Liquefied hydrocarbon storage tank leakage positioning method, emergency disposal method and device

The invention discloses a liquefied hydrocarbon storage tank leakage positioning method, which comprises the following steps: detecting the liquid level height and the gas phase gauge pressure in a liquefied hydrocarbon storage tank at fixed time intervals, and calculating the leakage intensity to obtain the height position of a leakage point. The invention discloses an emergency disposal method for leakage of a liquefied hydrocarbon storage tank, which comprises the following steps: after determining the height position of a leakage point, calculating theoretical leakage time, water injection action time and stored liquid discharge time, and then determining to take a water injection measure or a stored liquid discharge measure. The invention further discloses a liquefied hydrocarbon storage tank leakage emergency disposal device for realizing the emergency disposal method. According to the invention, a basis is provided for an emergency disposal scheme, safe and reliable disposal can be ensured, and the eff