Large methanol storage tanks generally use internal floating top storage tanks, which are mainly composed of tank body, internal floating plate, sealing device, guiding and anti-rotation device, electrostatic export facility, air vent, high liquid level alarm and so on. The top of the internal floating top tank is combined with the vault and the floating top, the external is the vault and the internal is the floating top.

The floating top of the internal floating top tank floats on the liquid storage surface, and there is an annular space between the floating top and the tank wall, and there is a sealing element in the annular space. Floating roof and sealing components together constitute the reservoir layer on the surface of the  with reservoir floating up and down, the liquid storage tank and completely separated, the atmosphere, to prevent rain water impurities into the tank, to reduce the evaporation loss in the process of reservoir storage, reduce the air pollution, easy to guarantee the quality of liquid and safety, and also slow down the ageing process of the fixed seal around speed, prolonged the service life. Therefore, the internal floating roof tank is a safe, economical and simple structure to reduce evaporation loss of stored materials under fixed roof.

Generally, methanol is stored at room temperature in the storage tank. Methanol itself has almost no corrosion to carbon steel, but because of the existence of water and impurities in the production and storage process of methanol, it should be considered to take anti-corrosion coating on the inner wall of the tube for anti-corrosion treatment when storing methanol. Domestic production of methanol in the main impurities for water, a small amount of other impurities containing dimethyl ether, low-level alcohol, alkane, formic acid, etc., methanol containing impurities in the PH value between 4-7, mostly showing weak acid, in the tank wall caused by corrosion for chemical corrosion and electrochemical corrosion.

The paint used in the inner wall of the tank should not only be acid-resistant, alkali-resistant, anti-seepage and anti-aging properties, but also have certain conductivity and electrostatic properties. The resistivity of the anticorrosive coating used in the inner wall of the storage tank must be less than that of methanol in the tank, otherwise it will hinder the escape of the electrostatic charge in methanol, because of the existence of charge, it will also accelerate the corrosion of the inner wall of the tank, forming unsafe factors.

Jiangmen jin li nitrogen machinery co., LTD is a chemical machinery manufacturing enterprises, the company has a history of more than 30 years fabrication of pressure vessels, has a sound quality assurance system and a technical all staff team of workers, technicians, in the equipment in chemical industry, fine chemical industry, environmental protection, biological pharmacy, food, oil refining, paint, paint, glue, Machinery processing and other industries.

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