Cleaning solution and cleaning method for coke on inner surface of renewable pipeline

Abstract

The invention discloses a cleaning solution and a cleaning method for coke on the inner surface of a renewable pipeline. Use a cleaning solution with sodium hydroxide and potassium permanganate as the main components to ultrasonically clean the inside of the pipeline at 80°C for 8 hours, which can remove the coke on the inner surface of the pipeline, and the cleaning process will not cause corrosion damage to the pipeline. The cleaning solution of the invention is suitable for cleaning the coke formed by various endothermic hydrocarbon fuels on the inner wall of metal pipelines.

Description

Technical field [0001] The present invention relates to the surface treatment of renewable pipelines, specifically to clean the cooling pipe and other metal tubing inner surface of coke without destroying or damaging the pipeline. Background [0002] At present, hydrocarbon fuels are widely used in industrial production and daily life, but hydrocarbon fuels inevitably produce carbon deposition during the cracking process and are further heat coke, thereby forming coke on the wall. The resulting coke can reduce the heat exchange efficiency of the metal surface, reduce the corrosion resistance of the metal material, and clog valves and filters, and even block the oil circuit to stop the engine, resulting in serious adverse consequences. [0003] Cleaning and removing coke from the inner surface of renewable pipes made of metal materials at low temperatures (<100 °C) can not only reduce safety hazards, but also improve the service life of pipelines. However, the low temperature c...

AI Technical Summary

Problems solved by technology

[0004] 1) The cleaning of the inner surface of the pipeline is limited by the shape and size of the inner cavity. Traditional physical cleaning methods (such as brushing) are difficult to apply, and the cleaning quality cannot be guaranteed

[0005] 2) The chemical cleaning agent has strong corrosiveness, and it will also corrode the pipeline while dissolving coke, so that the pipeline cannot meet the use requirements

[0006] 3) Coke has strong inertness at low temperature (<100°C), and is not prone to chemical reactions, resulting in difficulty in coke removal

However, for metal pipelines, pipelines without surface coating (more in quantity and greater value for recycling) still face the problem of pipeline corrosion damage caused by chemical cleaning

At the same time, the cleaning process uses soaking as the main method, and there is a problem of incomplete cleaning for small-sized pipes.

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