Horizontal vessels such as separators and drums are traditionally very difficult to clean. Common industry practices require fresh air masks to enter the vessel and manually dig out sludge remaining in the unit. Cleaning the vessel can take numerous shifts and be very hazardous. Alternatively, ZymeFlow® Decon Technology uses chemistry to eliminate contaminants and condition the solids before entry for greater ease of removal.
The ZymeFlow Decon team approaches horizontal vessels, such as separators, using a Boil-Out application method. Following de-inventory procedures, water, chemistry, and steam are added to the unit, creating a "boil-out." The chemistry penetrates sludge to quickly release hydrogen sulfide (H2S), benzene, and combustible gases (LEL) to the relief system. Pyrophoric iron sulfides and any remaining hydrogen sulfide are simultaneously oxidized by the chemistry. As the boil-out continues, the steam and chemistry vaporize, treating equipment walls and vapor space.
After approximately 8-12 hours, steam is stopped and the chemistry aids in the separation of residual hydrocarbons, water, and solids. The remaining water can be sent directly to wastewater depending on refinery parameters. The solids in the vessel will be decontaminated and hydrocarbon-free for ease of removal. This treatment drastically reduces the time needed for final clean out and removes the need for fresh air.