Under-liquid fire extinguishing system for oil tank

Abstract

The invention discloses an under-liquid fire extinguishing system for an oil tank. The system comprises a foam liquid distributor, wherein a foam liquid distributing joint is arranged on the foam liquid distributor; a second flange is connected to the foam liquid distribution joint, and the second flange is fixedly connected to a first distribution pipe; the first distribution pipe is fixedly connected to a third flange which is fixedly connected to the input end of a foam generator; a fourth flange which is fixedly connected to a reducing joint is fixedly connected to the output end of the foam generator; and the reducing joint is fixedly connected to a second distribution pipe which is connected to a nozzle pipe. According to the under-liquid fire extinguishing system for the oil tank, foam liquid in the foam liquid distributor enters the first distribution pipe through the foam liquid distribution joint, and the foam liquid further flows into the foam generator; when petroleum at the lower part of a floating cover is fired, the foam generator is started, and foam is injected through the output end of the foam generator; the injected foam enters the second distribution pipe and then is injected out through the nozzle pipe; seams in the circumferential side of the nozzle pipe are filled with the foam, and thus the petroleum at the lower part of the floating cover is insulatedfrom air, and as a result, the fire is extinguished.

Description

technical field [0001] The invention relates to the fire protection field, in particular to an oil tank submerged fire protection system. Background technique [0002] Oil tank is a kind of steel container equipment, which is mainly used to store and transport liquid and gaseous materials in petroleum refining industry and petrochemical industry. With the rapid development of petrochemical industry, the application of oil tank has also been further developed, and the number has increased rapidly , the requirements for oil tanks are getting higher and higher. The international "Petrochemical Enterprise Design Fire Protection Code" puts forward the requirement that sufficient fire protection measures must be designed for oil tanks so that they have sufficient fire protection capabilities and can be used to fight fires that occur. . [0003] Most of the current oil tanks use a foam fire extinguishing system that sprays above the liquid. The system is generally installed on the...

AI Technical Summary

Problems solved by technology

[0003] Most of the current oil tanks use a foam fire extinguishing system that sprays above the liquid. The system is generally installed on the top of the tank. This method is simple in design and easy to maintain. However, because the foam injection port is located on the top of the foam fire extinguishing system, the foam will It is greatly disturbed by wind direction, wind force, flame and heat, so it is difficult to fall into the sealing rubber plate or oil surface between the floating roof and the tank wall, and as the liquid level in the tank drops, the foam injection port and the sealing The distance between the rubber plate or the oil surface is larger, and the foam utilization rate is greatly reduced

Images