Characteristics of the hottest oil tank fire and p

2022-08-17
  • Detail

Oil tank fire characteristics and precautions for fire fighting measures

due to different types of oil storage, storage methods and conditions, the characteristics of oil tank fire are also different. Once an oil tank explodes, it will cause the tank body to crack, the tank cover to lift, fly out, or the bottom and middle of the tank wall to crack, resulting in the outflow of oil products for combustion. After the oil flows out, it will flow to the surrounding low-lying places, forming a large-area fire

there is a fire in the oil tank, some of which burn first and then explode, and some of which do not burn after explosion

after a fire occurs in light oil storage tanks such as gasoline, kerosene and diesel, the combustion speed is fast, the flame is high, the fire is fierce, and the heat radiation is strong, which is easy to cause the combustion of adjacent oil tanks and other combustibles. When the oil tank storing light oil products catches fire at the breather valve, inlet hole and the damaged part of the upper part of the oil tank, the combustion may appear torch like, the flame volume is small, and the combustion is relatively stable

standard specifications for crude oil testing and other heavy oil storage tanks are prone to boiling and splashing (also known as boiling and splashing), which is a prominent feature of crude oil storage tanks, oil tankers and oil barges. The evaporation speed of heavy oil is slow after ignition, and the heat absorbed during evaporation is less, but it is easy to cause the oil to overflow outside the tank and form boiling overflow. Sometimes oil products and flames rise in the air, spraying the fuel out of the tank dozens of meters or more than a hundred meters away, forming a splash phenomenon

II. Fire fighting measures for oil tank fires

(I) find out the fire in time. To put out the oil tank fire, we should carefully do a good job in fire detection, and should find out the type, quantity and liquid level of stored oil as soon as possible; Whether the tank body is deformed or damaged; Whether protective measures need to be taken for the threat of burning oil tanks to adjacent oil tanks and buildings; Range of liquid dispersion; Whether there is protective dike and drainage facilities around the oil tank; Whether there is water layer at the bottom of the tank and whether there is boiling overflow. 7. Hydraulic oil: the liquid level of the oil tank must be often checked and the oil must be replenished in time; Generally, the oil should be changed every 2000 to 4000 hours; But Zui is important that the oil temperature should not exceed 70 ℃ or the risk of splashing; Whether there is fire extinguishing equipment or sprinkler on the oil tank and whether it is easy to use; Whether the fire water source can meet the needs of fire fighting and cooling, etc. In the process of fire fighting, pay close attention to the wind direction and changes of the fire site, and observe whether the oil in the oil tank has signs of boiling and splashing, so as to take corresponding measures in time

(II) strengthen the cooling of the tank. Water injection cooling of the burning oil tank and adjacent oil tanks is an important measure to control the expansion of the fire, reduce the temperature and combustion intensity of the oil tank, and protect the burning oil tank from deformation and cracking. After the fire brigade arrives at the scene, it is first necessary to organize forces to cool the oil tank. The cooling combustion oil tank and adjacent oil tanks shall have sufficient water guns and water volume. When cooling, water should be sprayed on the upper part of the oil tank, and the water pressure should not be too high, so that the cooling water has a high utilization efficiency; The wall of the cooling tank should be uniform, and there should be no blank parts or intermittent water supply; Be careful not to inject cooling water into the tank, so as not to increase the water in the heavy oil tank and reduce the foam fire extinguishing efficiency. The supply intensity of cooling water is calculated according to the circumference of the tank wall. The water supply intensity of the cooling combustion tank is generally 0.6-0.8l/s.m. generally, a 19mm caliber water gun can control the circumference of the oil tank about 10m when the filling water level is 15m; The water supply intensity of cooling adjacent tanks (tanks within 1.5 times the diameter of the combustion tank) is generally 0.35-0.7l/s.m, calculated according to one-half of the circumference of the tank. When the combustion tank is a floating roof tank or an underground tank, the supply intensity of cooling water is 0.6 or 0.4l/s.m respectively. When the adjacent tank is semi underground and the top of the underground tank is not covered with soil, the cooling water supply intensity is 0.35l/s.m. The oil tank with insulating layer does not need to be cooled, but directly foam to extinguish the fire

(III) fire fighting preparation and launching a general attack for burning oil tanks. To put out the volatilization of bamboo powder in the burning oil tank, generally three steps should be taken: cooling protection, fire-fighting preparation and launching a general attack. Before launching a general fire-fighting attack on the burning oil tank, necessary fire engines, water, foam liquid or dry powder should be prepared and sufficient. First, put out the oil spill fire burning outside the oil tank to ensure that the attack road is unblocked. If necessary, mobilize the masses to build a temporary protective embankment to prevent liquid overflow and diffusion or conduct directional diversion to make the oil flow into the safety zone. If the general attack is launched in a hurry when the fire fighting force is insufficient or the fire fighting preparation is not ready, it will not only be difficult to achieve the purpose of fire fighting, but also unnecessarily consume (4) start the experimental machine and fire extinguishing agent

Copyright © 2011 JIN SHI