Steel waste acid and alkali liquor storage tank inner surface anticorrosion method

Abstract

The invention discloses a steel waste acid and alkali liquor storage tank inner surface anticorrosion method. The steel waste acid and alkali liquor storage tank inner surface anticorrosion method utilizes the advantage of being strong in acid and alkali corrosion resistance of ethylene, and prepares a thick ethylene coating on the inner surface of a tank body. The steel waste acid and alkali liquor storage tank inner surface anticorrosion method includes the concrete steps that in a preparation method of the side wall anticorrosion coating, an extrusion forming machine is used for forming ethylene plates through extrusion according to the curvature of the inner wall of the tank body, the thickness of the ethylene plates is confirmed according to requirements of a user for use life, and the thicker the ethylene plates are, the longer the use life is; an acid and alkali corrosion resisting bonding agent is used for bonding the reverse sides of the ethylene plates and the inner wall of the tank body; a pressure hot melting method is used for connecting side ends of the ethylene plates; and the bottom and the top of the tank body are planes, flat ethylene plates can be directly purchased and cut into squares or other shapes facilitating splicing, and similarly, the reverse sides of the flat ethylene plates after being cut are bonded with the inner wall of the tank body, and the pressure hot melting method is used on the side faces of the flat ethylene plates after being cut. Due to the fact that the pressure melting weld is adopted, a weld joint is good in seal performance; the construction technology is simple, energy consumption is low, and efficiency is high; and forming and connection of the ethylene plates are low in cost and high in efficiency, the ethylene plates are long in use life, reduction of repair frequency and cost of a waste acid and alkali liquor storage tank is facilitated, and economic benefit of an enterprise is improved.

Description

technical field [0001] The invention belongs to the technical field of metal surface corrosion and protection, in particular to an anticorrosion method for the inner surface of a steel waste acid and alkali storage tank. Background technique [0002] Both waste acid and waste alkali liquid are hazardous waste products and must be treated in a harmless and resourceful manner. It is usually stored for a period of time in large storage tanks before processing. In order to ensure the structural strength requirements, large storage tanks are usually made of steel materials. The waste liquid contained in the tank is mixed acid or mixed alkali. The composition and concentration are not fixed. Some contain fluorine, some contain copper and so on. If the inner wall is not treated with anticorrosion, the steel tank will be severely corroded until perforated. [0003] Commonly used surface anti-corrosion technologies such as thermal spraying, laser cladding, surfacing, stick coati...

AI Technical Summary

Problems solved by technology

That increases the cost and delays the construction period