Gas space closed-loop inerting automatic processing system and method for old tanks in oil stations

Abstract

The present invention proposes a gas space closed-loop inerting automatic processing system and method for old gas tanks in oil stations, including a gasoline tank, a gas supply device and a VRU device, the gas supply device and the gasoline tank are connected through a gas supply pipeline, and the A pressure relief valve and an intake valve are connected to the air supply pipeline, and the VRU device is connected to the gasoline tank through an outlet pipeline, and an electronic pressure transmitter and an oxygen solubility detector are connected to the outlet pipeline, and the VRU The device is also connected with a return air line and an exhaust line, the other end of the return air line is connected to the air supply line between the pressure relief valve and the intake valve, and the return air line is provided with a return air line. A valve, an exhaust valve is arranged on the exhaust pipeline. The gas supply device continuously supplies gas to continuously liquefy the oil and gas in the gasoline tank, so that the oil and gas in the gasoline tank are liquefied into oil liquid, so as to achieve the inert treatment of the gasoline tank.

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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