Cleaning, rust removal and rust prevention treatment process for interior of liquid tank

Abstract

The invention relates to the technical field of liquid tanks, and particularly relates to a cleaning, rust removal and rust prevention treatment process for the interior of a liquid tank. The cleaning, rust removal and rust prevention treatment process for the interior of the liquid tank comprises the steps that a corrosion inhibitor solution is prepared and sprayed to the surface of the internal structure of the liquid tank in a pressure manner, waste liquid in the liquid tank is pumped out after spraying is completed, and the interior of the liquid tank is cleaned and dried. A large amount of dust cannot be generated through pressure spraying, the safety risk in the rust removal process is reduced, and safe operation of constructors is facilitated. A corrosion inhibitor can generate a compact oxidation film on the surface of a metal material within a short time, and the corrosion speed of the metal material is obviously reduced. The corrosion inhibitor solution is sprayed to the surface of the internal structure of the liquid tank in the pressure manner, after rust, oxide skin and other pollutants on the surface of the internal structure of the liquid tank are removed, the compact oxidation film is generated on the surface of the internal structure of the liquid tank, the corrosion speed of the surface of the internal structure of the liquid tank is reduced, and a good rust prevention effect is achieved on the surface of the internal structure of the liquid tank.

Description

technical field [0001] The invention relates to the technical field of liquid tanks, in particular to a process for cleaning, rust-removing and rust-proofing inside a liquid tank. Background technique [0002] In the construction process of the liquid tank, the steel plate used as the production material is not protected by shop primer after pretreatment. The manufacturing cycle of the liquid tank is as long as 9 months. The inside of the liquid tank has experienced a long period of wind and rain. Before use, the interior of the liquid tank needs to be cleaned, derusted and anti-rust treated; after the liquid tank is put into operation, the temperature inside the liquid tank is as low as -168°C, and the general coating cannot meet the low temperature cycle requirements. [0003] The conventional treatment plan is that construction personnel enter the tank and use power tools to grind and remove rust, and after purging and cleaning, continuously inject dry air or inert gas in...

AI Technical Summary

Problems solved by technology

On the one hand, there are potential safety hazards in the construction inside the liquid tank. A large amount of dust will be generated during grinding and derusting, and the construction personnel are placed in a closed space with only a single entrance and exit, which can easily lead to safety accidents; on the other hand, the tank can accommodate The number of construction personnel is limited, and the working cycle of grinding and derusting is long

At the same time, it is difficult to derust parts such as scaffolding, pipelines, and outfitting parts, and parts that have been derusted are also prone to rust again due to improper maintenance of the tank environment during construction

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