Brief introduction on using water oil isolation me

2022-08-21
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Brief introduction of using water and oil isolation method to put out oil tank leakage fire

in the production process of petroleum industry, leakage may occur anytime, anywhere. In any case, the leakage of oil tanks will cause a large number of oil products to disperse, and large-scale fires will occur in case of fire sources. Because the oil is continuously supplied for combustion from the leakage part, and the method of closing the valve cannot be used to directly cut off the leakage source and put out the fire, it has brought great difficulties to the fire fighting industry. The growth of China's plastic machinery industry has ushered in the golden age of Kemen growth and rapid growth

1 use the water oil isolation method to put out the oil tank leakage fire

when the oil tank bottom leaks, use the characteristics that the oil is lighter than water and insoluble with water to inject a certain amount of water into the tank, so as to form a water cushion at the bottom of the tank, so that the leakage is water rather than oil, so as to cut off the leakage source, use water to isolate the oil fire, the flame will be automatically extinguished, and then take plugging measures. This fire extinguishing method is called water oil isolation method. At 6:05 a.m. on January 17, 2002, located in the oil return station of an individual refinery in Beiwu village, Dongying District, Shandong Province, a gasoline tanker leaked and caught fire at the bottom of the oil tank, and the fire on the ground has reached more than 200 square meters. At that time, there were more than ten oil tanks around less than 100 meters away from the ignition point. If the burning oil tank truck exploded, the consequences would be unimaginable. Firefighters pumped water to the tanker to cool down and put out the fire with foam at the same time. It is very difficult to put out the fire because the bottom of the oil tank is constantly leaking oil. The fire headquarters decided to use water and oil isolation method to extinguish the fire. Under the cover of the water gun, the firefighters rushed to the top of the tank car to observe the fire, and quickly filled the tank with water from the oil loading port on the top of the tank with a hose. Five minutes later, the oil level in the tank rose, and the water formed a water oil isolation at the bottom of the tank. The water leaked from the leakage at the bottom of the tank, and the fire was finally extinguished

2 Some Thoughts on using water oil isolation method to put out the fire of oil tank leakage

water oil isolation method is a relatively effective fire fighting method, but it is not the only and absolutely feasible method, but also has its limitations

1 applicable object

it is applicable to the fire fighting of oil tank with the leakage part at the bottom, lower part or the valve or flange adjacent to the lower part of the oil tank, and it is also applicable to the leakage fire of liquefied petroleum gas and other dangerous goods that are insoluble in water and have a specific gravity lighter than water. One of the most effective methods is to use structural justice to fight the fire. If the leakage part is on the top or upper part of the oil tank, the height of the water cushion is difficult to reach the height of the leakage point, and the leakage source cannot be cut off, so the fire-fighting purpose cannot be achieved

2 operation requirements

in order to prevent boiling overflow and splashing, water injection measures must be taken to ensure the safety of water injection personnel on the premise of ensuring the strong cooling of the oil tank after the flame on the top or upper part of the oil tank and the ground flowing fire caused by oil tank leakage are extinguished and effectively controlled. If the oil level in the oil tank is high, the water injection is easy to cause the tank roof to fall, expand the fire and increase the risk, so the tank pouring measures must be taken before the water injection. Inject water after the vacated volume meets the water injection requirements. The water injection personnel should be precise and few, wear thermal insulation clothes to prevent clothes and equipment from being soaked by oil, and must choose the orifice with lower position as far as possible under the cover of flowering or spray water gun, so as to increase the corresponding safety factor

3 water injection requirements

use the height of the leakage point requiring constant speed movement, the cross-sectional area of the oil tank and consider a certain additional amount to calculate the required water injection, check the available water source at the fire site, quickly mobilize and inject into the tank at a speed far exceeding the leakage, and strive to extinguish the fire in the shortest time

4 leakage stoppage and emergency repair

after using the water oil isolation method to complete the fire-fighting task, it is necessary to quickly organize leakage stoppage and emergency rescue. When there is a certain level of water in the tank, stop injecting water and close all valves that can be closed. Cover the surface of the flowing oil surface after the fire is extinguished with foam, and seal the leaking parts with plugging gun, plugging bag, wooden wedge, plugging glue, etc. for plugging. At the same time, make preparations to replace the valve gasket, repair the valve and repair the crack in case of failure as soon as possible. During operation, at least 4 people should cooperate to use tools such as copper spanner, gasket and oxygen respirator to work quickly with water and carry out emergency repair. As water flows out of the tank, it is feasible to rush to repair with water at this time

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