is applied in such multiple modes as compressed air foam automatic spraying, compressed air foam fire hydrants and compressed air foam automatic seeking cannons, and effectively satisfies actual fire extinguishing demands of the large floating roof storage tank. The performance of the device is obviously superior to that of a traditional large outer floating roof storage tank low-power foam fire extinguishing system; and the defects of the low-power foam fire extinguishing system can be made up. The device not only can be applied to a newly built large floating roof storage tank, but also can be used for upgrading and reconstruction based on the tank wall type low-power foam fire extinguishing system of the traditional large floating roof storage tank.

Description

technical field [0001] The invention belongs to a fixed fire extinguishing device, in particular to a compressed air foam fire extinguishing device for a large floating roof storage tank. Background technique [0002] Large-scale floating roof storage tanks, especially external floating roof storage tanks, have the advantages of low oil loss, environmental protection, excellent safety performance, and land saving, and have become the main facilities for oil reserves in various countries. In recent years, my country's large-scale external floating roof storage tanks have developed very rapidly, and the built volume has reached 100,000 m 3 and 150,000 m 3 There are hundreds of external floating roof storage tanks in China. Large external floating roof storage tanks are mostly used to store crude oil with low flash point, strong volatility, and high combustion calorific value. Once a fire occurs, it will quickly form a large area of ​​combustion, and cause boiling over and sp...

AI Technical Summary

Problems solved by technology

The compressed air foam fire extinguishing system of this mode is quite different from the existing low-expansion foam fire extinguishing system of the floating roof storage tank. The foam delivery pipeline is long, considering that the compressed air foam is a multi-component complex system of gas-liquid two-phase flow, so the hydraulic calculation and engineering design of the pipeline are difficult

In addition, for the floating roof storage tanks that are currently equipped with tank wall low-expansion foam fire extinguishing systems, the above-mentioned compressed air foam fire extinguishing system cannot be used for upgrading

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