A process fire extinguishing method for a flammable liquid storage tank

Abstract

A process fire extinguishing method for a flammable liquid storage tank. The flammable liquid is exported from the burning storage tank by the valve opening diversion method, and the heated combustible liquid is cooled by heat exchange during the diversion process by using a mobile cooling system to reduce the risk of being burned. Safety hazards such as explosion and spontaneous combustion of the exported high-temperature flammable liquid and cavitation to the transfer pump enable most of the flammable liquid in the burning storage tank to be safely transferred out. The mobile cooling system adopts modular design, including refrigeration system, heat exchange system, pipeline system, pipe diameter conversion system, power system, conveying system, auxiliary system and command system, and all or part of the system can be selected according to actual needs. Hot car, pipeline car, power car, pump car, auxiliary tool car and command car or several of them. Rapid maneuvering to the fire scene in an emergency can significantly reduce the economic losses, environmental pollution, secondary accident injuries and social impact caused by the fire.

Description

technical field [0001] This method belongs to the technical fire extinguishing method for storage tank fires of flammable liquids such as oil and liquid chemicals, and specifically involves transferring materials out of the burning storage tanks by opening valve diversion method, and cooling the materials before entering the delivery pump At the same time, combined with drainage, filling materials and other technological methods, as well as methods such as controlled combustion and foam coverage, the method of controlling and extinguishing fires is carried out. Background technique [0002] With the increase of economic development and social demand, the number of storage tanks for various oils represented by crude oil and other flammable liquid chemicals is increasing, and the volume of a single tank is increasing. At the same time, fire accidents in flammable liquid storage tanks occur from time to time. , causing serious economic losses and social impacts. [0003] At pr...

AI Technical Summary

Problems solved by technology

At present, the fire extinguishing method mainly uses the foam covering method to extinguish the fire. However, due to the large capacity of the storage tank and the large energy of the stored materials, the fire area is large, the flame temperature is high, and the heat radiation is strong under the fire state. It is difficult for the foam to cover the fire surface at one time. The lower foam is quickly destroyed by evaporation, and it is difficult to directly extinguish the burning storage tank, even if it is forcibly extinguished with high-strength foam, it is very easy to re-ignite

Process fire extinguishing methods mainly include valve closing and material cutting, valve opening diversion, stirring fire extinguishing, filling materials, system replacement, water removal, embankment diversion and other methods. The correct use of process fire extinguishing methods is conducive to quickly and effectively Control the fire, however, improper use of craft fire extinguishing methods will cause further expansion of fire accidents

The diversion method of opening the valve can rescue part of the materials in the storage tank, shorten the burning time, and reduce economic losses. The high-temperature flammable liquid heated by the heat wave not only poses a great safety hazard, but at the same time, the high-temperature flammable liquid will cause serious cavitation of the delivery pump and have to stop working. Therefore, the current valve-opening diversion method can only rely on experience. In the early stage of the fire, a small amount of flammable liquid is diverted. After the flammable liquid is heated to a certain temperature, the operation must be stopped to avoid a wider range of accidents and losses.

[0005] Since it is difficult to effectively extinguish fires in flammable liquid storage tanks due to fire extinguishing and process fire extinguishing, the current fire extinguishing method for flammable liquid storage tanks is mainly to control the combustion by spraying water on the outer wall of the burning storage tank and the outer wall of the adjacent storage tank. The fire is extinguished after the materials inside are burnt out, so the burning time is often as long as several days to several weeks. In the face of fire storage tanks, the surrounding storage tanks may be ignited at any time, causing a wider range of fires and losses, resulting in a large amount of stored materials. Losses, greatly consume fire emergency supplies, cause huge economic losses, environmental pollution and social impact

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