Chemical Cleaning of Equipment in Refineries and Petrochemical Plants

Chemical cleaning offers significant advantages over mechanical methods, including cleaning without dismantling equipment, more uniform and effective deposit removal, reduced risk of mechanical damage, shorter shutdown and decontamination times, and lower waste generation. It can also enable the recovery of valuable hydrocarbons, reducing disposal costs.

The cleaning method and chemicals are selected based on deposit analysis, process conditions, and equipment materials of construction. Acidic solutions are commonly used for inorganic scales, while alkaline cleaners, solvents, and specialized formulations are used for organic, hydrocarbon, tar, and polymer deposits.

Chemical cleaning can be performed in situ or on-site using mobile circulation systems, steam-phase cleaning, immersion, or controlled on-stream applications. It is suitable for columns, heat exchangers, coolers, condensers, boilers, drums, vessels, and piping systems.

Proper chemical selection and corrosion control are essential to protect equipment, minimize environmental impact, and ensure safe and efficient cleaning operations. Modern chemical cleaning technologies can significantly reduce shutdown duration while improving equipment performance and operational reliability.