Automatic processing system and method for gas space closed loop inerting of old tank of oil station

Abstract

The invention provides an automatic processing system and method for gas space closed loop inerting of an old tank of an oil station. The automatic processing system comprises gasoline tanks, gas supply devices and a VRU, and the gas supply devices are connected with the gasoline tanks through a gas supply pipeline; the gas supply pipeline is connected with a pressure relief valve and an intake valve, and the VRU is connected with the gasoline tanks through a gas outlet pipeline connected with electronic pressure transmitters and an oxygen solubility detector; the VRU is further connected witha gas return pipeline and an exhaust pipeline, and the other end of the gas return pipeline is connected with the part, between the pressure relief valve and the intake valve, of the gas supply pipeline; and the gas return pipeline is provided with a gas return valve, and the exhaust pipeline is provided with the exhaust valve. Gas is continuously supplied through the gas supply devices so that oil gas in the gasoline tanks is liquefied continuously; and the oil gas in the gasoline tanks is liquefied into oil liquid, and the inerting treatment to the gasoline tanks is achieved.

Description

technical field [0001] The invention relates to the field of oil storage and transportation in oil stations, in particular to a closed-loop inerting automatic processing system and method for the gas space of old tanks in oil stations. Background technique [0002] Petroleum companies have been trying every means to promote the implementation of VOC prevention and control work in all links of petrochemical production, storage and transportation, and retailing. Especially in the anti-seepage renovation project of gas stations, a large amount of oil and gas in old oil tanks in gas stations cannot be effectively and timely processed. It will be directly emitted into the surrounding air, causing air pollution and seriously affecting our atmospheric environmental governance work. In addition, oil and gas are likely to volatilize into the atmosphere during the gas station anti-seepage renovation project, and oil and gas are also easy to accumulate in the working environment. Due t...

AI Technical Summary

Problems solved by technology

However, when the nozzle flange is opened, a lot of oil and gas will be emitted. The accumulation of oil and gas will cause a safety hazard. Once it encounters an open flame, it will detonate

In addition, many treatment methods need to use oil inhibitors to carry out chemical reactions in the tank, but the sewage after the oil inhibitors react with the residual oil in the tank must be cleaned up, and cleaning these sewage is another difficult operation

In short, the cost of the existing treatment methods is very high, and there is no real closed-loop inerting oil tank equipment at present

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