Refinery Decontamination

ProDecon® specialise in refinery decontamination for faster safer turnarounds.  With years of international experience across the full range of refinery units, ProDecon® offer full service delivery with our proven proprietary chemicals delivered by experts.

ProDecon® recognise the dynamic nature of refinery units and have developed a range of chemicals and application techniques to decontaminate columns, vessels, exchangers and piping removing hydrocarbons from heavy asphaltenes to light ends and benzene.  Each system is individually assessed by our engineers to determine the most efficient means of decontamination, considering the system design, operational history and client expectations.  From rapid vapour phase decontamination in just 8-12 hours to liquid circulations and full unit decontamination ProDecon® have the right chemistry, the right equipment and the right people.

Areas of Application

  • FCCU
  • CDU
  • VDU
  • Delayed Coker
  • Vis Breaker
  • Hydrocracker
  • Desalters
  • Pre-heat trains 

Vapour Phase Decontamination

ProDecon®’s V-Purge™ and Decon-88™ family of chemicals are highly effective in vapour phase decontamination.  The chemistry is introduced into the steam flow through specially designed manifolds and is carried throughout the system effectively contacting all surfaces. The chemistry works to free the hydrocarbons and release gaseous contaminants.  The V-Purge™ chemistry works simultaneously to oxidise pyrophoric iron sulphide leaving the columns and vessels safe for man entry with zero LEL, Zero H2S and zero benzene in just 8-12 hours.  With minimal invasive set up and effluent generation our vapour phase decontamination is a cost effective and rapid option across all fractionation columns.

Liquid Phase Decontamination

ProDecon® provide a full service liquid phase decontamination service including circuit design, temporary piping, pumps and effluent handling. The process is designed taking into consideration the target areas of heavy fouling, flow distribution and hydraulic loading. This process is particularly effective in eliminating the need for hydrojetting in columns, vessels and heat exchangers removing heavy deposits, residues, sludges and insoluble materials.  This process is commonly combined with the vapour phase decontamination for use in column and overhead systems quickly achieving gas free conditions and vessel cleaning, allowing maintenance to proceed immediately on handover and reducing the overall turnaround schedule.

Heavy Residue and Slurry Circuits

Fouling from asphaltenes, waxes and tars in heavy hydrocarbons on vis breakers, vacuum residues, cokers and slurry circuits cause particular problems in columns bottoms and heat exchangers.  Binding together fine coke formations this fouling can develop into stubborn hard deposits causing a loss in efficiency and presenting a challenge for mechanical cleaning. ProDecon®’s Pro-Flow™ and Pro-Solve™ products are especially designed to help alleviate this issue. Working in the wash oil phase during the turnaround Pro-Flow™ acts to break down the heavy asphaltenes, improving sludge removal and accelerating handover and improving the effectiveness of the wash oil circulation.

Pro-Solve™ and Pro-Flow™ can both be applied to heat exchangers in-situ to help restore performance providing energy savings and increase productivity.

Full Unit Decontamination

ProDecon® specialises in the engineering of Full Unit decontamination, integrating fully with the refinery shutdown and de-inventory procedure, to provide a completely hydrocarbon free unit. Where traditional decontamination processes focus on the column and overhead systems, this complex process operates from the battery limit feed through all piping, exchangers, vessels and columns including product run downs, flare and closed blow down systems.  Handover from operations to Turnaround team with a completely hydrocarbon and H2S free unit, provides the maximum level of safety for the maintenance on the unit.  With all vessels piping and exchangers cleaned, blinding requirements and mechanical cleaning needs are minimized, reducing overall turnaround schedule and reducing costs.