Automatic pressure balancing device of normal pressure tank

Abstract

The invention relates to an automatic pressure balancing device of a normal pressure tank, which comprises the normal pressure tank, a breathing opening is arranged on the normal pressure tank, and abreathing tube is connected to the breathing opening. The automatic pressure balancing device is characterized in that a breathing bag is hung in the normal pressure tank, a thin neck head is arrangedat the top of the breathing bag, and the thin neck head extends out of the breathing opening, is fixed on the breathing opening and is communicated with the breathing tube. When the pressure in the tank drops, air outside the tank enters the breathing bag hung in the normal pressure tank along the breathing tube under the action of atmospheric pressure, so as to complement the pressure in the tank; when the liquid level or the temperature of the tank increases, the pressure in the tank rises, the breathing bag is extruded, and partial air is discharged from the breathing bag along the breathing tube. Thus, the media inbreathed and discharged by the normal pressure tank are all air, and the air and the oil gas are thoroughly separated, thereby realizing the zero emission of the oil gas, and solving the problems of oil loss and environmental pollution; the automatic pressure balancing device of the normal pressure tank can also be used in the production, storage or transportation process of solvents, chemicals and the like.

Description

technical field [0001] The invention relates to an automatic pressure balance device for atmospheric pressure tanks, normal pressure vertical tanks and small vaulted tanks used in the production, storage and transportation of oil products. Background technique [0002] Oil products play a very important role in national economic construction and people's lives, and there are also problems of volatilization of oil and gas and environmental pollution in the process of production, transportation and storage of oil products. Among them, the problem of oil and gas volatilization is becoming more and more popular attention. Statistics show that every time the temperature rises by 1 degree Celsius, gasoline will emit 0.21% of oil gas. The longer the storage period, the greater the ratio of the oil gas volume to the oil liquid volume in the tank, and the more oil gas will be emitted by breathing. If 2 million tons of oil are stored in oil tanks with a utilization rate of 50% for 30...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of oil loss and environmental pollution caused by breathing and discharging oil and gas in the existing atmospheric tank, and to provide an automatic pressure balancing device for atmospheric tanks that prevents the discharge of oil and gas

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